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1
Albarella, Umberto, Valeria Ceglia et Paul Roberts. « S. Giacomo degli Schiavoni (Molise) : an early fifth century AD deposit of pottery and animal bones from central Adriatic Italy ». Papers of the British School at Rome 61 (novembre 1993) : 157–230. http://dx.doi.org/10.1017/s0068246200009971.
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S. GIACOMO DEGLI SCHIAVONI (MOLISE): UN DEPOSITO DI CERAMICA E OSSA ANIMALI DELL'INIZIO DEL V SECOLO d.C.—ADRIATICO CENTRALE, ITALIAGli scavi recentemente effettuati presso S. Giacomo degli Schiavoni (CB) hanno portato alla luce un complesso di carattere industriale, con zone lavorative, magazzini ed un sistema idraulico di pozzi, contenitori e fogne, centrato su di una cisterna.Il riempimento di questa cisterna conteneva una grande quantità di ceramica (400 vasi circa), databile agli anni 420–440 sulla base della terra sigillata chiara africana e focese ivi rinvenuta. Inoltre erano presenti anfore da trasporto dell'Africa e del Mediterraneo orientale, lucerne di produzione locale e molta ceramica dipinta e comune (anche quest'ultima, in parte, inportata dal Mediterraneo orientale).La presenza di scarti di fornace di ceramica dipinta e comune e l'alta percentuale di ceramica importata suggeriscono che il sito avesse un ruolo economico abbastanza importante durante il tardo impero. La qualità delle importazioni dal Mediterraneo orientale suggerisce la presenza di un sistema economico apparentemente diverso da quello dell'Italia tirrenica.Lo scavo della cisterna ha messo in luce anche un piccolo campione faunistico di estremo interesse.La relativamente ampia varietà di specie, la inusuale (per questo periodo) predominanza degli ovicaprini sui suini e la presenza di una scapola di cammello (o dromedario) sembrano rappresentare gli elementi di maggiore interesse di questa fauna.Interessante è anche la presenza di ossa di equidi (sia cavallo che asino) il cui ipotetico utilizzo come animali da trasporto fa supporre che il sito avesse un ruolo in un sistema economico di più ampia scala, nel cui ambito anche la presenza del cammello potrebbe essere interpretata.Seppure l'incompleto recupero del materiale (dovuto ad assenza di setacciatura) e la piccolezza del campione invitino alla cautela, sembra lecito ipotizzare la presenza di un sito dalle molteplici attività economiche: allevamento (probabilmente per carne, latte e lana), agricoltura, caccia, commercio.
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Di Taranto, Enrico. « Il co-branding nell'industria alberghiera : un caso di studio ». ECONOMIA E DIRITTO DEL TERZIARIO, no 2 (décembre 2010) : 247–63. http://dx.doi.org/10.3280/ed2010-002003.
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Il presente lavoro si colloca all'interno del filone di studi che approfondisce le potenzialitŕ e i rischi degli accordi di co-branding nel settore turistico-alberghiero. La formazione di tali accordi č generalmente finalizzata ad allargare il raggio d'azione delle marche coinvolte, ad incrementarne la reputazione al fine di entrare in nuovi mercati, comprendere e presidiare nuove frontiere tecnologiche, ridurre i costi attraverso le economie di scala e/o di condivisione nonché rinnovare l'immagine aziendale (Collesei e Checchinato, 2007; Busacca e Bertoli, 2006). Se fino ad anni relativamente recenti tali accordi hanno riguardato soprattutto le relazioni di tipo verticale e orizzontale, negli ultimi tempi sono andati invece acquisendo rilevanza gli accordi di tipo laterale, in cui la relazione per la condivisione della marca s'instaura fra imprese che operano in settori merceologici differenti: i partner sono cioč aziende che, pur collaborando in alcune attivitŕ, mantengono la propria vocazione a competere in ambiti distinti (Bertoli, 1995; Della Corte e Sciarelli, 2003). In particolare, obiettivo del lavoro sarŕ quello di presentare una iniziativa di cobranding laterale sviluppata da due imprese di grande tradizione e operanti in settori differenziati: l'Hotel "Il San Pietro" di Positano - tra gli alberghi piů prestigiosi al mondo - e la Ceramica Stingo - antica manifattura di maioliche artistiche protagonista del panorama proto-industriale dell'area napoletana. Due imprese, dunque, lontane per settore di attivitŕ, ma vicine per allure, tradizione e qualitŕ, hanno dato vita ad una efficace simbiosi che testimonia come marchi di eccellenza possano interagire, potenziarsi a vicenda e, per quanto riguarda il settore turistico, rappresentare un peculiare fattore di attrattivitŕ di cui l'impresa ricettiva deve dotarsi per posizionarsi in una situazione di vantaggio rispetto ai concorrenti.
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Di, Yong Jiang, Bi Jia et Jun Wang. « Synthesis and Microstructure of Porous Ceramics Made from Industrial Solid Residues ». Key Engineering Materials 602-603 (mars 2014) : 179–83. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.179.
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Industrial solid residues and poor quality clay as main raw material were used to prepare porous ceramic balls by ceramics process with coal and wood powder as pore-forming additive to improve the porosity of the ceramics ball. Effect of pore-forming additive on the properties of ceramic ball was investigated. The phase composition and section morphology of the ceramics balls was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The apparent porosity and crushing force of the ceramic balls were tested by Archimedes hydrostatic weighing method and crushing strength tester respectively. The tested results showed that the apparent porosity of the porous ceramic balls mainly influenced by species and addition amount of the pore-forming additive. The apparent porosity increases with the adding of the pore-forming additive. The apparent porosity and crushing force of the optimized porous ceramic balls was 49.68% and 1.17 kN respectively, which is a potential candidate used for waste water filtration.
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Jiang, Hong. « Research on Applied-Information Technology in Online Compact System Based on Serial Communication ». Advanced Materials Research 1046 (octobre 2014) : 431–35. http://dx.doi.org/10.4028/www.scientific.net/amr.1046.431.
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The ceramic industry fall into two main categories: daily used ceramics and craft ceramic. With the demand for daily used ceramics is increasing in my country, ceramics enterprises are faced with intense market competition. Based on the investigation of ceramic industrial production, the traditional method for Ceramic production has some disadvantages, such as long periods of dies production, complicated production process, wasting human resource, high cost, short life, poor quality, easy to damage. According to the characteristics of daily used ceramics, this paper presents a rapid prototyping system based on RS-232C compacts. This system can cancel the long and complex development process of the dies, and can achieve rapid prototyping of ceramic body, thereby greatly reducing the cost of production of ceramic manufacturers.
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Pek, Emrah, Sezer Cihaner Keser et Çetin Güler. « Deficiencies and potential corrections in ceramic art education according to the ceramic industry employees ». Cypriot Journal of Educational Sciences 17, no 9 (30 septembre 2022) : 3367–77. http://dx.doi.org/10.18844/cjes.v17i9.7739.
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Ceramics may be considered one of the most important and oldest inventions that give information about the history of humanity. Dating back to 8000 BC, ceramic has been used in many areas of daily life, such as kitchenware, sanitary ware, space technology, weapon industry and artistic production. In this context, the use of ceramics as an industrial material has resulted in the ceramic industry which requires education as an indispensable field. This study aims to determine the deficiencies and potential corrections for these deficiencies from the views of the employees who currently work in the field of ceramics. The study was conducted as a phenomenological study, which is one of the qualitative research designs. Fifteen employees participated in the study. The data of the study was collected by interviewing the employees. The findings of the study suggest that outdated curricula, narrow and insufficient industrial field courses, the need for self-development of the lecturer in the industrial field, the necessity of establishing a relationship between the ceramic industry and education and insufficient and inadequate computer design courses with software not suitable for the industry are the main deficiencies along with some others. Keywords: Art education, ceramic, industrial ceramic, design, sector, employee
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Sugiyama, Toyohiko, Hajime Nagae, Kazuo Suzuki et Kenichi Nakano. « Ceramic Brick with High Water Retentivity Prepared from Ceramic Waste and by Products ». Advances in Science and Technology 45 (octobre 2006) : 2235–39. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2235.
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Many kinds of industrial waste were examined as potential constituents of ceramic bricks or tiles. The basic physical properties of these materials were measured, such as sintering temperature, water absorption, porosity, density, color, chemical stability and bending strength. Several kinds of sintered ceramics containing large amounts of waste materials were obtained by adjusting the amount of the waste materials added to the ceramics. These were fired at temperatures lower than 1000°C. A lowering of firing temperature results in a reduction of discharge of CO2 on the production process. Ceramic brick with high water retention is expected to mitigate the heatisland phenomenon by the latent heat of evaporation. Porous ceramics were prepared using industrial waste, burned ash and recycled roofing tile as raw materials. The permeability, water retentivity, water absorption, and other properties of the porous recycled ceramics were investigated. The pF value of the ceramics was measured as an indicator of water retentivity. An appropriate method of characterizing water retentive ceramic materials was also discussed based on results of fundamental examination of the ceramics under practical conditions.
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Regueiro, M., E. Sánchez, V. Sánz et E. Criado. « Cerámica Industrial en España ». Boletín de la Sociedad Española de Cerámica y Vidrio 39, no 1 (28 février 2000) : 5–30. http://dx.doi.org/10.3989/cyv.2000.v39.i1.872.
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He, Jiabei, Mengshan Song, Kaiyun Chen, Dongxiao Kan et Miaomiao Zhu. « Polymer-Derived Ceramics Technology : Characteristics, Procedure, Product Structures, and Properties, and Development of the Technology in High-Entropy Ceramics ». Crystals 12, no 9 (13 septembre 2022) : 1292. http://dx.doi.org/10.3390/cryst12091292.
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Ceramics have become indispensable materials for a wide range of industrial applications due to their excellent properties. However, the traditional preparation of ceramic materials is often time-consuming and involves high sintering temperatures. These result in considerable energy consumption and high production costs, which limit the application of these materials in some industries. This paper focuses on the advent of polymer-derived ceramics (PDCs) technology, which enabled the application of ceramics to fibers, composites, coatings, and films, mainly due to the excellent design, process, and low-temperature ceramic properties. We review and evaluate the important research progress made in polymer-derived ceramics technology in recent years and discuss its recent development into high-entropy ceramics. The development of polymer-derived ceramics technology in the field of high-entropy ceramics has broad research prospects, which can greatly improve the understanding and design of high-entropy materials and accelerate their application in the industrial field.
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Chen, Lili, Ulana Cikalova, Beatrice Bendjus, Stefan Muench et Mike Roellig. « Characterization of ceramics based on laser speckle photometry ». Journal of Sensors and Sensor Systems 9, no 2 (20 octobre 2020) : 345–54. http://dx.doi.org/10.5194/jsss-9-345-2020.
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Abstract. Advanced ceramic components are frequently used in industrial applications. As a brittle material, ceramic reacts very suddenly to excessively high stresses. Existing defects lead to rapid crack growth followed by spontaneous destruction. This leads to a functional failure of the entire component. It is therefore important to develop innovative techniques to ensure a good quality condition of ceramic products. Laser speckle photometry (LSP) is an optical nondestructive testing method. It is based on the dynamic analysis of time-resolved speckle patterns that are generated by an external excitation. In this paper, we will present two investigations on ceramic components using the LSP technique. One is the nondestructive stress characterization on ceramic surfaces, and the other is the defect detection on ceramics components. The aim is to improve the quality and safety control of ceramic production in the challenging industrial field. Preliminary results have shown the potential of the LSP sensor system for the nondestructive characterization of ceramics in terms of stress monitoring and surface defect detection.
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Ding, Liang. « Analysis of Creative Teaching of Ceramics and Student Creativity in Colleges and Universities in China ». Scientific and analytical journal Burganov House. The space of culture 18, no 2 (10 mai 2022) : 80–86. http://dx.doi.org/10.36340/2071-6818-2022-18-2-80-86.
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Ceramic art has been an important part of human culture for thousands of years and it has had a significant influence all over the world. China is the home country of ceramics and the progression of ceramic culture has contributed much to the development of human history and civilisation. Education has played a key role in this progression of ceramic art and through ceramics education, the ceramic culture, ceramic arts and the crafts of ceramics, ceramic skills have been passed down from one generation to the next. Ceramics education is an important part of art education. Faced with the globalisation of culture and economics, Chinese ceramic art education and global ceramic art education have a mutual influence on each other and are closely linked together. Therefore, achieving perfection and development in the ceramics education in Chinese universities, specifically in ceramics teaching, is important. In the long term, training students that have creative abilities will influence the current status and the future of ceramics education in China. Today, in China, ceramics are classified as either ‘handwork’ or ‘industrial arts’, focusing on production-oriented requirements like practicality, aesthetic appearance and economy. Ceramics teaching has been restricted by this traditional thinking as it conforms to existing stereotypes. Lacking an interactive paradigm that is open to change, the ceramics teaching in China attaches great importance to the mere training of skills. By analysing the current situation of ceramics education in colleges and universities in China, this paper discusses how to use creative teaching methods to guide students' learning consciousness, improve learning motivation and develop students' creativity from the perspectives of creative teaching and teaching creativity. This is to provide enlightening reflections on the cultivation of students' creativity in ceramics education in colleges and universities.
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Bekkaliev, N. M. « USE OF INDUSTRIAL WASTE IN CERAMIC BRICK TECHNOLOGY ». Bulletin of Kazakh Leading Academy of Architecture and Construction 84, no 2 (15 juin 2022) : 163–71. http://dx.doi.org/10.51488/1680-080x/2022.2-18.
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The production of wall ceramics is one of the most material-intensive industries. It is known that the quality of ceramic products is determined by the properties of the raw materials used. The article provides information on changes in the properties of natural raw materials for the production of ce-ramic bricks. In the production of ceramic bricks, it was found that various man-made raw materials can be a good addition to natural raw materials.
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Zubanova, Nadezhda. « Alexei Vasilyevich Filippov and the State Museum of Ceramics ». Человек и культура, no 6 (juin 2021) : 13–19. http://dx.doi.org/10.25136/2409-8744.2021.6.37013.
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This article refers to previously unknown pages in the history of State Museum of Ceramics – its functioning as an industrial museum. The transformation of the Museum of Porcelain Art into the “industrial” State Museum of Ceramics took place in conditions of escalating discussion on the need for creating "industrial art” in the USSR. One of the initiators of such direction was the ceramic artist A. V. Filippov. His name earlier was not associated with the State Museum of Ceramics; however, Filippov contributed to the emergence of art-industrial laboratory in the museum structure, which not only experimented with manufacturing glazes and ceramic mixtures, but also set the production process. The novelty of this article lies in introduction into the scientific discourse of previously unknown archival documents, which allows tracing the history of origin of the art and ceramic laboratory. It was deemed that the structural division was opened in the State Museum of Ceramics. However, the laboratory was originally founded by A. V. Filippov at the Faculty of Ceramics of the Russian State Art and Technical School, then transferred to the Institute of Silicate Chemistry, and only in 1928 transferred from the Institute to the museum. The establishment of the laboratory has prompted a significant shift in the vector of development of the museum towards instusrial museum. It is also proven that Filippov developed the concept of exhibitory-manufacturing department in the museum, which included educational activity with interactive elements. These museum competencies would be in demand in the world museum practice only by the late XX century, which determines the activity of the State Museum of Ceramics during 1920s as innovative.
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Watanabe, Keiichiro, Tomonori Takahashi, Tomoki Nagae et Hiroyuki Tsuji. « Precision Forming and Machining Technologies for Ceramic-Based Components ». International Journal of Automation Technology 12, no 5 (5 septembre 2018) : 739–49. http://dx.doi.org/10.20965/ijat.2018.p0739.
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Structural ceramics components for industrial use are classified under two categories: one that is originally designed for ceramics (Ceramic Origin), and the other that is originally designed for metals and subsequently replaced with ceramics because of their improved hardness and resistance to both heat and corrosion (Metal Origin). Ceramic insulators for power lines and catalytic substrates used to control automotive emissions in gasoline engines are “Ceramic Origin” components. As ceramics are difficult to machine, a precision mold has been used in the forming process to minimize the machining volume in the case of “Ceramic Origin” components. Meanwhile, ceramic turbo charger rotors and valves for automotive engines are “Metal Origin” components, which not only require durability under severe operating conditions but also severe dimensional accuracy, similar to metal parts. These components have been derived from extensive R&D efforts in materials and process technologies for ceramic gas turbines, which have been implemented in the majority of advanced countries since the 1970s. This paper includes some examples of precision forming and machining technologies for both types of ceramic components developed by NGK Insulators, Ltd., and highlight their issues. Finally, the possibility of new types of ceramic-based components will be introduced.
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Sun, Chuan, Yun Kai Li, Hu Wang, Ming Ming Wan, Yun Fei Wang et Quan Zhen Jiang. « On the “Ceramic Constrained by Metal” Composite Materials ». Advanced Materials Research 833 (novembre 2013) : 266–70. http://dx.doi.org/10.4028/www.scientific.net/amr.833.266.
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Ceramics are widely used in every field of contemporary industrial because of its many excellent properties. However, its mechanical property is great brittleness and small toughness for the characteristics of internal chemical bond, which restricts its application range to a large extent. Therefore, how to improve mechanical properties of ceramic materials has been attracted a great attention in the relevant area. For ceramics using at room temperature, a method which can avoid brittle failure by metal confinement outside of ceramics is given. And the feasibility of this method is discussed. Three point bending tests were conduct on ZrO2 ceramics with and without lateral confinement separately. Base on the much of experimental conclusion, the bending strength of ceramic with lateral confinement was improved largely.
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You, Hao, Hongjuan Sun, Tongjiang Peng, Xin Zhou, Li Chao et Can Wang. « Effects of Illitic Clay on the Phases, Microstructure, Physical Properties and Pyroplastic Deformation of Industrial Slag Ceramics ». Materials 16, no 1 (27 décembre 2022) : 233. http://dx.doi.org/10.3390/ma16010233.
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Preparing ceramic materials is a meaningful way to treat and utilize industrial slags. In this work, high-performance and low-deformation industrial slag ceramics were prepared from Ti-extraction blast furnace slag and illitic clay. The phase composition and contents, microstructure, physical properties, and pyroplastic deformation of ceramic samples were investigated. With the increasing proportion of illitic clay, the main crystalline phase of ceramic samples changed from akermanite to Fe-bearing diopside. Moreover, the minor crystalline phases changed from perovskite and spinel to anorthite and titanite. The proportion of illitic clay was linearly related to the amorphous phase content. The dense microstructure comprised concentrated short-columnar and granular grains with a few isolated pores, whereas plate-like grains destroyed their denseness. An appropriate proportion of illitic clay helped to improve the physical properties, increase the high-temperature viscosity and reduce the deformation of the ceramics. The optimal proportion of illitic clay was 30%, and the prepared ceramic sample had a dense microstructure and excellent physical properties. Its bulk density was 2.82 g/cm3, bending strength was 62.17 MPa, and water absorption was 0.21%.
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Xueting, Liu. « Research on the preparation of a new type steel slag ceramics with steel slag and coal ash ». E3S Web of Conferences 198 (2020) : 01031. http://dx.doi.org/10.1051/e3sconf/202019801031.
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Along with our rapid development of steel industry, the output of steel slag was increasing these yesrs. But all kinds of industrial waste emissions increased rapidly too. Application of good solid wastes such as coal ash and mineral powder is under low utilization rate, a large number of accumulation is serious threat to the environment and other issues. Therefore, research on the preparation of a new type steel slag ceramics with steel slag and coal ash is important to improve the industrial solid waste resource utilization. In this paper, the new type of steel slag ceramics was prepared by industrial waste steel slag and industrial waste coal ash, and the new type of steel slag ceramics was prepared by appropriate sintering process system. Meanwhile, the performance indexes of ceramic bricks were tested to determine the influence of different factors on the performance of the new type of steel slag ceramics.
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Solonina, V. A., et M. D. Butakova. « Producing ceramic wall material using industrial waste ». IOP Conference Series : Earth and Environmental Science 1061, no 1 (1 juillet 2022) : 012048. http://dx.doi.org/10.1088/1755-1315/1061/1/012048.
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Abstract Environmental motivation in industrial waste processing should be prioritized in national social development programs. Technogenic materials accumulate near industrial enterprises and significantly complicate the environmental situation in the regions. The article considers the possibility of utilizing technogenic waste (slag) from the Elektrostal Tyumen metallurgical plant. We propose including finely-ground slag in the raw charge for the production of wall ceramics, which can assist in reducing the plasticity number of the Kyshtyrlinsky clay deposit of Tyumen and its sintering temperature. The results obtained indicate an increase in the strength of the ceramic by 23.8%. A burn-out additive (wood flour) is additionally introduced into the raw material mixture to improve the thermal characteristics of ceramic products.
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Wang, Enyu, Zhongtian Shi, Miaomiao Chen, Shiqian Tang, Xiangyu Zhang et Wei Zhang. « Investigation of effective thermal conductivity of SiC foam ceramics with various pore densities ». Open Physics 20, no 1 (1 janvier 2022) : 58–65. http://dx.doi.org/10.1515/phys-2022-0003.
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Abstract SiC foam ceramics are extensively used in numerous industrial applications that require high-temperature conditions. They can be used as thermal insulation, structural catalyst supports and energy storage materials. In this article, effective thermal conductivity of SiC foam ceramics at high temperature is studied by steady plane heat source method. This research aims to investigate the variations of effective thermal conductivity with pore density, stacking thickness, heat source temperature, and pore arrangement structure of foam ceramics. By a comparison of effective thermal conductivities of various pore density ceramic sheets, the experimental results show that the effective thermal conductivity of foam ceramics decreases with the increase of the pore density and stacking thickness. The effective thermal conductivity of the foam ceramics increases significantly when the heat source temperature is more than 200°C. For modular SiC foam ceramics, increasing the average pore density and sudden change of the pore density between ceramic sheets are not conducive to the increase of the effective thermal conductivity.
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Vitkalova, Irina, Anastasiya Torlova, Evgeniy Pikalov et Oleg Selivanov. « Industrial waste utilization in the panels production for high buildings facade and socle facing ». E3S Web of Conferences 33 (2018) : 02062. http://dx.doi.org/10.1051/e3sconf/20183302062.
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The research presents comprehensive utilization of such industrial waste as galvanic sludge, broken window glass as functional additives for producing ceramics for facade and socle paneling in high-rise construction. The basic charge component is low-plasticity clay, which does not allow producing high-quality products if used without any functional additives. The application of the mentioned above components broadens the resource base, reduces production cost and the mass of the products in comparison with the currently used facing ceramics. The decrease of product mass helps to reduce the load on the basement and to use ceramic material in high-rise construction more effectively. Additional advantage of the developed composition is the reducing of production energy intensity due to comparatively low pressing pressure and firing temperature thus reducing the overall production cost. The research demonstrates the experimental results of determining density, compressive strength, water absorption, porosity and frost resistance of the produced ceramic material. These characteristics prove that the material can be applied for high buildings outdoor paneling. Additional research results prove ecologic safety of the produced ceramic material.
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SOLONINA, VALENTINA A. « POSSIBILITIES OF USING INDUSTRIAL WASTE TO PRODUCE STRUCTURAL CERAMICS ». Architecture, Construction, Transport, no 4(102) (2022) : 73–81. http://dx.doi.org/10.31660/2782-232x-2022-4-73-81.
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Тhe article considers the possibility of using a waste in the form of slag from the metallurgic plant "Electrostal of Tyumen". A fine-grained slag is offered to be introduced into the composition of a raw charge for making the wall ceramics. The presented experimental data demonstrate the effect of slag as a leaner additive and flux at the same time, which allows reducing the plasticity index of clay in Kyshtyrlynskoye deposit in Tyumen and the temperature of its sintering. The results show an increase in the strength of ceramic shard by 23.8 %. A combustible additive (wood flour) is introduced in additiontothecompositionoftherawmixtoimprove the heat engineering characteristics of ceramic products. The strength of the ceramic shards with metallurgic slag and combustible additive is 63.4 % more than strength of samples with combustible additive at firing temperature 950 ºС.
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Qiang, Gu, et Akós Hutter. « Inspiration from the History of Chinese and Hungarian Building Ceramics Manufacturing Technology to Industrial Smoke Control ». Tobacco Regulatory Science 7, no 5 (30 septembre 2021) : 2934–37. http://dx.doi.org/10.18001/trs.7.5.1.62.
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Chinese and Hungarian architectural ceramics manufacturing technology is of the same origin, and both have certain influence in the world. In particular, Zsolnay, a Hungarian architectural ceramics brand, has made breakthroughs and innovations in the production process of products in the inheritance of more than 100 years, forming a unique architectural ceramics manufacturing technology. It can effectively reduce the concentration of flue gas particulate matter and sulfur dioxide produced in production. The historical experience of the development of building ceramic manufacturing technology in China and Hungary is of enlightenment to the current industrial smoke control.
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Yasui, Kentaro, Koya Sasaki, Naoya Ikeda et Hiroyuki Kinoshita. « Dye Adsorbent Materials Based on Porous Ceramics from Glass Fiber-Reinforced Plastic and Clay ». Applied Sciences 9, no 8 (16 avril 2019) : 1574. http://dx.doi.org/10.3390/app9081574.
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We investigated the use of waste glass fiber-reinforced plastic (GFRP) to remove dye from industrial wastewater. The dye adsorbent material, based on GFRP/clay ceramics, was produced by mixing crushed GFRP with clay and firing the resulting mixture. Several types of ceramics were produced by adjusting the mixing ratio of clay, crushed 40% GF/GFRP, and firing atmosphere. Adsorption tests with methylene blue (MB) dye were performed by mixing the ceramics into an MB solution while controlling the stirring speed and measuring the decrease in MB dye concentration over time. These results showed that GFRP/clay ceramics reductively fired at 1073 K had a higher MB dye adsorption ability than that of the clay ceramic. The MB dye absorptivity of the reductively fired ceramics increased as we increased the mixing ratio of GFRP. We attribute this result to the high plastic carbide content in the ceramic, which has excellent dye absorbability. Furthermore, these particles had a comparatively high specific surface area and porosity.
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Sciancalepore, Corrado, Tiziano Manfredini et Federica Bondioli. « Antibacterial and Self-Cleaning Coatings for Silicate Ceramics : A Review ». Advances in Science and Technology 92 (octobre 2014) : 90–99. http://dx.doi.org/10.4028/www.scientific.net/ast.92.90.
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The development of advanced materials is increasingly leading to integration of functions into materials and components. This drive in technological innovation is strongly felt in many traditional fields, like textiles or ceramics. Over the last twenty years, the so-called "traditional" ceramics industry for tile production has undergone a profound technological reorganization, both in production technologies and automation of the different production phases, but new products and possible new applications are still needed, thereby opening up new markets. In this paper a critical review of the industrial and scientific effort to obtain antibacterial and self-cleaning coating for ceramic tiles is reported. The main patents and scientific papers in the field are reported as well as some final results obtained by the authors on the evaluation of the durability of photocatalytic coating deposited on industrial ceramic tiles.
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Hastenreiter, L. G., J. C. Santos, S. P. Taguchi, L. A. Borges Jr., Gabrielly Sandrine de Oliveira et F. W. P. Sofiati. « Study of Ceramic Coating Processing Using Dimension Stones Wastes in the Composition of the Glaze ». Materials Science Forum 899 (juillet 2017) : 406–11. http://dx.doi.org/10.4028/www.scientific.net/msf.899.406.
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The objective of this work was to produce red ceramic glazed with dimension stone waste. The clay and residue were characterized for crystalline phases (XRD), chemical analysis (XRF) and particle size. Additives were added to the residue in order to reduce the melting point of 1280 oC to 980 °C, because 1100 °C is the temperature typically used in industrial sintering of coating ceramics. It was studied different compositions of glaze and analyzed its viscosity. The engobe and the glaze were applied on the red ceramic, previously pressed with 100x100x5 mm3 size, and sintered at 1100 oC for 1 h, in order to obtain the ceramic coating. These ceramics were analyzed for abrasion resistance, water absorption and chemical attack, according to NBR 13.818/1997, being classified as PEI 1, indicate for use in residential bathrooms and bedrooms without doors outwards, showing the potential use of dimension stone waste for flooring ceramics, mitigating environmental impacts in mineral industry.
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Mardegan Louzada, Thais, Alline Sardinha Cordeiro Morais, Carlos Mauricio Fontes Vieira, Veronica Scarpini Candido et Sergio Neves Monteiro. « Microstructural Analysis of Clayey Ceramics Incorporated with Fluorescent Lamp Glass Waste ». Materials Science Forum 820 (juin 2015) : 468–73. http://dx.doi.org/10.4028/www.scientific.net/msf.820.468.
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The recycling of industrial wastes has become a worldwide practice owing to environmental and economical advantages. In the case of waste addition to clayey ceramics for civil construction, this sustainable practice may also bring technical benefits. Fluorescent lamps, today replacing incandescent lamps, generate typical glass waste that can improve the properties of clayey ceramics. The fluxing behavior of the glass waste contributes to the ceramic sintering mechanisms by reducing the porosity. In the present work, the effect of incorporation of 30 wt% of Hg-cleaned fluorescent lamps glass waste was investigated by means of microstructural analysis. Waste incorporated clayey ceramics, fired at 850 and 1100°C were analyzed by optical and scanning electron microscopy as well as by X-ray diffraction. The results revealed the microstructural mechanism responsible for the improvement of the ceramic properties.
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RAKHIMOV , RUSTAM, VLADIMIR PANKOV , VLADIMIR YERMAKOV , YULYAN HAIDUK , MUROD RAKHIMOV et DILMUROD MUKHTOROV . « DEVELOPMENT OF A METHOD FOR OBTAINING CERAMIC NANOCOMPOSITES USING SOL-GEL TECHNOLOGY ELEMENTS TO CREATE INCLUSIONS OF AMORPHOUS PHASES WITH A COMPOSITION SIMILAR TO THE TARGET CRYSTALLINE CERAMIC MATRIX ». Computational Nanotechnology 9, no 3 (28 septembre 2022) : 60–67. http://dx.doi.org/10.33693/2313-223x-2022-9-3-60-67.
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A method has been developed for obtaining ceramic nanocomposites using elements of sol-gel technology to create inclusions of amorphous phases with a composition similar to the target crystalline ceramic matrix synthesized in a solar furnace. It is shown that when the resulting material is activated by pulses generated by functional ceramics, the properties of this material approach those of the prototype. The use of this development can lead to the possibility of producing a film-ceramic composite in industrial volumes and at a low cost.
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P. Papilaya, Samuel. « Utilization of Ceramic Waste as Coarse Aggregate and the effect on Concrete Compressive Strength ». International Journal of Advanced Engineering Research and Science 10, no 2 (2023) : 048–63. http://dx.doi.org/10.22161/ijaers.102.5.
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In accordance with the development of knowledge, ceramics are all items made from non-metallic inorganic materials with silicate rock soil materials whose manufacturing process is accompanied by a combustion process at high temperatures. Seeing the potential for clay soil in Indonesia is very large, of course, many industrial activities grow so that they can provide benefits for humans, but apart from the benefits there are also impacts from industrial activities. One of the impacts of industrial activities is the waste, there are industrial wastes that can damage the environment or are environmentally friendly. The method used in this study is an experimental method, namely an experiment that aims to investigate the relationship between the compressive strength of normal concrete and concrete that uses ceramic shards as a filler material for a portion of the weight of coarse aggregate. The test objects made in this experiment were 9 samples in the form of concrete cylinders with a size of 15 cm x 30 cm which would later be tested for the compressive strength of concrete using SNI 03-2834-2000 guidelines. The research objectives were to obtain the compressive strength of concrete using ceramic waste materials as an additional coarse aggregate and to obtain the results of a comparison of normal concrete compressive strength with the compressive strength of concrete using ceramic waste materials. The compressive strength of concrete using ceramic waste material as an additional coarse aggregate with a percentage of 15% and 20% ceramic waste is as follows: Trial mix with 15% ceramic gives a compressive strength of 23.91 MPa and trial mix with ceramic 20% days gives a compressive strength of 23 .89 MPa. From the results of this test the percentage of ceramic 20% has a greater compressive strength compared to the percentage of ceramic 15% and the comparison of the compressive strength values of normal concrete and concrete using ceramics proves that the compressive strength of concrete is greater than normal concrete. big. It can be seen from the compressive strength of concrete from 0% to 15% which has an increase of 0.59 MPa and the compressive strength of slate from 0% to 20% has an increase of 0.98 MPa.
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Silvestre, J., N. Silvestre et J. de Brito. « An Overview on the Improvement of Mechanical Properties of Ceramics Nanocomposites ». Journal of Nanomaterials 2015 (2015) : 1–13. http://dx.doi.org/10.1155/2015/106494.
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Due to their prominent properties (mechanical, stiffness, strength, thermal stability), ceramic composite materials (CMC) have been widely applied in automotive, industrial and aerospace engineering, as well as in biomedical and electronic devices. Because monolithic ceramics exhibit brittle behaviour and low electrical conductivity, CMCs have been greatly improved in the last decade. CMCs are produced from ceramic fibres embedded in a ceramic matrix, for which several ceramic materials (oxide or non-oxide) are used for the fibres and the matrix. Due to the large diversity of available fibres, the properties of CMCs can be adapted to achieve structural targets. They are especially valuable for structural components with demanding mechanical and thermal requirements. However, with the advent of nanoparticles in this century, the research interests in CMCs are now changing from classical reinforcement (e.g., microscale fibres) to new types of reinforcement at nanoscale. This review paper presents the current state of knowledge on processing and mechanical properties of a new generation of CMCs: Ceramics Nanocomposites (CNCs).
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Muenstermann, Simon, Rainer Telle, Frederik Knauf et Gerhard Hirt. « Semi-Solid Extrusion of Complex-Shaped Steel Rods Using Ceramic Dies ». Solid State Phenomena 141-143 (juillet 2008) : 243–48. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.243.
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Isothermal semi-solid extrusion experiments using steel grade X210CrW12 as work material were performed on an industrial forging machine. An improved and up-scaled tool design was applied, based on the concept of self-heating ceramic dies tested in previous laboratory-scale studies and allowing for die preheating temperatures of up to 1400°C. Steel rods of complex cross sectional geometry were formed at low extrusion forces. Shape accuracy of as-formed rods is accurate and metallurgical examination yields no evidence of liquid phase separation. With a view on the intended industrial implementation construction of ceramic tools has to be improved in order to avoid rupture of ceramic parts due to thermo-mechanically induced stresses and to benefit from the advantages inherent to ceramics in metal forming.
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Alisin, Valery V. « Improving the Tribological Properties of Ceramic Dies ». Key Engineering Materials 887 (mai 2021) : 339–44. http://dx.doi.org/10.4028/www.scientific.net/kem.887.339.
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The article is devoted to tribological studies of a ceramic composite with a zirconia-based die in order to replace carbide wire drawing dies with ceramic. Sliding friction was done according to the scheme finger-disk without lubrication and with lubrication. The wear rate and friction coefficients were determined, on the basis of which it is proposed to produce portage dies-blanks from zirconium ceramics. The influence of sintering temperature on the mechanical properties of ceramics, especially cracking resistance, was studied. The optimum sintering temperature was determined by the criterion of fracture toughness. The formation of defects after the final firing was investigated. It was found that sintering at a temperature of 1600 ° C is more promising. An trial batch of zirconium ceramic dies showed positive results in the process of drawing copper wire in industrial situations.
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Saleiro, G. T., et J. N. F. Holanda. « Processing of red ceramic using a fast-firing cycle ». Cerâmica 58, no 347 (septembre 2012) : 393–99. http://dx.doi.org/10.1590/s0366-69132012000300018.
Texte intégralRésumé :
This work reports on the processing of red ceramic for civil construction using fast-firing cycles. The firing cycle is an important variable in the processing of red ceramic materials, which contributes to a high consumption of energy. The red ceramic pieces were prepared by industrial extrusion and fired at firing temperatures varying from 700 ºC to 1100 ºC using different firing cycles (slow-firing cycle - 1º C/min and fast-firing cycle - 10 ºC/min and 20 °C/min). The technological properties (linear shrinkage, water absorption, apparent porosity, apparent density, and flexural strength) as function of the firing temperature and firing cycle are investigated. The development of the microstructure was followed by SEM/SEI. The results showed that fast-firing red ceramics exhibits technological properties and microstructure comparable to conventionally fired red ceramics, resulting in great advantages in energy saving.
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Do, Quang Minh, Thi Thuy Linh Nguyen, Vo Thi Ha Quyen Pham et Nguyen Hoc Thang. « The Novel Crystalline Glaze for Decoration of Ceramic Pottery ». Materials Science Forum 987 (avril 2020) : 165–70. http://dx.doi.org/10.4028/www.scientific.net/msf.987.165.
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The ceramic glaze is a glass layer with an amorphous structure. Crystalline glazes are special glazes used to decorate ceramic products. It is based on the research results, the authors proposed a novel crystalline glaze from titanium frit (denoted by FV090/540) for pottery and ceramics with the heating temperature at 1200°C. The heating temperature for the crystallization of glaze was determined by differential thermal analysis (DTA). This study aimed to synthesis willemite crystals (Zn2SiO4) in pottery and ceramics. These crystals were detected and identified using X–ray diffraction (XRD), optical microscope (OM), and scanning electron microscope (SEM). The chemical composition of the samples was analyzed by X-ray fluorescence (XRF). From the results of experiments, the authors carried out decorating on industrial ceramic pottery products using this novel crystalline glaze and adjusted the required technological parameters.
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Schenk, B. « Ceramic Turbine Engine Demonstration Project : A Summary Report ». Journal of Engineering for Gas Turbines and Power 124, no 3 (19 juin 2002) : 617–26. http://dx.doi.org/10.1115/1.1417983.
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Honeywell Engines, Systems & Services has successfully addressed critical concerns that are slowing commercialization of structural ceramics in gas turbines. The U.S. Department of Energy (DoE) sponsored Ceramic Turbine Engine Demonstration Project (CTEDP) had the mission of advancing ceramic gas turbine component technology toward commercialization. The thrust of the program was to “bridge the gap” between ceramics in the laboratory and near-term commercial heat engine applications. Most of this mission has been achieved. The 331-200[CT] auxiliary power unit (APU) test bed featured ceramic first-stage nozzles and blades. Fabrication of ceramic components provided manufacturing process demonstration scale-up to the minimum levels needed for commercial viability. Through this program, design methods refinement and the development of new design methods unique to ceramic turbine components have been supported and validated in rig and development engine testing. Over 6800 hours of on-site endurance tests demonstrated component reliability. Additional field testing in APUs onboard commercial aircraft and stationary industrial engines has been initiated and will continue beyond completion of this program.
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Tulegenov, Аbylai К., et Saken Z. Razdykov. « Ортағасырлық Қастек қаласы керамикасының зерттелу тарихы ». BULLETIN of the L.N. Gumilyov Eurasian National University. Historical sciences. Philosophy. Religion Series 138, no 1 (2022) : 109–25. http://dx.doi.org/10.32523/2616-7255-2022-138-1-109-125.
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The article discusses the stages of archaeological excavations of the medieval town of Kastek, located 2.5 km south of the village of Kastek in the Zhambyl district of the Almaty region, at the foot of the Kholod Tobe mountain, and the history of the study of the found ceramic products. Excavations of the territory of the medieval city were carried out comprehensively from 2011 to 2020. During the annual excavations, numerous types of ceramic products were discovered, thanks to which a view of the medieval city opens. Ceramics is the main source of periodization of the cultural layer of medieval cities and settlements. In addition, pottery production and its products determine the high skill of artisans. The found ceramic products are determined by 2 stages: the end of the VII-X century; X-the beginning of the XIII century. In the manufacture of ceramic products, local raw materials were used – natural additives (clay, feldspar, quartz). The collection of ceramic products found in the medieval town of Kastek is so well preserved that it allows you to group them, classify them depending on the features of use, divide them into types and forms. The use of the comparative-analytical method in the study of a group of ceramic products allows us to achieve the goal of the research article. Archaeologist A. Nurzhanov, conducted comprehensive research work related to the ceramics of the medieval city of Kastek. Despite more than 10 years of research, many scientific articles have been published related to the ceramics found in the city. The information contained in these scientific articles refers to this research article, the degree of its study, and the characteristic situation are discussed. Ceramic products are the only source that answers many questions when studying cities. Therefore, the study of ceramics remains a very important and relevant issue. Therefore, readers will be presented with the course of archaeological excavations of the medieval city of Kastek, the types, and images of the found ceramic products
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Pablos, A., P. Miranzo, M. I. Osendi, J. C. Romero, P. Crespo, L. Gargalo et M. A. Bengoechea. « Estudio de las propiedades mecánicas de pavimentos cerámicos en crudo ». Boletín de la Sociedad Española de Cerámica y Vidrio 39, no 5 (30 octobre 2000) : 631–34. http://dx.doi.org/10.3989/cyv.2000.v39.i5.781.
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Calbo, J., M. Llusar, M. A. Tena, M. Vicente et G. Monrós. « Caracterización medioambiental de residuos de pigmentos cerámicos ». Boletín de la Sociedad Española de Cerámica y Vidrio 41, no 3 (30 juin 2002) : 311–17. http://dx.doi.org/10.3989/cyv.2002.v41.i3.677.
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Al Bakri, Abdullah Mohd Mustafa, M. N. Norazian, M. Mohamed, H. Kamarudin, C. M. Ruzaidi et J. Liyana. « Strength of Concrete with Ceramic Waste and Quarry Dust as Aggregates ». Applied Mechanics and Materials 421 (septembre 2013) : 390–94. http://dx.doi.org/10.4028/www.scientific.net/amm.421.390.
Texte intégralRésumé :
This research focuses on a study of the strength of concrete with ceramic waste as coarse aggregate and quarry dust as fine aggregate. The sources of ceramic waste and quarry dust are obtained from the industrial in Malaysia. Presently, in ceramics industries the production goes as waste, which is not under going the recycle process yet. In this study an attempt has been made to find the suitability of the ceramic industrial wastes and quarry dust as a possible replacement for conventional crushed stone coarse and fine aggregate. Experiment were carried out to determine the strength of concrete with ceramic waste coarse aggregate and quarry dust fine aggregate to compare them with the conventional concrete made (with crushed stone coarse aggregate). From the results show that compressive strength of concrete with quarry dust as aggregates is the highest with 30.82 MPa with density 2251.85 kg/m3. This show, ceramic waste and quarry dust can be alternative aggregate for comparable properties.
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Sing, Swee Leong, Wai Yee Yeong, Florencia Edith Wiria, Bee Yen Tay, Ziqiang Zhao, Lin Zhao, Zhiling Tian et Shoufeng Yang. « Direct selective laser sintering and melting of ceramics : a review ». Rapid Prototyping Journal 23, no 3 (18 avril 2017) : 611–23. http://dx.doi.org/10.1108/rpj-11-2015-0178.
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Purpose This paper aims to provide a review on the process of additive manufacturing of ceramic materials, focusing on partial and full melting of ceramic powder by a high-energy laser beam without the use of binders. Design/methodology/approach Selective laser sintering or melting (SLS/SLM) techniques are first introduced, followed by analysis of results from silica (SiO2), zirconia (ZrO2) and ceramic-reinforced metal matrix composites processed by direct laser sintering and melting. Findings At the current state of technology, it is still a challenge to fabricate dense ceramic components directly using SLS/SLM. Critical challenges encountered during direct laser melting of ceramic will be discussed, including deposition of ceramic powder layer, interaction between laser and powder particles, dynamic melting and consolidation mechanism of the process and the presence of residual stresses in ceramics processed via SLS/SLM. Originality/value Despite the challenges, SLS/SLM still has the potential in fabrication of ceramics. Additional research is needed to understand and establish the optimal interaction between the laser beam and ceramic powder bed for full density part fabrication. Looking into the future, other melting-based techniques for ceramic and composites are presented, along with their potential applications.
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Fedotov, Anatoliy V., Aleksey S. Dorokhov et Dmitriy A. Kovalev. « PROSPECTS FOR THE USE OF CERAMIC MATERIALS FOR THE NEEDS OF THE AGRO-INDUSTRIAL COMPLEX ». Tekhnicheskiy servis mashin 2, no 143 (juin 2021) : 91–102. http://dx.doi.org/10.22314/2618-8287-2021-59-2-91-102.
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As a result of poor quality, parts of tillage equipment have to be replaced 3-7 times a year. One of the reasons is the lack of attention to the possibility of using technical ceramics in agricultural engineering to improve the wear resistance and durability of machine parts. (Research purpose) The research purpose is in assessing the state of research and prospects for the use of ceramic materials in the Russian Federation for the needs of the agro- industrial complex. (Materials and methods) For the experiments has been used nanostructured boehmite obtained by hydrothermal synthesis to improve the properties of materials and coatings. The crack resistance was determined by the indentation method, and the methane content in the biogas was determined by the chromatographic method. (Results and discussion) The article presents the results of the use of aluminum oxide ceramics for the manufacture of parts of tillage equipment, which allows increasing the resource of parts for processing loamy soils by 2.4-4.5 times. The creation of nanocomposites is promising to increase the strength, wear resistance and crack resistance of the material. In the composition of the non-stick coating, the addition of boehmite increases the abrasion strength of the coating and the compressive strength of the samples by 2.2-2.7 times, and improves the quality of casting. The use of highly porous ceramic materials in the gating system helps to reduce waste, reduce production costs, and improve the quality of foundry products. (Conclusions) Ceramic materials due to their high hardness, wear resistance and corrosion resistance are becoming promising for use in the agro-industrial complex. The widespread use of modern ceramic materials as parts of tillage equipment, non-stick coatings and for the filtration of melts will improve the quality of casting, the durability of products, and reduce the cost of their production. Positive results on wastewater treatment with the use of highly porous ceramics allow us to consider it an innovative material for such purposes and it is advisable to continue research in this direction.
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Ohhashi, I., et S. Arakawa. « Development of 300 kW Class Ceramic Gas Turbine (CGT303) ». Journal of Engineering for Gas Turbines and Power 117, no 4 (1 octobre 1995) : 777–82. http://dx.doi.org/10.1115/1.2815464.
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CGT303 is a two-shaft regenerative ceramic gas turbine with rotary heat exchangers for the purpose of mobile power generator. It is also widely adaptable for industrial machinery and construction machinery as well. The development program of CGT303 is funded by the New Energy and Industrial Technology Development Organization (NEDO). The maximum output power of 300 kW and thermal efficiency of 42 percent at TiT 1350°C are the objectives of this development. The high TiT requires all gas passage components to be made of ceramics that are designed appropriately to keep sufficient strength by using sophisticated computer analysis. Hot spin tests on ceramic turbine rotors and thermal shock tests on stationary ceramic components have been carried out to prove their strength. The paper covers the design concept of CGT303 and results of analysis.
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Karayannis, V. G., A. K. Moutsatsou, A. N. Baklavaridis, E. L. Katsika et A. E. Domopoulou. « Synergistic Sintering of Lignite Fly Ash and Steelmaking Residues towards Sustainable Compacted Ceramics ». Advances in Materials Science and Engineering 2017 (2017) : 1–8. http://dx.doi.org/10.1155/2017/1735268.
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The development of value-added ceramic materials deriving only from industrial by-products is particularly interesting from technological, economic, and environmental point of views. In this work, the synergistic sintering of ternary and binary mixtures of fly ash, steelmaking electric arc furnace dust, and ladle furnace slag for the synthesis of compacted ceramics is reported. The sintered specimens’ microstructure and mineralogical composition were characterized by SEM-EDS and XRD, respectively. Moreover, the shrinkage, apparent density, water absorption, and Vickers microhardness (HV) were investigated at different sintering temperatures and raw material compositions. The characterization of the sintered compacts revealed the successful consolidation of the ceramic microstructures. According to the experimental findings, the ceramics obtained from fly ash/steel dust mixtures exhibited enhanced properties compared to the other mixtures tested. Moreover, the processing temperature affected the final properties of the produced ceramics. Specifically, a 407% HV increase for EAFD and a 2221% increase for the FA-EAFD mixture were recorded, by increasing the sintering temperature from 1050 to 1150°C. Likewise, a 972% shrinkage increase for EAFD and a 577% shrinkage increase for the FA-EAFD mixture were recorded, by increasing the sintering temperature from 1050 to 1150°C. The research results aim at shedding more light on the development of sustainable sintered ceramics from secondary industrial resources towards circular economy.
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Liu, Bing Feng. « Properties and Manufacturing Method of Silicon Carbide Ceramic New Materials ». Applied Mechanics and Materials 416-417 (septembre 2013) : 1693–97. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.1693.
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Ceramic industry developed rapidly in recent years, a greater demand for new materials. SiC ceramics as one of candidate materials that a few suitable for use high-temperature structural parts, shows its unique advantages in the high temperature, thermal shock, corrosive and other harsh environments. Its high temperature performance and application potential has attracted people's attention, but its properties make it difficult sintering at atmospheric pressure, unable to meet the needs of industrial production. Pressure less sintering technology has become the key in its application promotion. As strong antioxidant activity, better abrasion resistance, hardness, thermal stability, high temperature strength, thermal expansion coefficient, thermal conductivity and thermal shock and great chemical resistance and other excellent characteristics, Silicon carbide ceramics are widely used in various fields. Based on the silicon carbide ceramic materialisms development process, characteristics, international research and proposed several status of sintering silicon carbide ceramic, and discuss its development trends.
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Teixeira, S. R., S. A. de Souza et M. A. L. Nobre. « Physical and mechanical properties of ceramics from clays of the west of S. Paulo State, Brazil ». Cerâmica 50, no 315 (septembre 2004) : 268–73. http://dx.doi.org/10.1590/s0366-69132004000300015.
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Clays and ceramics of interest to the structural ceramic industry were characterized. Some physical properties of ceramic masses formulated from artificial deposits exploited by the local industry were also analyzed. All materials investigated exhibit high contents of fine components (< 2 mum) and significant plasticity that is compatible with the presence of a great amount of clay minerals. Ceramic probes were prepared by dry pressing and fired at around 855 °C. Flexural strength, linear shrinkage, water absorption, apparent color and weight loss were measured. In addition, the industrial applications of these raw materials were reviewed and newest potential uses proposed.
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Xiang, Q. F., J. R. G. Evans, M. J. Edirisinghe et P. F. Blazdell. « Solid freeforming of ceramics using a drop-on-demand jet printer ». Proceedings of the Institution of Mechanical Engineers, Part B : Journal of Engineering Manufacture 211, no 3 (1 mars 1997) : 211–14. http://dx.doi.org/10.1243/0954405971516194.
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The formulation of a stabilized ceramic ink and the adaptation of a piezoelectric-activated drop- on-demand jet printer with a 65 mm nozzle for the direct solid freeforming of ceramics by multilayer jet printing is reported. The procedure has exciting implications for the miniaturization of ceramic circuits and for the fabrication of solid oxide fuel cells, ordered ceramic composites and small monolithic ceramic components of complex shape.
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Ramírez, Cristina, Manuel Belmonte, Pilar Miranzo et Maria Isabel Osendi. « Applications of Ceramic/Graphene Composites and Hybrids ». Materials 14, no 8 (20 avril 2021) : 2071. http://dx.doi.org/10.3390/ma14082071.
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Research activity on ceramic/graphene composites and hybrids has increased dramatically in the last decade. In this review, we provide an overview of recent contributions involving ceramics, graphene, and graphene-related materials (GRM, i.e., graphene oxide, reduced graphene oxide, and graphene nanoplatelets) with a primary focus on applications. We have adopted a broad scope of the term ceramics, therefore including some applications of GRM with certain metal oxides and cement-based matrices in the review. Applications of ceramic/graphene hybrids and composites cover many different areas, in particular, energy production and storage (batteries, supercapacitors, solar and fuel cells), energy harvesting, sensors and biosensors, electromagnetic interference shielding, biomaterials, thermal management (heat dissipation and heat conduction functions), engineering components, catalysts, etc. A section on ceramic/GRM composites processed by additive manufacturing methods is included due to their industrial potential and waste reduction capability. All these applications of ceramic/graphene composites and hybrids are listed and mentioned in the present review, ending with the authors’ outlook of those that seem most promising, based on the research efforts carried out in this field.
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Silva, L. M. S. e., R. S. Magalhães, W. C. Macedo, G. T. A. Santos, A. E. S. Albas et S. R. Teixeira. « Utilization of discarded foundry sand (DFS) and inorganic waste from cellulose and paper industry for the manufacture of glass-ceramic materials ». Cerâmica 66, no 380 (décembre 2020) : 413–20. http://dx.doi.org/10.1590/0366-69132020663802899.
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Abstract Recycling has been pointed out as an alternative to the disposal of waste materials in industrial landfills. In the present study, the transformation of residues (discarded foundry sand - DFS, grits, and lime mud) in glass-ceramic materials is shown. The glasses were obtained by the melting/cooling method. The precursor materials, glasses, and glass-ceramics were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), and differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA). The glassy materials were milled, pelleted, and thermally treated at the crystallization temperatures given by DSC data to obtain the glass-ceramics (885, 961, and 1090 ºC). The main formed phases were cristobalite, α-wollastonite (parawollastonite), and β-wollastonite (pseudowollastonite). The glass-ceramics showed very low water absorption and apparent porosity (0.26 to 0.88 wt% and 0.66 to 1.77 vol%, respectively). The results confirmed that the studied residues can be used as raw materials for the manufacture of vitreous and glass-ceramic materials.
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Mahmood, Muhammad, Alexandra Bănică, Carmen Ristoscu, Nicu Becherescu et Ion Mihăilescu. « Laser Coatings via State-of-the-Art Additive Manufacturing : A Review ». Coatings 11, no 3 (4 mars 2021) : 296. http://dx.doi.org/10.3390/coatings11030296.
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Ceramics and ceramic-reinforced metal matrix composites (CMMCs) demonstrate high wear resistance, excellent chemical inertness, and exceptional properties at elevated temperatures. These characteristics are suitable for their utilization in biomedical, aerospace, electronics, and other high-end engineering industries. The aforementioned performances make them difficult to fabricate via conventional manufacturing methods, requiring high costs and energy consumption. To overcome these issues, laser additive manufacturing (LAM) techniques, with high-power laser beams, were developed and extensively employed for processing ceramics and ceramic-reinforced CMMCs-based coatings. In respect to other LAM processes, laser melting deposition (LMD) excels in several aspects, such as high coating efficiency and lower labor cost. Nevertheless, difficulties such as poor bonding between coating and substrate, cracking, and reduced toughness are still encountered in some LMD coatings. In this article, we review recent developments in the LMD of ceramics and CMMCs-based coatings. Issues and solutions, along with development trends, are discussed and summarized in support of implementing this technology for current industrial use.
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Deng, Yi, Yang Zhou, Yuanyi Yang, Xiuyuan Shi, Kewei Zhang, Ping Zhang et Weizhong Yang. « Preparation and Coloration of Colored Ceramics Derived from the Vanadium-Titanium Slags ». Advances in Materials Science and Engineering 2018 (2018) : 1–8. http://dx.doi.org/10.1155/2018/5085031.
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Vanadium-titanium slag is a type of industrial solid waste from vanadium-titanium magnetite, and the resource utilization of vanadium-titanium slag is of great significance. The chemical composition of vanadium-titanium slag is similar to ceramic raw materials. Besides, the Fe, Ti, and Mn elements in vanadium-titanium slags possess strong color rendering ability. In the present study, we explored the influence of Fe, Ti, and Mn in vanadium-titanium slags on the coloration of ceramics. Besides, the crystal structures and chemical constituents of the sintered ceramics were studied by XRD, SEM, EDS, XPS, and ultraviolet-visible near-infrared spectrophotometer, and the color-rendering ability (L∗a∗b∗ values) of the ceramics was investigated. The results showed that the main crystal phases of the ceramics were quartz and anorthite. In addition, the color of the ceramics with the addition of vanadium-titanium slags was significantly affected by Fe and Mn ions, which decreased their L∗ and a∗ values. Meanwhile, Ti ion alone had no apparent coloring effect but strengthened the coloring effects of Fe and Mn ions. This work could provide the feasibility for preparation of colored ceramics based on vanadium-titanium slag, which could be used in the fields of high-value added building decoration, infrared-emission ceramic, and artwork.
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Silva Neto, L. P., J. O. Rossi et A. R. Silva. « Applications of PZT Dielectric Ceramics in High-Energy Storage Systems ». Materials Science Forum 727-728 (août 2012) : 505–10. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.505.
Texte intégralRésumé :
The barium and strontium titanate (BST) ceramics have been used with great success as excellent dielectrics in the construction of high voltage (HV) commercial ceramic capacitors with reduced dimensions because of their high dielectric constant. However, the main point of this paper is to investigate other type of ceramic known as PZT (Lead Zirconate Titanate) normally used as piezoelectric sensors in industrial applications. The idea herein is to use the PZT ceramics as HV dielectrics for applications in high-energy storage systems by de-poling their piezoelectric properties in order to avoid dielectric damage and losses at high frequencies. For this, de-poled PZT-4 ceramic samples (30 mm × 2 mm) were submitted to HV tests, in which their dielectric breakdown strength and dielectric constant variation with the applied voltage were assessed. These results obtained confirmed the use of PZT in applications that require reasonable dielectric constant stability (< 15 %) with voltage and HV dielectric breakdown (40 kV/cm) for compact high-energy storage devices.
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Hildebrand, Gerhard, Johanna C. Sänger, Uwe Schirmer, Willi Mantei, Yannick Dupuis, Ruth Houbertz et Klaus Liefeith. « Process Development for Additive Manufacturing of Alumina Toughened Zirconia for 3D Structures by Means of Two-Photon Absorption Technique ». Ceramics 4, no 2 (17 mai 2021) : 224–39. http://dx.doi.org/10.3390/ceramics4020017.
Texte intégralRésumé :
Additive manufacturing is well established for plastics and metals, and it gets more and more implemented in a variety of industrial processes. Beside these well-established material platforms, additive manufacturing processes are highly interesting for ceramics, especially regarding resource conservation and for the production of complex three-dimensional shapes and structures with specific feature sizes in the µm and mm range with high accuracy. The usage of ceramics in 3D printing is, however, just at the beginning of a technical implementation in a continuously and fast rising field of research and development. The flexible fabrication of highly complex and precise 3D structures by means of light-induced photopolymerization that are difficult to realize using traditional ceramic fabrication methods such as casting and machining is of high importance. Generally, slurry-based ceramic 3D printing technologies involve liquid or semi-liquid polymeric systems dispersed with ceramic particles as feedstock (inks or pastes), depending on the solid loading and viscosity of the system. This paper includes all types of photo-curable polymer-ceramic-mixtures (feedstock), while demonstrating our own work on 3D printed alumina toughened zirconia based ceramic slurries with light induced polymerization on the basis of two-photon absorption (TPA) for the first time. As a proven exemplary on cuboids with varying edge length and double pyramids in the µm-range we state that real 3D micro-stereolithographic fabrication of ceramic products will be generally possible in the near future by means of TPA. This technology enables the fabrication of 3D structures with high accuracy in comparison to ceramic technologies that apply single-photon excitation. In sum, our work is intended to contribute to the fundamental development of this technology for the representation of oxide-ceramic components (proof-of-principle) and helps to exploit the high potential of additive processes in the field of bio-ceramics in the medium to long-term future.