Journal articles: 'Wall ceramic'

1

Chao, Yang. "Study on the Properties of SiC/Mullite Porous Ceramics Based on ANSYS Numerical Simulation." Applied Mechanics and Materials 608-609 (October 2014): 976–80. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.976.

Full text

Abstract:

In this paper, we use foam injection coagulation method to fabricate SiC/mullite porous ceramic with porosity 38-80%. In order to study the performance of the ceramic, we use the principle of cavity to establish the fourteen surfaces model of the SiC/ mullite porous ceramics, and use the ANSYS finite element simulation software to simulate the performance of ceramic, and do simulation on the mechanical properties of the ceramics. In order to study the influence of different wall thickness and curvature on the properties of ceramics, we calculate the structure stress distribution of fourteen surfaces when wall thickness is 0.4 and 0.5mm. When the wall thickness is 0.2mm, we study the structure stress distribution with radius 0.1mm and 0.2mm. So we obtain the influence of wall thickness and curvature radius on the properties of porous ceramics. It provides valuable reference data for the study on porous ceramics.

APA, Harvard, Vancouver, ISO, and other styles

2

Perovskaya, Kseniya, Daria Petrina, Evgeniy Pikalov, and Oleg Selivanov. "Polymer waste as a combustible additive for wall ceramics production." E3S Web of Conferences 91 (2019): 04007. http://dx.doi.org/10.1051/e3sconf/20199104007.

Full text

Abstract:

The research presents the experimental results devoted to the charge composition development for the production of wall ceramic products, based on low plasticity clay using additives. One of the additives is polymer waste in the amount of 15 wt. %, in particular it is unplasticized polyvinyl chloride used as a combustible additive for increasing ceramics porosity thus decreasing its density and consequently the load on the basement when the walls are constructed. Besides it decreases thermal conductivity and improves energy efficiency of developed wall ceramics application. Boric acid is a second additive used as a fuse thus reducing the temperature of ceramics liquid-phase sintering and forming a vitreous phase, which increases the strength characteristics and reduces water absorption, and therefore increases the product frost resistance. However the vitreous phase amount is insignificant and the products still are characterized by porosity sufficient for density and thermal conductivity reduction up to the level of conditionally effective thermal performance. Thus the application of the developed wall ceramics facilitate the production of energy effective products, which can be used for multi-layers walls construction providing modern thermal engineering standards and rational consumption of building materials. Herewith the developed materials properties correspond to the requirements of solid ceramic bricks used in Russian climatic conditions and help to combine the functions of bearing, heat-insulating and partly facing layers to a certain extend thus expanding their application.

APA, Harvard, Vancouver, ISO, and other styles

3

Guryeva, Viktoriya A., Aleksandr V. Doroshin, and Viktor V. Dubineckij. "Sludge of the Fuel-Energy and Oil-Producing Complex in the Production of Wall Ceramic Products." Materials Science Forum 945 (February 2019): 1036–42. http://dx.doi.org/10.4028/www.scientific.net/msf.945.1036.

Full text

Abstract:

The experience of using slime wastes in the production of wall ceramic bricks is considered. The results of the investigation of clayey raw materials in the deposits of the Western Orenburg region and technogenic wastes of the fuel-energy and oil-producing complex are analyzed with an analysis of their effect on the properties of wall ceramics: density, strength, and water absorption. Based on the results of the research, optimal compositions were developed using ash and slag wastes in a composition with aluminosilicate clay raw material - loam. The influence of drill cuttings with an increased content of calcium oxide on the composition and physical and mechanical properties of wall ceramics, the effect of a composition of low-grade local clay raw materials and drill cuttings on the formation of the structure and properties of ceramic materials is shown. The analysis of the volumes of formation of ash-and-slag wastes and drill cuttings is given, which makes it possible to introduce technogenic wastes into secondary production and to expand the mineral and raw materials base for the production of ceramic bricks.

APA, Harvard, Vancouver, ISO, and other styles

4

Tan, Xiaoli, Hui He, and Jian-Ku Shang. "In situ Transmission Electron Microscopy Studies of Electric-field-induced Phenomena in Ferroelectrics." Journal of Materials Research 20, no. 7 (July 1, 2005): 1641–53. http://dx.doi.org/10.1557/jmr.2005.0213.

Full text

Abstract:

High electric fields were delivered to specimens during imaging in the transmission electron microscopy (TEM) chamber to reveal details of electric field-induced phenomena in ferroelectric oxides. These include the polarization switching in nanometer-sized ferroelectric domains and the grain boundary cavitation in a commercial lead zirconate titanate (PZT) polycrystalline ceramic, the domain wall fracture in a Pb(Mg1/3Nb2/3)O3–PbTiO3 single crystal, and the transformation of incommensurate modulations in Pb0.99Nb0.02[(Zr1−xSnx)1−yTiy]0.98O3 (PZST100x/100y/2) polycrystalline ceramics. In the PZT ceramic, a cavitation process was uncovered for the electric field-induced intergranular fracture. In the ferroelectric single crystal, a preexisting crack was observed to deflect and to follow a 90° domain wall, indicating the presence of severe incompatible piezoelectric strains at thedomain wall. In the antiferroelectric PZST ceramics, the electric field-induced antiferroelectric-to-ferroelectric phase transformation was accompanied with the disappearance of incommensurate modulations.

APA, Harvard, Vancouver, ISO, and other styles

5

Bołtryk, Michal, Vadim Nikitin, and Beata Backiel-Brzozowska. "INFLUENCE OF SOME TECHNOLOGICAL FACTORS UPON WALL CERAMICS FROST RESISTANCE." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 10, no. 4 (December 31, 2004): 249–53. http://dx.doi.org/10.3846/13923730.2004.9636316.

Full text

Abstract:

A polynomial model, which enables evaluation of the influence of amount and graining of sand in a ceramic mix and maximum temperature and duration of burning upon ceramics frost resistance, constructed on the basis of experimental results is presented in this work. During the experiment the mass loss of ceramic specimens was measured. Experimental results were prepared for further statistical analysis with regard to linear summing of mass losses. Statistical evaluation of the quality of the constructed model and physical interpretation of tested factors were made. In addition, the authors presented the results of the samples bulking investigation in comparison with the results of frost-resistance test. Also the correlation of the results of both investigations was checked.

APA, Harvard, Vancouver, ISO, and other styles

6

Volosatova, K. A., and V. A. Shamanov. "Ceramic Mass Modifiers for the Production of Wall Ceramic Products." Ecology and Industry of Russia 25, no. 11 (November 16, 2021): 54–60. http://dx.doi.org/10.18412/1816-0395-2021-11-54-60.

Full text

Abstract:

Modern methods of improving the characteristics of ceramic products by introducing modifying additives based on various industrial wastes into the composition of the ceramic mass are considered. The compositions of ceramic masses and some features of the technology of manufacturing ceramic products using industrial waste are described. A diagram for the distribution of wastes from various industries (modifiers of the ceramic mass) according to the main type of action and predominant oxides is proposed.

APA, Harvard, Vancouver, ISO, and other styles

7

Karlík, Štěpán, Miloš Lavický, and Jan Pěnčík. "Analysis of Unreinforced Ceramic Wall Panels in the Mounting State." Applied Mechanics and Materials 861 (December 2016): 48–55. http://dx.doi.org/10.4028/www.scientific.net/amm.861.48.

Full text

Abstract:

Properties of building materials used for the construction of surrounding structures significantly contribute to creating a healthy and comfortable microclimate inside the rooms. Ceramics belong among materials which exhibit very suitable properties for the formation of the healthy environment. It is also one of the reasons that the fired clay structures remain popular among builders and that recovery of ceramic prefabrication can be seen in the Czech Republic. The important step towards rediscovering the benefits of the prefabricated ceramic elements is forthcoming production of unreinforced ceramic wall panels made of fired clay masonry units with tongue and groove, connected in the bed joints by two-component adhesives. Conventional analytical model for vertical loads is used in the operating state. However, in the transport and mounting state it is a structure stressed by bending in its own plane. This paper is focused on the issue of load-bearing capacity of structures with masonry units cross-sections that are not filled in head joints and therefore are unable to transfer either tensile or compressive stresses. On the segment of the wall panel is performed numerical model analysis using the finite element method in the computing program ANSYS and comparison of this analysis results with the results of the experimental tests.

APA, Harvard, Vancouver, ISO, and other styles

8

Chen, Chen Yu, and Ko Yi Huang. "A Study on the Deterioration of External Wall Tiles on RC Buildings in Taiwan." Applied Mechanics and Materials 479-480 (December 2013): 1105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.1105.

Full text

Abstract:

It’s very common in Taiwan to use ceramic tiles as an external wall material. Even the nature of ceramic tile is stable, the deterioration such as chaps and peeling still occur on external walls, which should face the tough conditions like sunshine, raining, etc. In this study, the conditions of deterioration of ceramic tiles on exterior walls were clarified by the field investigation of townhouse, built during 1971~1990, in Kaohsiung City.After analyzing and comparing the deterioration of the above cases, the conditions of deterioration of external wall tiles, used on townhouses, were found as follows:The main deterioration of Mosaic tiles is rust stains, cracking and flaking.The main deterioration of square tiles is rust stains, efflorescence and cracking.The main deterioration of rectangular tiles is rust stains, cracking and flaking.

APA, Harvard, Vancouver, ISO, and other styles

9

NING, Zhi. "OPTIMIZATION OF CERAMIC WALL FLOW FILTER." Chinese Journal of Mechanical Engineering 42, no. 10 (2006): 122. http://dx.doi.org/10.3901/jme.2006.10.122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sooksaen, Pat, and Pathompong Puathawee. "Properties of Unglazed Ceramics Containing Aluminum Dross as a Major Component." Solid State Phenomena 266 (October 2017): 182–86. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.182.

Full text

Abstract:

Aluminum dross residue is a by-product produced at secondary re-melt plants where aluminum scraps are recycled. In this study, aluminum dross residue was utilized as a major component in the fabrication of unglazed ceramics for wall tile applications. The use of this by-product can reduce the landfill and environmental problems. The amount of aluminum dross residue used in the ceramic compositions varied in the range 50-90 wt.%. Other components utilized in the ceramic compositions included recycled glass alumino-silicate based clays. Firing was carried out between 1140 and 1200°C with 4h holding time which resulted in strong ceramic samples. Alpha-alumina, α-Al2O3 was the main crystalline phase found in all sintered ceramic samples. The appearance of mullite phase, Al6Si2O13 was evident in all fired samples. Overall, the synthesized ceramics had excellent densification characteristics when the amount of aluminum dross residue was less than 70 wt% in the ceramic composition.

APA, Harvard, Vancouver, ISO, and other styles

11

Gaishun, A. S., E. S. Gaishun, E. V. Kovaleristova, and K. S. Yavruyan. "WALL CERAMIC MATERIALS BASED ON TECHNOGENIC RAW MATERIALS OF COAL SERIES." Herald of Dagestan State Technical University. Technical Sciences 46, no. 1 (July 16, 2019): 152–59. http://dx.doi.org/10.21822/2073-6185-2019-46-1-152-159.

Full text

Abstract:

Objectives. The paper discusses the feasibility of using the technogenic raw materials of the coal series in the production of highly efficient wall ceramics. The interest in the man-made raw materials of the coal series (sludge, screenings and cake) as the raw materials used in the manufacture of ceramic products has now greatly increased. The reason for this was the reduction of the base of high-quality clay raw materials, the appreciation of its use in the production of wall ceramics, a large amount of accumulated reserves of various rocks of coal-based man-made raw materials.Method. The research used the following composition of the raw mix: 70% of technogenic raw materials of the coal series (screenings) and 30% of the clay raw materials. The determination of the physicomechanical properties of the samples was carried out according to GOST 530-2012. Coal dumps are fine- grained products, the solid part of which contains a significant amount of coal.Result. The technological parameters of obtaining wall ceramic products based on coal slimes are determined. Studied the main physico-technical characteristics of the materials obtained. Phase transformations occurring during the burning and patterns of the formation of the structure of the shard were studied. The feasibility of the production of highly efficient ceramic products with low thermal conductivity and density based on technogenic raw materials of the coal series using the technology of compression molding is shown.Conclusion. The results of theoretical studies are confirmed by practical data, which consist in the fact that in raw mixtures containing technogenic raw materials of coal series, a sharp increase in strength, taking into account the complete burning of carbon, occurs at temperatures of 1000-1060 ° C. The changes introduced during the production of products using this method will help achieve a significant energy saving of gas and optimization of the firing mode.

APA, Harvard, Vancouver, ISO, and other styles

12

Bozhko, Yu A., and K. A. Lapunova. "SILICA ROCK SINTERING IN WALL CERAMICS PRODUCTION." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture, no. 1 (April 13, 2018): 160–67. http://dx.doi.org/10.31675/1607-1859-2018-20-1-160-167.

Full text

Abstract:

The paper presents research results on the use of silica rock in the production of lining ceramic brick. The analysis of clay samples showed that they are non-sintering raw materials. The dependence is obtained between the firing temperature and the average density of ceramic brick. It is shown that the firing temperature depends on the material composition with the product water absorption. The relationship is detected between the firing shrinkage, density, and water absorption. The experiments on silica rock sintering show that the ceramic brick made therefrom has a low average density, increased firing shrinkage, porosity and water absorption. Silica raw materials can be used in the ceramic brick production.

APA, Harvard, Vancouver, ISO, and other styles

13

Gurieva, Victoria, and A. V. Doroshin. "The Press Powder Technological Parameters Optimization in Wall Ceramics Production by the Semi-Dry Pressing Method." Materials Science Forum 974 (December 2019): 419–23. http://dx.doi.org/10.4028/www.scientific.net/msf.974.419.

Full text

Abstract:

The paper presents the fundamental possibility of using ash and slag waste (ASW) of the fuel and energy complex in the production of ceramic bricks using the semi-dry pressing method based on the Buguruslan deposit low-melting aluminosilicate loams. The technological parameters optimization ways (molding moisture, grinding fineness, pressing pressure) in the production of ceramic bricks from low-quality clay raw materials using the experiment mathematical planning method are presented. The separate and joint grinding raw materials mixture rational composition influence on the ceramics technological properties is studied.

APA, Harvard, Vancouver, ISO, and other styles

14

Garmendia, N., L. Bilbao, R. Muñoz, G. Imbuluzqueta, A. García, I. Bustero, L. Calvo-Barrio, J. Arbiol, and I. Obieta. "Zirconia Coating of Carbon Nanotubes by a Hydrothermal Method." Journal of Nanoscience and Nanotechnology 8, no. 11 (November 1, 2008): 5678–83. http://dx.doi.org/10.1166/jnn.2008.211.

Full text

Abstract:

Carbon nanotubes have unique mechanical properties that open attractive possibilities in many fields, such as the biomedical one. Currently, zirconia ceramics are widely used as femoral heads, but case studies show that delayed failure can occur in vivo due to crack propagation. Nanotubes could avoid the slow crack propagation and enhance the toughness of the ceramic material used for prostheses fabrication. In this work, single-wall carbon nanotubes and multi-wall carbon nanotubes have been partially coated with nanozirconia via hydrothermal synthesis and characterized by several techniques: X-ray diffraction, infrared spectroscopy, scanning electron microscope, transmission electron microscope, electron energy loss spectra, X-ray photoelectronic spectroscopy and atomic force microscopy. By means of these techniques, the existence of bonds between zirconium and the carbon nanotube has been proved. The as covered nanotubes should offer a better wettability in the ceramic matrix and improve the dispersion of the carbon nanotubes, to obtain the desired new ceramic biomaterial with a longer lifetime and better reliability.

APA, Harvard, Vancouver, ISO, and other styles

15

Andriyani, Meita, Sonya Harwasih, and Eny Inayati. "Fabrication Technique of Dental Restoration Using Hybrid Ceramic With Cad Cam Method." Journal Of Vocational Health Studies 1, no. 1 (July 3, 2017): 32. http://dx.doi.org/10.20473/jvhs.v1.i1.2017.32-38.

Full text

Abstract:

Background : Ceramic is superior in aesthetic but fragile and breakable under bite pressure . Lack of understanding of material requirements for resistance in the oral cavity and minimal ceramic processing techniques is the initial cause of the failure. Hybrid ceramic dental restoration is a material that combines the good properties of ceramics and composites that have elasticity and ensures high strength and minimize the wall thickness of the restoration. Mechanical manufacture of dental restorations currently growing, CAD CAM systems are becoming popular in the field of dentistry. CAD CAM provides the advantage that the effectiveness of the time, does not require a lot of human resources, and produce a restoration with good quality. Purpose: To explain hybrid ceramic material and techniques of making hybrid ceramic dental restorations with CAD CAM system. Review: Hybrid ceramic is a material that combines the advantages of ceramics and composite elasticity. This material contains a hybrid structure with two networks, ceramic and polymer are linked to each other, known as double hybrid network. It added that the structure of the ceramic feldspathic network (86% wt) is reinforced by a polymer network (14% wt) are integrated as a polymer network filling cavities that exist in the network and make its structure ceramic hybrid ceramic material becomes denser. Conclusion: Hybrid ceramic having chewing load capacity and high elasticity, flexural strength 150-160 Mpa and fracture toughness 1.5 Mpa, higher than conventional ceramics. Mechanical manufacture of dental restorations using ceramic hybrid materials with CAD CAM method begins with scanning, selection of materials and tooth shade, designing, milling, followed by finishing, polishing, ends with staining and glazing.

APA, Harvard, Vancouver, ISO, and other styles

16

Zhang, Di, Ming Gang Wang, and Zhan Kui Zhao. "Nanocrystalline ZrO₂ Porous Ceramics Fabricated by SPS." Advanced Materials Research 306-307 (August 2011): 1398–401. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.1398.

Full text

Abstract:

The porous ZrO2 ceramics was prepared by spark plasma sintering (SPS) at 520 °C. A dense closed micro-cellular ceramic structure was fabricated with micron Al90Mn9Ce1 alloy powders clading by 10 wt% ZrO2 nano-powder. SEM image showed that the thickness of ceramic cell wall was 1.0 - 2.0 μm. After deep corrosion with 10% HCl, an integrity nanocrystalline ZrO2 porous sample was obtained. Based on the experimental results, the transient spark plasma sintering mechanism of micron-nano mixing powder was also studied.

APA, Harvard, Vancouver, ISO, and other styles

17

Sugiyama, Toyohiko, Keiji Kusumoto, Masayoshi Ohashi, and Akinori Kamiya. "Environmental Friendly Ceramic Building Materials." Key Engineering Materials 690 (May 2016): 150–55. http://dx.doi.org/10.4028/www.scientific.net/kem.690.150.

Full text

Abstract:

The global warming is one of the most serious problems. The decrease of CO2 emissions in our daily life is an important subject today. Recently, an application of water retentive materials as a paving material has attracted a great deal of attention in Japan. This material is effective for reducing heat island phenomenon, which is also a recent problem in many cities in Japan. Water retained in the material during rainfall evaporates when heated by sunshine. The latent heat absorbed by evaporating water works to cool the surroundings. The water retentive ceramic products are expected to be useful for building materials as well as pavements. Several performances are required on the water retentive ceramics when it is used as building materials. Its cost and quality are the important factors. Porous ceramic materials formed by pressing without firing is one of ideal low cost and eco-friendly candidates. The porous ceramics is also expected to be produced from recycled ceramic materials. By optimizing its composition and forming method, a water retentive material with high performance was developed. The trial product had the properties as follows; fracture toughness: 1300N, bending strength: 175N/cm, water absorption: larger than 30%, and precision in size (length): +-0.5mm for 150mm. The product showed also enough frost resistance. In this paper, the fundamental properties of the porous ceramics prepared without firing are discussed with referring to the results of the field experiments.Another subject recently studied by several tile manufactures in Japan is the glazed tile with high solar reflectance. The exterior walls covered with such a high solar reflectance tile keeps the surface temperature of the wall lower under the strong sunshine of summer. It is effective against heat-island phenomenon. In this paper, the outline of the research results on visible and infrared reflectance of many kinds of glazes is also discussed.

APA, Harvard, Vancouver, ISO, and other styles

18

Krifka, S., T. Anthofer, M. Fritzsch, K.-A. Hiller, G. Schmalz, and M. Federlin. "Ceramic Inlays and Partial Ceramic Crowns: Influence of Remaining Cusp Wall Thickness on the Marginal Integrity and Enamel Crack Formation In Vitro." Operative Dentistry 34, no. 1 (January 1, 2009): 32–42. http://dx.doi.org/10.2341/08-34.

Full text

Abstract:

Clinical Relevance The minimum effective thickness of cusp walls with adhesively bonded ceramic restorations is not yet defined. According to this in vitro study, a cusp wall thickness of at least 2.0 mm at the base is recommended.

APA, Harvard, Vancouver, ISO, and other styles

19

Scheithauer, Uwe, Florian Kerber, Alexander Füssel, Stefan Holtzhausen, Wieland Beckert, Eric Schwarzer, Steven Weingarten, and Alexander Michaelis. "Alternative Process Routes to Manufacture Porous Ceramics—Opportunities and Challenges." Materials 12, no. 4 (February 22, 2019): 663. http://dx.doi.org/10.3390/ma12040663.

Full text

Abstract:

Porous ceramics can be realized by different methods and are used for various applications such as cross-flow membranes or wall-flow filters, porous burners, solar receivers, structural design elements, or catalytic supports. Within this paper, three different alternative process routes are presented, which can be used to manufacture porous ceramic components with different properties or even graded porosity. The first process route is based on additive manufacturing (AM) of macro porous ceramic components. The second route is based on AM of a polymeric template, which is used to realize porous ceramic components via replica technique. The third process route is based on an AM technology, which allows the manufacturing of multimaterial or multiproperty ceramic components, like components with dense and porous volumes in one complex-shaped component.

APA, Harvard, Vancouver, ISO, and other styles

20

Lu, Xiao Bo, J. Z. Liu, Jin Hua Wen, Bao Hong Han, Jun Yan, and Hai Ping Cui. "Investigation on Stress Fields in Lined-Ceramics of the Composite Pipes Fabricated by SHS Metallurgical Process." Key Engineering Materials 280-283 (February 2007): 1771–74. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1771.

Full text

Abstract:

Based on the SEM observation on cracks in lined ceramics of the composite pipes, the stress fields in lined ceramics were analyzed. The results indicated that there are the compressive field and heat stress field in lined ceramics, resulting in the existence of radial cracks and net cracks; besides being influenced by wall thickness of ceramic layer, the strength of compressive stress field is also dependent on bonding strength between metal and ceramics, and the strength of heat stress field is dependent on temperature gradient in lined ceramics during cooling of the ceramics.

APA, Harvard, Vancouver, ISO, and other styles

21

Gurieva, Victoria A., and Aleksandr V. Doroshin. "Building Ceramics Based on Carbonate-Containing Raw Materials." Solid State Phenomena 284 (October 2018): 910–15. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.910.

Full text

Abstract:

The results of the production of wall ceramics based on the composition of low-melting argillaceous raw materials - loam and fuel slag in an amount of 10-30% by the method of semi-dry pressing are presented. Pre-baking and calcining properties of clay materials are investigated, the results of x-ray diffraction analysis and differential thermal analysis of the raw materials are given. The results obtained by the method of mathematical planning of the experiment made it possible to develop a model of ceramic bricks of the racial composition, to construct empirical dependencies in the system «technogenic product-technological factor-property» and to establish the influence of the addition of fuel slag on the basic physical and mechanical properties of wall ceramics: strength, density, water absorption , shrinkage. The results of studies of the modifying role of the container glass in the processes of pyrogenic synthesis of clay-slag masses and its effect on the preparation of a ceramic shard of a racial composition with the required properties are shown.

APA, Harvard, Vancouver, ISO, and other styles

22

Wang, Xiaotong, Nitin P. Padture, and Hidehiko Tanaka. "Contact-damage-resistant ceramic/single-wall carbon nanotubes and ceramic/graphite composites." Nature Materials 3, no. 8 (July 18, 2004): 539–44. http://dx.doi.org/10.1038/nmat1161.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Qin, Yue Ning, Fang Wang, Jie Guang Song, Min Han Xu, and Jia Wei Wu. "The Structure and Properties of Quartz Pore Gradient Ceramic Materials." Solid State Phenomena 331 (April 29, 2022): 215–20. http://dx.doi.org/10.4028/p-7kc602.

Full text

Abstract:

In view of the low performance of porous ceramics on the wall, the heavy task of saving clay resources, and the major problems of dredging the Yangtze River, this thesis uses low-grade quartz sand along the Yangtze River as the main raw material and kaolin as the plasticizer. Drying, sintering and other processes prepare high-performance porous quartz ceramics, and improve the performance of porous quartz ceramics by studying the control conditions and the control mechanism related to the performance of the sintered body. Quartz porous ceramic bodies were sintered at 1100 °C and 1200 °C, and no obvious gradient structure was found. However, the quartz porous ceramic bodies had obvious gradient structures after sintering at 1300°C. The quartz porous ceramic bodies were sintered. When the temperature is 1400 °C, the green body is not found to have a pore gradient structure. When the water-to-material ratio is 1.2 and 1.3, the quartz porous ceramic body has no obvious gradient structure; when the water-to-material ratio is 1.4, 1.5, the sample has an obvious gradient structure. Combining the cost performance between material performance and energy consumption, in order to obtain a better bonding point, porous silica ceramics should be prepared with a water-to-material ratio of 1.4 and a sintering temperature of 1300 °C to prepare porous silica ceramics with a better pore gradient structure. Its porosity is 32.45%, and its compressive strength is 5.23 MPa.

APA, Harvard, Vancouver, ISO, and other styles

24

Chen, Huifang, Yanfang Liu, Junying Chen, Lin Zhang, Yaohui Cai, Haiying Chen, Shoujun Wu, and Mingu Zhou. "The Clogging Rules of Ceramic Emitter in Irrigation Using Saline Water with Different EC." Agronomy 9, no. 8 (August 8, 2019): 436. http://dx.doi.org/10.3390/agronomy9080436.

Full text

Abstract:

Infiltration irrigation with saline water is a more effective method than drip irrigation to alleviate water scarcity worldwide, but so far, no report has discussed the clogging rules of ceramic emitters, a major component of infiltration irrigation system. To explore the clogging mechanism of ceramic emitter in saline water infiltration irrigation system, we used four kinds of saline water sources with electrical conductivity (EC) of 0.18, 1.74, 3.78, and 7.74 ds/m, respectively. In addition, we specifically investigated the law of discharge ratio variation (Dra) of ceramic emitters, as well as the composition and growth process of clogging substance. The results indicated that the Dra of ceramic emitters decreased in the process of saline water irrigation, and the higher the EC, the more obvious the decrease. The calcium carbonate (CaCO3) was the main component of the clogging substance in the inner wall of ceramic emitters. The clogging part was a layer on the inner wall of the emitters rather than the pores in the walls, and the clogging did not occur suddenly. Instead, it was caused by the long–term accumulation of the clogging substance. Moreover, with the increase of EC, the flocculation between the clogging particles in the water was enhanced and thus promoted the formation of stable and compact aggregates, which fundamentally led to the clogging acceleration of ceramic emitters. This clogging mechanism of ceramic emitters can provide some theoretical reference for the establishment of anti-clogging strategy.

APA, Harvard, Vancouver, ISO, and other styles

25

Ali, Sajjad Shakir, and Hassan Kareem Abdullah. "Effect of Using External Packaging Materials for New Building Walls on Heating Load." Wasit Journal of Engineering Sciences 6, no. 1 (April 3, 2018): 28–37. http://dx.doi.org/10.31185/ejuow.vol6.iss1.89.

Full text

Abstract:

Experimental and theoretical investigation of three types of external packaging materials (Gypsum board, Alucobond, Ceramic) for the residential building were carried out in the present work, to reduce heating load in winter. Experiments were carried out at the university of Wasit (Al-Kut city, late 32.5N), winter season by building small room from sandwich panel. The room's dimensions were 2m width, 2m length and 2.4m height. The south wall was made two slots. The slot dimensions are 0.3m width and 1m height. Two types of walls were built in the two slots. The first wall was built from common bricks. The second wall was built from bricks covered with packaging material. The radiant time series (RTS) method was used for calculating the experimental heat losses through the walls. The ESP-R program from Energy Systems Research Unit (ESRU) - University of Strathclyde used to calculate the theoretical results[1]. It is the intensity of the radiation and temperature on the walls. The results of the experimental work show that the maximum values of percentage energy saving as follows: External packaging materials; 16.77 Gypsum board,2.73 Alucobond and 2.3 Ceramic.

APA, Harvard, Vancouver, ISO, and other styles

26

Barros, Murilo C., Kaue T. N. Duarte, and Leonardo L. B. Roger. "Attenuation Measurement of Ceramic Blocks Wall Using X-Band Waves." Ceramics in Modern Technologies 3, no. 1 (June 29, 2021): 16–21. http://dx.doi.org/10.29272/cmt.2021.0002.

Full text

Abstract:

Nowadays, many companies depend on good communication between their technologies and Wi-Fi signal, which are part of the X-waves frequencies. Communication may suffer interference due to wave propagation’s difficulty, mainly depending on the number of walls and where the building is located. Therefore, buildings should be adapted to avoid this interference in order to minimize signal losses. Interference in wave propagation depends not only on walls but also on their structure. The studies of building construction and wave propagation may be complementary since the structure and organization may negatively affect the signal strength. This work analyzes X-waves’ attenuation (from 8GHz up to 12 GHz) in ceramic walls to evaluate their effects on wave propagation. This work differs from Literature not only by the material used, considering that there are many jobs involving concrete blocks, but also by calculating the wave signal focusing on a loss function in the analyzed object, enabling anomalous behavior analysis. This propagation behavior allows evaluating the most valuable equipment in a house (wireless device, TV). Finally, ceramic blocks were studied because they have a low cost, they are lightweight, easy to handle, and have a high frequency of use. The tests were performed in an 80cm x 80cm wall. The x-waves were produced by two horn antennas (transmitter and receiver) located at 70 cm of the wall on opposite sides and directions. We found an enhancement of attenuation in the x-waves frequency band with a significant drop at 11GHz. The signal drop mainly occurs due to the material characteristics, a.k.a stop band. This drop is caused by the electromagnetic band structure produced by the difference between the dielectric constant of the ceramic blocks and their periodically repeated voids called Electromagnetic Band Gap structure.

APA, Harvard, Vancouver, ISO, and other styles

27

Kodzoev, Mukhamad-Basir, Sergey Isachenko, Olimjon Rasulov, and Maria Kaddo. "Heat-efficient ceramic products based on modified rice straw." E3S Web of Conferences 263 (2021): 01019. http://dx.doi.org/10.1051/e3sconf/202126301019.

Full text

Abstract:

The current state of the building ceramics production is based on the following facts. Firstly, as a result of market conditions, the number of operating ceramics factories has significantly decreased. Secondly, considering the increase in the house construction rate due to the shift to new financing mechanisms, there has been an increase in the ceramic brick production by 2-3% since 2019. Growth opportunities are associated with higher thermal efficiency of ceramic products and masonry based thereon. The research objective in this article was the development of compositions for wall heat-efficient ceramics based on loess low-grade loams with the use of rice straw as a burnout additive and, in particular, the determination of the optimal processed rice straw consumption. The scientific novelty of the research consisted in the development of a method for selecting the ceramic mixtures composition, optimizing the composition and substantiating the rice straw and rice straw ash influence on the ceramic mixtures and products properties. Rice straw is introduced into clay masses at the preparation stage in an amount of 5-15% (by mass) of fluff rice straw, which burns out with burning temperature of 200-300°C and makes the mass porous, preventing shrinkage and forming ash containing up to 20% of amorphous silica. Carbonates in clay dissociate during firing, interacting with amorphous silica and forming various calcium silicates that strengthen the shard structure.

APA, Harvard, Vancouver, ISO, and other styles

28

Pereira, M., T. de Lacerda-Arôso, M. J. M. Gomes, A. Mata, L. C. Alves, and Philippe Colomban. "Ancient Portuguese Ceramic Wall Tiles (“Azulejos”): Characterization of the Glaze and Ceramic Pigments." Journal of Nano Research 8 (September 2009): 79–88. http://dx.doi.org/10.4028/www.scientific.net/jnanor.8.79.

Full text

Abstract:

Ancient ceramic wall tiles, called “azulejo”, firstly used on Portuguese churches, monasteries and palaces (15-18th century) have progressively been used in particular houses till the last century. These tiles and its use in huge decorative panels can be considered as a precious but fragile cultural heritage from Brazil to India, in several countries influenced by Portuguese culture. Morphologically, these tiles are composed by a porous clay-based ceramic body, the terracotta, covered by a protective glassy phase, the glaze. As artistic paintings, these murals incorporated various kinds of pigments in the glaze layer to create a pictorial impact on the walls of rich palaces or churches, real and durable monumental works-of-art. In the 21st century, degradation marks are visible on these ceramic tiles because of their use under corrosive conditions (moisture, atmospheric cycles…) along centuries. In order to promote their conservation and enhance their restoration, the physical-chemical characterization of the azulejos is performed in the present work, using mainly non-destructive processes like micro-Raman spectroscopy or X-Ray diffraction. In particular, Raman spectroscopy allows the detection of some nano/microcrystals present in the amorphous glaze due to pigments or opacifying agents or related to the elaboration process of the azulejo. Based on the observation of various selected fragments, one states that very few pigments have been used as colouring agents in this ceramic art during 17-18th centuries. Thus, the relationship between the different colours, the introduced pigments and the structural aspects of the glass will be focused. Some features related with the ancient ceramic technology will also be discussed.

APA, Harvard, Vancouver, ISO, and other styles

29

Guryeva, Viktoriya, Alexander Doroshin, and Yuliya Andreeva. "Building ceramics based on composition of low-quality clay and slurry." MATEC Web of Conferences 143 (2018): 02014. http://dx.doi.org/10.1051/matecconf/201814302014.

Full text

Abstract:

At present, there is a trend towards increasing demand for ceramic products with enhanced physical and mechanical properties. This study is aimed at developing scientifically grounded compositions of ceramic products that maximize the use of local low-quality aluminosilicate raw materials and secondary raw materials in brick-making technology. Characteristics of local low-melting clays and industrial waste in the form of drilling slurry with minimum percentage of petroleum product were studied and presented in this paper. Standard methods for determining physical and mechanical properties of bricks, physicochemical and statistical methods of research are used as a methodological framework. The paper shows effects of drilling slurry with an increased content of calcium oxide on the composition, physical and mechanical properties of wall ceramics, as well as effects of composition of low-quality local clays and slurries on the structure and properties of ceramic materials. The modifying role of container glass and its effects on properties of a synthesized ceramic piece were studied and presented.

APA, Harvard, Vancouver, ISO, and other styles

30

Lin, Tao, Fen Ge Cui, Sheng Yin, and Zhi Meng Guo. "Microstructure of Ceramic Layer in Composite Pipe Made by SHS-Gravitational Process." Key Engineering Materials 336-338 (April 2007): 1722–24. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.1722.

Full text

Abstract:

SHS-gravitational process was developed to synthesize the ceramic lined steel pipe, especially for elbow, conical pipe, three-way and four-way pipe and pipe with a small diameter. In SHS-gravitational process, the molten ceramic, which separated out from the reaction products due to their density difference, solidified to form the ceramic lined layer in the steel pipe when contacted with the steel pipe wall. With an X-ray diffractometer and a scanning electron microscope, it can be found that the ceramic layer is composed of α-Al2O3 and FeAl2O4. A small amount of iron also remains in the ceramic layer. There is a thin equiaxed grain area of alumina near the steel pipe wall, and then alumina was grown in form of dentrite to the surface of ceramic layer. FeAl2O4 distributes among alumina dentrite. Although the ceramic layer was solidified from one end to another end of a pipe, the microstructure of ceramic layer was almost uniform throughout the whole length of the pipe.

APA, Harvard, Vancouver, ISO, and other styles

31

Ozcelik, Huseyin. "Ceramic wall panels in architecture: The case of the work of art titled “Freedom”." Global Journal of Arts Education 7, no. 1 (June 12, 2017): 12–18. http://dx.doi.org/10.18844/gjae.v7i1.1830.

Full text

Abstract:

Abstract Looking at its historical process, the ceramic tile technique that appears in religious, military and administrative buildings as a wall cladding method, has nowadays given way to ceramic wall panels that contribute to the aesthetic values of contemporary architectural structures. This contribution made by the coordinated effort of the architect and the artist via ceramic wall panels, which started to be installed at specifically reserved spots within such contemporary architectural structures, also adds a positive impression on the identity of the structure. These panels, which are considered to be means of surface enrichment and identity attribution, comprise all the stages of forming a work of art. Light, color, circulation, balance, composition, etc. are the factors which stand out as the significant elements within the artwork. Unfortunately, aesthetic and environmental factors are not taken into account within the scope of the rapidly increasing settlement rate worldwide, including our country; and this in turn causes numerous structures in various cities around the world to look alike in shape and form. Still, there are artists, though few in number, who apply structural ceramic elements, which are both environment-friendly and have been in use for thousands of years, with a contemporary understanding. This study aims to elaborate on this issue with a specific focus on the case of the ceramic wall panel titled “Freedom” by Huseyin Ozcelik, executed in 2012 to qualify as a permanent example in which art engages with education; at the Central Library Building of the Near East University, North Cyprus. This application is a completely subjective, and by demonstrating the design and application processes to a group of students, it was aimed to serve educational purposes as well as to empower the structure with an artistic identity. Keywords: ceramic tiles, ceramic wall panels, design.

APA, Harvard, Vancouver, ISO, and other styles

32

Behnia, M., A. A. Dehghan, H. Mishima, and W. Nakayama. "Natural Convection Cooling of Multiple Heat Sources in Parallel Open-Top Cavities Filled With a Fluorinert Liquid." Journal of Electronic Packaging 120, no. 1 (March 1, 1998): 73–81. http://dx.doi.org/10.1115/1.2792289.

Full text

Abstract:

Natural convection immersion cooling of discrete heat sources in a series of parallel interacting open-top cavities filled with a fluorinert liquid (FC–72) has been numerically studied. A series of open-top slots which are confined by conductive vertical walls with two heat sources on one side are considered. One of the slots is modeled and simulated. The effect of the separation between the heat sources on the flow and heat transfer characteristics of the wall and the effect of strength of the lower heat source (which location is upstream of the other one) on the flow and heat transfer of the upper heat source are considered. The wall thermal conductivity considered ranges from adiabatic to alumina-ceramic. The results of bakelite and alumina-ceramic are shown, which are commonly used as wiring boards in electronic equipment. It is found that conduction in the wall is very important and enhances the heat transfer performance.

APA, Harvard, Vancouver, ISO, and other styles

33

Rachtanapun, Pornchai, Sukum Eitssayeam, and Kamonpan Pengpat. "Study of Carboxymethyl Cellulose from Papaya Peels as Binder in Ceramics." Advanced Materials Research 93-94 (January 2010): 17–21. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.17.

Full text

Abstract:

Effects of carboxymethyl cellulose from papaya peel (CMCp) on the properties of ceramics were investigated. Cellulose was extracted from papaya peels by NaOH and then it was modified by chloro acetic acid to obtain carboxymethyl cellulose. The prepared CMCp was applied as a binder in ceramic slip in order to increase its viscosity. Sodium silicate was also added into the slip for providing a dispersion of slip and protecting the sedimentation of clay particles. Various concentrations of CMCp and commercial CMC (CMCc) (0.05, 0.1, 0.15, 0.2 and 0.25% w/w of dry weight of clays) were added into the slip. Effect of CMC on viscosity of the slip and the ceramic density were studied. The relationship between the ceramic properties such as, shrinkage, porosity, casting rate and bending strength (both green strength and fired strength), and CMC concentration was also observed. As increasing both CMCp and CMCc, viscosity increased while density decreased. The prepared ceramics (green ware and fired ware) added with CMCp were found to have higher strength and lower in %shrinkage than that of adding with CMCc. The thickness of the ceramic wall adding CMCc increased with increasing CMCc concentration, and time in contrast to that of CMCp as the thickness decreased with increasing CMCp concentration. However, the ceramics with addition of CMCp possessed higher strength than that of the commercial one.

APA, Harvard, Vancouver, ISO, and other styles

34

Liu, Qi Wen, Fei Chen, Qiang Shen, and Lian Meng Zhang. "Optimal Design for Ceramic Radomes with A-Sandwich Structure." Advanced Materials Research 66 (April 2009): 29–32. http://dx.doi.org/10.4028/www.scientific.net/amr.66.29.

Full text

Abstract:

The radome performance is evaluated by means of a computer aided design (CAD) for the wall structure of multilayer ceramic radome in accordance with the microwave propagation theory. The calculation model for the ceramic radome with A-sandwich structure is built. By optimizing the thickness of the whole wall and the thickness and dielectric constant of skins and core layer, the power transmission efficiency at a broadband frequency of A-sandwich structure ceramic radome is calculated especially. The calculation results suggest that when the wall thickness is 6 mm, the thickness ratio of surface layer to core layer is 1:15 and dielectric constant of core layer is less than 2.5, the maximal broadband transmission efficiency is obtained.

APA, Harvard, Vancouver, ISO, and other styles

35

Vasiliev, Alexander L., Rosalı´a Poyato, and Nitin P. Padture. "Single-wall carbon nanotubes at ceramic grain boundaries." Scripta Materialia 56, no. 6 (March 2007): 461–63. http://dx.doi.org/10.1016/j.scriptamat.2006.12.007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Skripnikova, N. K., A. I. Potekaev, V. V. Shekhovtsov, G. G. Volokitin, M. A. Semenovykh, and O. G. Volokitin. "Wall ceramic products based on aluminum silicate materials." IOP Conference Series: Materials Science and Engineering 696 (November 27, 2019): 012016. http://dx.doi.org/10.1088/1757-899x/696/1/012016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Noirez, L., and P. Baroni. "Wall Effects induced by Ceramic in Quiescent Liquids." Journal of Physics: Conference Series 790 (January 2017): 012024. http://dx.doi.org/10.1088/1742-6596/790/1/012024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

ISHIYAMA, Takuji, Masaaki OKAMOTO, Tetsuhisa YAMADA, and Kei MIWA. "Effect of Ceramic Wall on Diesel Particulate Emission." Transactions of the Japan Society of Mechanical Engineers Series B 58, no. 554 (1992): 3214–19. http://dx.doi.org/10.1299/kikaib.58.3214.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Wiehl, Jürgen, and Claus Dieter Vogt. "Ceramic ultra-thin-wall substrates for modern catalysts." MTZ worldwide 64, no. 2 (February 2003): 8–11. http://dx.doi.org/10.1007/bf03228027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Belyakov, A. V., and A. I. Zakharov. "Enhancing the cold resistance of ceramic wall products." Glass and Ceramics 54, no. 3-4 (March 1997): 79–82. http://dx.doi.org/10.1007/bf02803729.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Bukaemskiy, Andrey, Johannes Fachinger, and Dirk Bosbach. "Synthesis and Properties of Reaction-Bonded SiC Ceramic with Embedded UO₂ - TRISO Coated Particles." Advances in Science and Technology 73 (October 2010): 136–41. http://dx.doi.org/10.4028/www.scientific.net/ast.73.136.

Full text

Abstract:

Ceramics based on SiC are characterized by extreme hardness, high thermal conductivity, relatively low thermal expansion and chemical durability. In principle, SiC ceramics can be considered as a long-term stable matrix for final disposal of radioactive waste, such as coated fuel particles (CP) separated from the graphite matrix from spent HTR (high-temperature gas-cooled reactor) fuel pebbles. In the present work, SiC-based ceramic with the embedded UO2 - TRISO (tristructural-isotropic) coated particles was synthesized by the reaction-bonding process. The synthesis was performed in standard SiC crucible. Several physico-mechanical properties of the synthesized samples were investigated. It was shown that the coated particles in the reaction-bonded silicon carbide (RBSiC) matrix are distributed homogeneously. The amount of pores is insignificant and the crippling of the coated particles is not observed. Besides, the junction between CP and RBSiC matrix and between RBSiC matrix and the SiC crucible is very good. For all ceramic components of the synthesized samples, namely, for the UO2-kernels, SiC-layers, SiC crucible wall and for the synthesized RBSiC ceramics, the values of microhardness and fracture toughness were measured and compared with the reference data. The strength properties, such as tensile strength of the synthesized samples, failure mechanism of the reaction-bonded SiC ceramic with embedded UO2 - TRISO coated particles, microstructure of the fracture surfaces, the peculiarities of the coated particles fracture were investigated in detail. Moreover, the diffusion of radioactive tracers (137Cs, 241Am, 36Cl, 3H) across synthesized ceramic was studied and the high safety characteristics of the synthesized ceramic were demonstrated.

APA, Harvard, Vancouver, ISO, and other styles

42

FÉNYI, BALÁZS, ORSOLYA KOSZOR, and CSABA BALÁZSI. "CERAMIC-BASED NANOCOMPOSITES FOR FUNCTIONAL APPLICATIONS." Nano 03, no. 05 (October 2008): 323–27. http://dx.doi.org/10.1142/s1793292008001040.

Full text

Abstract:

Silicon-nitride-based composites with 3 wt% of multi-wall and single-wall carbon nanotubes and graphene have been prepared. A manufacturing process has been worked out to avoid the damage of nanotubes and graphene during sintering. This method provides their preservation even in severe circumstances at temperature 1700°C and gas pressure 2 MPa. In this work, the conductivity according to the type and concentration of the carbon additives was observed by applying four-point DC resistance measurements. Insulator and conductor composites can be produced depending on the type of additives.

APA, Harvard, Vancouver, ISO, and other styles

43

de Bernardi-Martín, S., R. Poyato, Diego Gómez-García, and Arturo Domínguez-Rodríguez. "Processing of Swnt-Reinforced Yttria Stabilized Zirconia by Spark Plasma Sintering and Microstructure Characterization." Journal of Nano Research 18-19 (July 2012): 317–23. http://dx.doi.org/10.4028/www.scientific.net/jnanor.18-19.317.

Full text

Abstract:

Single wall carbon nanotube reinforced yttria stabilized zirconia ceramic materials have been obtained by means of spark plasma sintering technique. Single wall carbon nanotubes were treated in an acid solution before mixing with zirconia powders to obtain a uniform distribution of both powders. This method allows obtaining ceramic materials with a grain size between 200 nanometers and 1 micron and with a grain size distribution which depends on processing conditions. This new route opens a new perspective for new ceramic composites tailoring with enhanced mechanical properties as structural materials

APA, Harvard, Vancouver, ISO, and other styles

44

Correia, Sivaldo Leite, K. A. S. Curto, Dachamir Hotza, and Ana M. Segadães. "Using Experiments Design to Model Linear Firing Shrinkage of Triaxial Ceramic Bodies." Materials Science Forum 498-499 (November 2005): 430–35. http://dx.doi.org/10.4028/www.scientific.net/msf.498-499.430.

Full text

Abstract:

In the development and manufacture stages of floor and wall ceramic tiles, firing shrinkage is basically determined by the combination of raw materials and frequently used as quality control parameters. This configures the ideal scenario to apply the techniques of experiments design, often used in various other areas, to model those properties of such ceramics bodies. In this work, ten formulations of three different raw materials, namely a clay mixture, potash feldspar and quartz (triaxial compositions) were selected and processed under conditions similar to those used in the ceramics industry. With the experimental results, a regression model was calculated, relating linear shrinkage with composition. After statistical analysis and verification experiments, the significance and validity of the model was confirmed. The regression model can then be used to select the best combination of those three raw materials to produce a ceramic body with specified properties.

APA, Harvard, Vancouver, ISO, and other styles

45

Montaev, Sarsenbek Aliakbarovich, Karzhaubai Zhanabaevich Dosov, Nurgul Bolatovna Adilova, and Ainur Amangalievna Taudaeva. "INVESTIGATION OF RAW MATERIALS FOR CERAMIC AGGREGATES AND POROUS HEAT-INSULATING - STRUCTURAL WALL CERAMICS." Regional Architecture and Engineering, no. 4 (2021): 54–62. http://dx.doi.org/10.54734/20722958_2021_4_54.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Tian, Hao Liang, Xiao Min Zhang, Guo Jin, Yi Liang, Shi Cheng Wei, Chang Liang Wang, Meng Qiu Guo, and Xiu Xin Du. "Study on the Microstructure of Anti-Corrosion and Wear Resistant Coating on the Inner Wall of Equipment Pipeline and the Synthesis Mechanism of Ceramic Coating." Materials Science Forum 1026 (April 2021): 163–68. http://dx.doi.org/10.4028/www.scientific.net/msf.1026.163.

Full text

Abstract:

A corrosion-resistant and wear-resistant coating was prepared on the inner wall of copper tube by centrifugal self-propagating melting. The surface morphology, composition and phase composition of the ceramic lining FGM coating were analyzed by XRD and SEM, and the synthesis mechanism of the ceramic coating was studied. The results show that the functionally gradient coating is composed of three layers: ceramic inner layer, metal transition layer and copper substrate layer. The surface of ceramic lining is smooth and dense, which is mainly composed of Al2O3, CaF2 and a small amount of Fe Al spinel. The results show that the alumina phase is dendrite like and grows outward perpendicular to the tube wall, and the low melting point phase is evenly distributed in the dendrite gap, which effectively improves the density of the ceramic layer.

APA, Harvard, Vancouver, ISO, and other styles

47

Gadioli, Monica Castoldi Borlini, Mariane Costalonga de Aguiar, Abiliane de Andrade Pazeto, Sérgio Neves Monteiro, and Carlos Maurício Fontes Vieira. "Influence of the Granite Waste into a Clayey Ceramic Body for Rustic Wall Tiles." Materials Science Forum 727-728 (August 2012): 1057–62. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1057.

Full text

Abstract:

This work has as its objective to evaluate the influence of a granite waste into a clayey ceramic body for obtaining of rustic wall tiles. As raw materials, a clayey ceramic body for red ceramic production and a granite waste, resulting from ornamental stones cutting with the multi-wire technology were used. Compositions using 0, 10, 20 and 30% of waste incorporated into ceramic body were prepared. Specimens were fabricated by uniaxial press-molding at 20 MPa and sintered at 1050°C. The following properties were determined: linear shrinkage, water absorption and flexural rupture strength. In general, within the error bar, there was no influence of the waste in the values of water absorption of the clayey ceramic body. The results showed that all investigated formulations used in this work for the production of rustic wall tiles attend the standards for water absorption and mechanical strength.

APA, Harvard, Vancouver, ISO, and other styles

48

Jonaitis, Bronius, Valentin Antonovič, Arnoldas Šneideris, Renata Boris, and Robertas Zavalis. "Analysis of Physical and Mechanical Properties of the Mortar in the Historic Retaining Wall of the Gediminas Castle Hill (Vilnius, Lithuania)." Materials 12, no. 1 (December 20, 2018): 8. http://dx.doi.org/10.3390/ma12010008.

Full text

Abstract:

This study analysed the results of the joint research into the building materials of the historic masonry of the retaining wall of the Gediminas Castle Hill dating back to the end of the 13th and beginning of the 14th centuries. Core samples for material testing were collected along the entire height of the retaining wall to assess its load bearing capacity. Boreholes were drilled 600–1000 mm from the exterior of the wall to determine the properties of the ceramic bricks and lime mortar that were not affected by external factors. The analysis of the microstructure and chemical composition, mechanical and physical properties of the ceramic bricks and lime mortar is presented. The high compressive strength (8.5 MPa) of the lime mortar was the result of using hydraulic lime and crumbs of ceramic bricks as mortar aggregate.

APA, Harvard, Vancouver, ISO, and other styles

49

Vereshchagin, V. I., N. V. Mogilevskaya, and T. V. Safonova. "SINTERING AND DURABILITY OF CLAYAND DIOPSIDE-CONTAINING CERAMIC AND FAIENCE WALL MATERIALS." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture, no. 6 (December 29, 2019): 122–33. http://dx.doi.org/10.31675/1607-1859-2019-21-6-122-133.

Full text

Abstract:

The paper summarizes the research results of sintering and durability of wall ceramic materi-als modified by diopside-containing raw products and based on low-melting-point clays and loams, and kaolinand high-melting-point clay faience. Mechanical-and-physical properties of ceramic materials are identified and studied after annealing, depending on the diopside content. It is shown that depending on the content and introduction of clay minerals in the ceramic mixture, both coarse (0.5–1 mm) and fine (0.06 mm, dominating particle size of 0.01–0.015 mm) dis-persed diopside particles can be used. It is found that for loams with the clay mineral content of less than 10 wt.%, the addition of finely-dispersed diopside particles is more efficient. The latter provides ceramic sintering at 1000–1100 °С and increases its strength by 1.5–2 times. The intro-duction of dispersion diopside particles in the faience mixture lowers the annealing temperature from 1250 to 1150 °С with a simultaneous increase in its strength.

APA, Harvard, Vancouver, ISO, and other styles

50

Stolboushkin, Andrey Yu, A. I. Ivanov, and O. A. Fomina. "A Study on Structure and Phase Composition of Cellular Ceramic Materials from Dispersed Silica-Rich Rocks." Solid State Phenomena 284 (October 2018): 893–98. http://dx.doi.org/10.4028/www.scientific.net/ssp.284.893.

Full text

Abstract:

Studies on structure, phase composition and properties of ceramic wall materials with a glass-crystalline framework from dispersed silica-rich rocks are described. The results of chemical, mineralogical and granulometric compositions of tripolite and granulated foam-glass crystalline material (GFGCM) are presented. The dependence of physical and mechanical properties of cellular ceramic materials on GFGCM content in the composition in the amount from 5 to 75% is determined. Test samples of cellular ceramic materials with dimensions 250 × 120 × 65 mm, having a compressive strength 16.2-20.8 MPa, water absorption 7.1-7.9 % and an average density 0.99-1.32 g/m3 were produced at the factory. At the macroscale level the cellular structure of the ceramic material consists of closed pores with a vitrified inner surface pore, glass-crystalline outer shell of the pores and solid phase of the framework walls. It was established that after firing in the temperature range 850-900 °C the walls of the framework are represented by quartz, feldspar and hematite, a pronounced halo is indicating a significant amount of glass phase.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Wall ceramic'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles