Готові списки джерел за темами / Natural sintering

Добірка наукової літератури з теми "Natural sintering"

Автор: Grafiati

Опубліковано: 22 червня 2024

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Статті в журналах з теми "Natural sintering":

Hernández-Olivares, F., V. Aguado, E. Menéndez, and L. de Villanueva. "Sintering of natural anhydrite-glass composite." Journal of the European Ceramic Society 17, no. 5 (January 1997): 743–48. http://dx.doi.org/10.1016/s0955-2219(96)00088-x.

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Luo, Yi Lan, Shi Gen Zhu, Zheng Gang Yang, and Rui Zhang. "Study on the Mechanism of the Strippable Sintering Layer of the Natural Yellow Clay-Bonded Sand for Iron Casting." Applied Mechanics and Materials 66-68 (July 2011): 1622–27. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1622.

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The distinguished characteristic of casting process of natural yellow clay-bonded green sand is a strippable sintering layer formed at the interface of casting and mould. Hot shake-out can be realized because this sintering layer can firmly attach to the casting surfaces to protect castings at elevated temperature. Better surface quality of castings is achieved after the sintering layer easily shed from the casting surface at room temperature. In this study, a series of tests were carried out to reveal the characteristic of this sintering layer. First, thermal gravimetric/differential thermal analysis (TG/DTA) method was used for detailed analysis the thermal property of natural yellow clay-bonded green sand. And, X-ray diffraction (XRD) analysis was employed to define the phase composition at variable temperatures. Then, sintering experiments were carried out on mixtures of natural yellow clay-bonded sand with iron powder or iron oxides under different conditions. Finally, the mechanical performances of sinter layer of natural yellow clay-bonded sand at elevated and room temperatures were investigated. The result revealed that natural yellow clay-bonded green sand is a kind of low grade molding sand, and iron oxides participate in the forming of sintering layer. The sintering layer of natural yellow clay-bonded sand were proved both excellent plastic at elevated temperature and brittle at room temperature, which coincides with its behavior in the casting process.

Chouia, F., H. Belhouchet, F. Sahnoune, and F. Bouzrara. "Reaction sintering of kaolin-natural phosphate mixtures." Ceramics International 41, no. 6 (July 2015): 8064–69. http://dx.doi.org/10.1016/j.ceramint.2015.03.003.

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Zhang, Wang Nian, Xi Tang Wang, and Zhou Fu Wang. "Light Burning Condition of Preparing Dolomite Clinker Using Natural Dolomite." Solid State Phenomena 281 (August 2018): 156–62. http://dx.doi.org/10.4028/www.scientific.net/ssp.281.156.

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The influence of the light burning temperature on the sintering property of nature dolomite has been investigated by two-step sintering process in the temperature range 1500 °C to 1600 °C. The resulting bulk densities and apparent porosities of the sintered dolomite samples were examined, and analyzing the sintered dolomite by scanning electron microscopy and X-ray diffraction were performed. The results showed light burned at 850 °C for 3 h, the main phases of the dolomite with 3-5 grain size were MgO, CaO and little CaCO3, and then fired at 1600 °C,the density of sintering dolomite reached to 3.38 g/cm3, the apparent property was 1.2 %, the size of MgO grain up to 3.75 μm . However when dolomite light burned at 1050 °C for 3 h, the main phases were MgO and CaO, and then fired at 1600 °C,the density of sintering dolomite only was 3.30 g/cm3, the apparent property was 2.3 %, the size of MgO only was 3.05 μm .

Liu, Shu Long, Yong Li, Huan Ying Yang, Chang He Gao, Shu Long Ma, and Lin Jun Wang. "Study on Sintering Properties of Al₂O₃-70 Natural Mullite by New Processes." Advanced Materials Research 690-693 (May 2013): 49–52. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.49.

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This paper explains sintering properties of Al2O3-70(referred to as the 70 green sample) natural mullite that was prepared by the process of homogenization, wet grinding, vacuum extrusion and high-temperature tunnel kiln sintering. The results show that 70 green sample's dehydroxylation temperature started in 528 °C; 70 green sample's sintering densification started in 1500 °C; 70 green sample had not completed sintering in the 1600 °C, and at this temperature, to prolong the holding time also won't realize densification. After sintering at 1600 °C, the sample's bulk density is 2.82. In this sample, the mullite phase was uniform distribution, density, low porosity and most are closed porosity.

Zhang, Xuebin, Xingqin Liu, and Guangyao Meng. "Sintering Kinetics of Porous Ceramics from Natural Diatomite." Journal of the American Ceramic Society 88, no. 7 (July 2005): 1826–30. http://dx.doi.org/10.1111/j.1551-2916.2005.00288.x.

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Gouvea, Douglas, Agnès Smith, David Stanley Smith, Jean Pierre Bonnet, and Jose Arena Varela. "Translucent Tin Dioxide Ceramics Obtained by Natural Sintering." Journal of the American Ceramic Society 80, no. 10 (January 21, 2005): 2735–36. http://dx.doi.org/10.1111/j.1151-2916.1997.tb03186.x.

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Balkevich, V. L., A. Yu Kogos, A. B. Kliger, F. S. Peres, and A. M. Smirnitskii. "Sintering ceramic bodies with natural and synthetic wollastonite." Glass and Ceramics 45, no. 1 (January 1988): 30–33. http://dx.doi.org/10.1007/bf00700866.

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Kashcheev, I. D., K. G. Zemlyanoi, and I. A. Pavlova. "The sintering of ceramic materials based on North-Onega bauxitized clay. Part 2. The effect of sintering additives." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 11 (December 29, 2018): 23–28. http://dx.doi.org/10.17073/1683-4518-2018-11-23-28.

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The eﬀect of natural additives on the sintering ability of an aluminosilicate material has been investigated. It is shown that the introduction of natural alkali aluminosilicates with a predicted viscosity and amount of melt allows to obtain more durable ceramic materials.Ill.6. Ref 4. Tab. 2.

Guo, Ding, Jun Ding, Cheng Ji Deng, Hong Xi Zhu, Xiao Jun Zhang, and Wen Jie Yuan. "Reaction and Sintering Mechanism of Forsterite Lightweight Material in Sodium Carbonate Molten Salt." Advanced Materials Research 881-883 (January 2014): 1045–48. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.1045.

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Using the natural forsterite and Na2CO3 as a raw material, the forsterite lightweight material was prepared in Na2CO3 molten salt. The reaction between forsterite and Na2CO3 and sintering mechanism of forsterite were studied in the paper. The sintering temperature was 1000 °C, 1100 °C, and the holding time was 1 h, 3 h, 5 h, 7 h, 10 h, respectively. The sintered samples were characterized by XRD and SEM for their microstructure and phase composition analysis which determined the mechanism of the chemical reaction and sintering in the sintering process. The product of Na2MgSiO4 phase in In earlier period of the reactions promoted the rearrangement of particles of forsterite in the initial stage of sintering process. The sintering mechanism was mainly controlled by the diffusion mechanism.

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Дисертації з теми "Natural sintering":

Le, Coz Alexandre. "Investigation de nouveaux matériaux céramiques transparents dans l’infrarouge." Electronic Thesis or Diss., Université de Rennes (2023-....), 2023. http://www.theses.fr/2023URENS119.

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Ce travail de recherche porte sur l’élaboration de nouveaux matériaux céramiques sulfures et oxysulfures transparents dans l’infrarouge pour des applications en optique passive. La synthèse par combustion permet l’élaboration des poudres précurseurs de BaLa₂S₄ et La₂O₂S. Un traitement de sulfuration sous H₂S ou H₂S/H₂ à haute température est nécessaire pour obtenir des poudres de très grande pureté. Différentes méthodes de frittage ont été mises en œuvre afin de densifier le sulfure ternaire BaLa₂S₄ : pressage à chaud et frittage naturel sous H₂S suivi d’un post-traitement par compaction isostatique à chaud. Cette dernière technique permet l’obtention de céramiques de BaLa₂S₄ transparentes dans l’infrarouge. Cependant la transparence est limitée par des bandes d’absorption associées à la présence d’oxygène résiduel. La densification des poudres de La₂O₂S est réalisée par pressage à chaud. Une densité supérieure à 99 % est atteinte après seulement 2 h de frittage. Le broyage des poudres de La₂O₂S permet une importante optimisation de leurs morphologies conduisant à une amélioration significative des performances optiques des céramiques obtenues. Ainsi, la fenêtre de transparence s’étend de 1 à 10 µm avec une transmission maximale théorique atteinte autour de 7 µm. Un travail complémentaire serait nécessaire pour maximiser la transparence aux courtes longueurs d’onde afin d’envisager des applications en optique active
This work focuses on the development of new infrared transparent sulfide and oxysulfide ceramic materials for passive optics applications. A combustion synthesis method is used to produce BaLa₂S₄ and La₂O₂S precursor powders. Sulfurization treatment under H₂S or H₂S/H₂ at high temperature is required to obtain very high purity powders. Various sintering methods have been used to densify the ternary sulfide BaLa₂S₄ : hot pressing and natural sintering under H₂S followed by hot isostatic pressing. The latter technique allows the elaboration of infrared transparent BaLa₂S₄ ceramics. However, transparency is limited by absorption bands associated with the presence of residual oxygen. La₂O₂S powders are densified by hot-pressing. A density of over 99 % is achieved in only 2 h-sintering. Significant optimization of powders morphology is achieved through ball-milling leading to improved optical performances. The transparency window extends from 1 to 10 µm, with a theoretical maximum transmission reached around 7 µm. Further work is required to maximize transparency at short wavelengths to consider active optics applications

Guyon, Audrey. "Frittage ultra-rapide naturel : chauffage par micro-ondes et par induction." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENI087/document.

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Les techniques de frittage ultrarapide « naturel » (sans charge) comme le frittage par micro-ondes ou par induction présentent de nombreux avantages. Toutefois, le développement de ces techniques passe par une compréhension et une maitrise des mécanismes mis en jeu. A la fois similaires et complémentaires, ces procédés de chauffage-frittage ont été étudiées par une approche expérimentale afin d’approfondir les connaissances dans le domaine du Frittage Ultrarapide Naturel (FUN). Au cours de cette thèse, l’étude du frittage par micro-ondes de composites céramiques Al2O3-(Y)ZrO2 (3 à 40%vol.) a été menée parallèlement à celle du frittage par induction d’une poudre métallique micronique de nickel. La démarche expérimentale adoptée a consisté à réaliser des expériences de frittage à vitesses de chauffage imposées (de 25 à 1000°C/min) sur ces matériaux modèles et des pièces de petites dimensions, en se référant aux comportements en frittage conventionnel tant au niveau macroscopique qu’au niveau microscopique
The techniques of ultrafast pressureless sintering as microwave or induction sintering offer manyadvantages. However, the development of these techniques requires an understanding and a control ofthe mechanisms involved. Both similar and complementary, these processes of heating-sintering havebeen studied by an experimental approach to increase knowledge in the field of Ultrafast PressurelessSintering.In this thesis, the study of microwave sintering of Al2O3-(Y)ZrO2 composites has been conductedin parallel with induction sintering of a submicronic nickel powder. The experimental approach usedconsisted in carrying out sintering experiments at imposed heating rates (from 25 to 1000°C/min) onchosen materials and small parts, referring to conventional sintering behavior at the macroscopic andmicroscopic scale

Gajdowski, Caroline. "Élaboration de spinelle MgAl2O4 transparent par frittage naturel et post-HIP pour des applications en protections balistiques." Thesis, Valenciennes, 2018. http://www.theses.fr/2018VALE0022/document.

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Cette étude s’intéresse à l’amélioration et l’allégement des protections balistiques transparentes. L’utilisation conventionnelle de verre assure une haute efficacité face à un projectile, cependant associée à une masse élevée et à une forte épaisseur du blindage. Le remplacement de la face avant par une céramique polycristalline, telle que le spinelle MgAl2O4, assure un gain de performance et une réduction du volume de l’assemblage. L’élaboration de ce matériau requiert la combinaison d’une haute qualité optique dans le domaine du visible et de propriétés mécaniques élevées. Dans ce travail, l’application d’un frittage naturel sous vide d’une poudre commerciale de haute pureté a permis de limiter l’introduction d’impuretés néfastes à la transparence et la croissance granulaire. Une étape supplémentaire de pressage isostatique à chaud s’est montrée nécessaire à l’élimination des pores résiduels et à l’obtention de spinelles transparents de haute qualité optique (80% à 400-800 nm, e = 2 mm, Ø21 mm). Une étude de la microstructure avant et après post-traitement a permis de mettre en relation la taille des grains et des pores avant post-frittage avec la croissance granulaire observée pendant ce traitement. Une optimisation du procédé a ainsi pu être mise en place afin de limiter l’augmentation de la taille des grains et obtenir une microstructure homogène (~ 12 μm). Après un changement des dimensions des échantillons réussi (e = 4 mm, Ø60 mm), différents spinelles à propriétés microstructurales et mécaniques distinctes ont été sélectionnés pour une évaluation en conditions balistiques
This work focuses on the improvement and the lightening of transparent ballistic armours. The conventional use of glass provides high efficiency against a projectile, however associated with a heavy and thick armour. The replacement of the strike face by a polycrystalline ceramic, such as MgAl2O4 spinel, leads to a performance gain and a decrease of the protection volume. The development of this material requires the combination of a high optical quality in the visible domain and high mechanical properties. In this work, pressureless sintering under vacuum of a high purity commercial powder allowed to minimize the addition of impurities, detrimental to the transparency, and the grain growth phenomenon. An additional step of hot isostatic pressing was necessary to eliminate residual porosity and to obtain transparent spinel with high optical quality (80% at 400-800 nm, t = 2 mm, Ø21 mm). An analysis of the microstructure before and after the post-treatment made it possible to determine the link between the grain and pore sizes before post-sintering and the observed grain growth during this treatment. An optimisation of the process was established in order to restrain the grain size increase, and thus to obtain a homogeneous microstructure (~ 12 μm). After a successful up-scaling of the samples (t = 4 mm, Ø60 mm), several spinel samples with distinctive microstructural and mechanical properties were selected in order to evaluate their performances through ballistic tests

Orlik, Kelly. "Nouvelles céramiques piézoélectriques sans plomb pour des applications sonar ou de contrôle non destructif." Electronic Thesis or Diss., Valenciennes, Université Polytechnique Hauts-de-France, 2019. http://www.theses.fr/2019UPHF0010.

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Cette étude est focalisée sur l’élaboration du titanate de baryum dopé au calcium et au zirconium (BCTZ), de formule Ba₀∙₈₅Ca ₀∙₁₅Ti₀∙₉₀Zr₀∙₁₀O₃, par voie solide, le but étant de mettre au point un protocole de synthèse et de frittage optimisé et répétable de ce matériau piézoélectrique sans plomb. La variation de la composition a de plus été investiguée dans le but de trouver le meilleur compromis entre température de Curie et propriétés électriques. Il a été mis en évidence l’augmentation de la température de Curie au détriment des propriétés électriques par la diminution de la quantité de zirconium. Une limite de solubilité du calcium dans la maille BCTZ a aussi été observée pour des quantités de calcium de l’ordre de 20 %at. La voie solide étant un procédé chronophage et énergivore, les micro-ondes ont donc été testées comme technique de chauffage pour le frittage. Des échantillons présentant des caractéristiques électriques, comme la constante piézoélectrique inverse (d₃₃*), supérieures à celles mesurées par voie conventionnelle ont ainsi été obtenus, et ceci en réduisant de manière drastique le temps du processus de frittage. Le chauffage micro-ondes a aussi été employé à la fois pour la synthèse et le frittage, ce qui a permis d’obtenir un matériau dense à 88 % en 1 heures 30 minutes et présentant une piézoélectricité de l’ordre de 50 pC/N
In this work barium titanate doped with calcium and zirconium (BCTZ), with the composition Ba₀⋅₈₅Ca₀⋅₁₅Ti₀⋅₉₀Zr₀⋅₁₀O₃, was synthesized by solid-state route. The aim of this work was to elaborate an optimized and reproducible synthesis and sintering procedure. Besides, the composition was slightly varied to find the best compromise between the Curie temperature and the electrical properties. A decrease of the zirconium amount in this material led to an improvement of the Curie temperature associated to a decrease of the electrical properties. A solubility limit of 20 %at for calcium in BCTZ was demonstrated. Solid-state route coupled with conventional sintering proved to be an efficient process to obtain BCTZ samples with good properties but it is an energy and time-consuming process. By using microwave heating, the sintering step duration could be drastically reduced. Higher converse piezoelectric constant (d₃₃*) was measured for samples obtained by this fast sintering method. Microwave heating was also tested both to synthesize and to sinter BCTZ. Samples with a 88 % relative density and a d₃₃ piezoelectric constant of 50 pC/N were obtained in only 90 minutes

Gomes, Mariana Melo Nogueira Rosa. "Polar properties, phase sequence and lattice dynamics of K0.5Na0.5NbO3 ceramics prepared through different sintering methods." Dissertação, 2019. https://hdl.handle.net/10216/123594.

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Gomes, Mariana Melo Nogueira Rosa. "Polar properties, phase sequence and lattice dynamics of K0.5Na0.5NbO3 ceramics prepared through different sintering methods." Master's thesis, 2019. https://hdl.handle.net/10216/123594.

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Книги з теми "Natural sintering":

Castro, Ricardo. Sintering: Mechanisms of Convention Nanodensification and Field Assisted Processes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Castro, Ricardo, and Klaus van Benthem. Sintering: Mechanisms of Convention Nanodensification and Field Assisted Processes. Springer, 2014.

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Castro, Ricardo, and Klaus Benthem. Sintering: Mechanisms of Convention Nanodensification and Field Assisted Processes. Springer, 2012.

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Castro, Ricardo, and Klaus van Benthem. Sintering: Mechanisms of Convention Nanodensification and Field Assisted Processes. Springer London, Limited, 2012.

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Частини книг з теми "Natural sintering":

Kossacki, Konrad J., and Slawomira Szutowicz. "Comet 46P/Wirtanen: The Influence of Grain Sintering on the Evolution Layer." In Ice Physics and the Natural Environment, 309–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60030-2_23.

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Suzuki, Yoshikazu, Peter E. D. Morgan, and Tatsuki Ohji. "Pressureless-Sintering of CaZrO3/MgO In Situ Composites Derived from Natural Dolomite with Various Additives." In Design and Manufacturing of Composites, 285–89. New York: CRC Press, 2021. http://dx.doi.org/10.1201/9781003076131-51.

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Dang, Nhi Thao-Ngoc, Thien-Ly Vu, Tram Anh-Nguyen Ngoc, Thanh-Dat Nguyen, Toi Van Vo, and Thi-Hiep Nguyen. "The Effect of Sintering Temperature on the Behavior of Hydroxyapatite from Different Natural Sources in Artificial Saliva." In IFMBE Proceedings, 157–63. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-44630-6_12.

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Maisnam, Mamata. "Low Temperature Sintering of Lithium Based Ferrites." In Materials Horizons: From Nature to Nanomaterials, 265–83. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8307-0_13.

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Granados-Miralles, Cecilia, Matilde Saura-Múzquiz, and Henrik L. Andersen. "Permanent magnets based on hard ferrite ceramics." In Ceramic Materials - Present and Future [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002234.

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Permanent magnets are integral components in many of the modern technologies that are critical for the transition to a sustainable society. However, most of the high-performance (BHmax > 100 kJ/m3) permanent magnets that are currently employed contain rare earth elements (REE), which have long been classified as critical materials with a high supply risk and concerns regarding pollution in their mining. Therefore, suitable REE-lean/free magnets must be developed in order to ensure the sustainability of clean energy generation and electric mobility. The REE-free hexagonal ferrites (or hexaferrites) are the most used permanent magnets across all applications, with an 85 wt.% pie of the permanent magnet market. They are the dominant lower-grade option (BHmax < 25 kJ/m3) due to their relatively good hard magnetic properties, high Curie temperature (>700 K), low cost and good chemical stability. In recent years, the hexaferrites have also emerged as candidates for substituting REE-based permanent magnets in applications requiring intermediate magnetic performance (25–100 kJ/m3), due to considerable performance improvements achieved through chemical tuning, nanostructuring and compaction/sintering optimization. This chapter reviews the state-of-the-art sintering strategies being investigated with the aim of manufacturing hexaferrite magnets with optimized magnetic properties, identifying key challenges and highlighting the natural future steps to be followed.

Meloni, E., G. Iervolino, and V. Palma. "Basics of Microwave Heating and Recent Advances." In Advances in Microwave-assisted Heterogeneous Catalysis, 1–24. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837670277-00001.

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Since the late 1980s, the scientific community has been attracted toward the application of microwave energy as an alternative method of heating due to its advantages over conventional heating technologies. In fact, differently from conventional heating technologies, the microwave heating mechanism is a volumetric process in which heat is generated within the material itself, and, consequently, it can be very rapid and selective. In this way, the microwave-susceptible material can absorb the energy of the microwaves. The application of the microwave heating technique to a chemical process can lead to both a reduction in processing time as well as an increase in the production rate, which is obtained by enhancing the chemical reactions and results in energy saving. Microwave radiation has been used for the synthesis and sintering of materials for more than 20 years; the future challenges will be, among others, the development of processes with lower greenhouse gas (e.g., CO2) emissions and the discovery of novel energy-saving catalytic reactions. A natural choice in such efforts would be the combination of catalysis and microwave radiation. The main aim of this chapter is to provide an overview of the basics of microwave heating and the recent advances in microwave reactors. The chapter is divided into three principal sections: (i) an introduction to microwave chemistry and microwave materials processing; (ii) a description of the loss mechanisms and microwave-specific effects in heterogeneous catalysis; and (iii) new challenges and recent advances in microwave reactors.

Softas, Christos. "Selective Laser Sintering of Hydroxyapatite-Based Materials for Tissue Engineering." In Additive Manufacturing in Biomedical Applications, 92–105. ASM International, 2022. http://dx.doi.org/10.31399/asm.hb.v23a.a0006886.

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Abstract Hydroxyapatite (HA) is one of the most popular materials in tissue scaffold engineering due to its similarity to the nature of human bone; it accounts for more than half of the total weight of the latter. Selective laser sintering (SLS) is an additive manufacturing method that is used in producing tissue engineering parts from HA feedstocks. This article provides a brief overview of the process itself, along with a detailed review of HA-based tissue engineering applications using SLS. Discussion on the various polymer composites is presented. A detailed overview of selected publications on HA-based SLS studies is listed, which provides insight regarding technical aspects of processing HA powder feedstocks.

Bowker, Michael. "The effect of surface structure on reactivity." In The Basis and Applications of Heterogenuous Catalysis. Oxford University Press, 1998. http://dx.doi.org/10.1093/hesc/9780198559580.003.0002.

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This chapter discusses the effect of the surface structure on reactivity. Since the nature of the surface involved in heterogeneous catalysis is crucial to performance, it is important to consider the structure as a starting point for the discussion of catalytic properties. Generally speaking, surfaces with lower coordination surface atoms have the highest surface free energy, the highest reactivity for adsorption, and the strongest binding for the adsorbate (high adsorption heat). Because the surface is a region of high energy, thermodynamics dictates that there will be a tendency to minimise this energy. In nature, this occurs in several ways, including surface relaxation, surface reconstruction, sintering, and adsorption. The chapter then considers the surface structure of catalysts, as well as the structure dependence and independence of catalytic reactions. The best evidence for the influence of structure on a reaction comes from studies using model catalysts, namely single crystals.

Тези доповідей конференцій з теми "Natural sintering":

Selvi, Ekin, Ferit Topaloglu, Onur Tazegul, and E. Sabri Kayali. "Conventional sintering of diamond cutting tool used in natural stone cutting." In 3RD INTERNATIONAL ADVANCES IN APPLIED PHYSICS AND MATERIALS SCIENCE CONGRESS. AIP, 2013. http://dx.doi.org/10.1063/1.4849309.

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Zhang, Xiuxia. "Thermal-Sintering Treatment Enhance Electron Emission." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18538.

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The nanocrystalline diamond film (NCDF) was screen-printed on the glass substrates. The diamond paste of printing was fabricated by mixing nanographite. High-temperature reached 573K thermal-sintering technique and the 600 K and10mins anneal-treatment was explored. SEM images shown that the surface morphology of NCDF was improved, and nanocrystalline diamond emitters exposed from NCDF through the special thermal-sintering technique and anneal-treatment process. Edges and corners of nanocrystalline diamond are natural electron emitters. The electron emission was measured in every condition under 10−6pa pressure. The result indicated that electron transfer and electron emission of NCDF were improved by thermal treatment process.

Ali, Asmadi, Lim Shey Thing, Fazureen Azaman, and Mohd Al Amin Muhammad Nor. "Effect of sintering temperature on natural ceramic membrane for aquaculture effluent treatment." In INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5126546.

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Zhang, Xiaogang, Hua Chen, and Jing Zhang. "The Predictive Control of Sintering Temperature in Rotary Kiln Based on Image Feedback and Soft Computing." In Third International Conference on Natural Computation (ICNC 2007). IEEE, 2007. http://dx.doi.org/10.1109/icnc.2007.734.

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Tominc, Sara, Vilma Ducman, Jakob König, Srečo Škapin, and Matjaž Spreitzer. "Characterization and Mechanical Properties of Sintered Clay Minerals." In International Conference on Technologies & Business Models for Circular Economy. University of Maribor Press, 2024. http://dx.doi.org/10.18690/um.fkkt.1.2024.10.

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The need to reduce energy consumption and the carbon footprint generated by firing ceramics has stimulated research to develop sintering processes carried out at lower temperatures (ideally not above 300 °C) and high pressures (up to 600 MPa), the so-called cold sintering process (CSP) (Grasso et al., 2020, Maria et al., 2017). To evaluate the applicability of CSP to clays, we focused on two representative clay minerals, kaolinite and illite, and on the natural clay material obtained from a Slovenian brick manufacturer. The selected clay materials were characterized on the basis of mineralogical-chemical composition (XRD, XRF) and particle size distribution (SEM analysis, PSD, BET). The powders of clay minerals and natural clay material were first sintered in a heating microscope to determine the sintering conditions and then in a laboratory furnace at 1100 °C for 2 hours and additionally at 1300 °C for kaolinites. The effect of compression of the initial powders on their final properties was also investigated.

Pabst, Willi, Eva Gregorová, and Petra Šimonová. "The impulse excitation technique and its use for monitoring sintering processes." In INTELLIGENT BIOTECHNOLOGIES OF NATURAL AND SYNTHETIC BIOLOGICALLY ACTIVE SUBSTANCES: XIV Narochanskie Readings. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0147269.

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Xiao, Bin, and Yuwen Zhang. "Numerical Simulation of Direct Metal Laser Sintering of Single-Component Powder on Top of Sintered Layers." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13792.

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A three dimensional model describing melting and resolidification of direct metal laser sintering of loose powders on top of sintered layers with a moving Gaussian laser beam is developed. Natural convection in the liquid pool driven by buoyancy and Marangoni effects is taken into account. A temperature transforming model is employed to model melting and resolidification in the laser sintering process. The continuity, momentum, and energy equations are solved using a finite volume method. Effects of dominant processing parameters including number of the existing sintered layers underneath, laser scanning velocity and initial porosity on the sintering process are investigated.

Matějka, Michal, Zdeněk Veselý, and Jiří Tesař. "Possibilities of non-contact temperature measurement in additive direct metal laser sintering technology." In INTELLIGENT BIOTECHNOLOGIES OF NATURAL AND SYNTHETIC BIOLOGICALLY ACTIVE SUBSTANCES: XIV Narochanskie Readings. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0147161.

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Roppenecker, Daniel B., Mattias F. Traeger, Jan D. J. Gumprecht, and Tim C. Lueth. "How to Design and Create a Cardan Shaft for a Single Port Robot by Selective Laser Sintering." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87654.

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With the spread of endoscopic interventions the postoperative stress for patients has been reduced clearly. These interventions through natural orifices of the body (Natural orifice transluminal endoscopic surgery: NOTES) need miniaturized instruments with high precision, high range of motion and a high force load transmission. Our aim is to develop a mechatronic, single-port robotic system to guide and move flexible endoscopic instruments and optics inside the body. The system should be adapted to a flexible endoscope and consists of two flexible and actuated end-effectors that carry and manipulate flexible instruments. Due to the flexible end of the structure, laparoscopic single-port surgery through one incision and endoscopic surgery through a natural orifice would be possible. The concepts and prototypes were realized by selective laser sintering (SLS). One way to create flexible structures for a single use robot is to use universal joints assembled together in series. Next, selective laser sintering can now print these parts with the joints already assembled, in one part. There is no need for assembling or adhesive bonding. The final step is to replace the real joints of the cardan shafts with elastic joints. The proposed joints are made by the powder PA 2200 based on nylon. This basic powder is certificated as biocompatible according to ISO 10993-1. The challenge in this new field of printed medical robotics is to define a manufacturing process that enables you to design a part, create it by SLS and get it approved as a medical product.

Sang, Hongji, Zhengcheng Gu, Zheng Cui, Ruoxue Zou, and Yan Wu. "Preparation and Properties of Ceramic Solidified Product Containing Cs and Sr." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-92765.

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Abstract 137Cs and 90Sr in high level liquid waste, with high radioactivity, large heat-generating and relatively long half-life. In order to solve the problem of final disposal of 137Cs and 90Sr, natural mineral allophane was chosen as the base materials to synthesize the silicate ceramic solidified products with cold pressing/sintering method. The microstructure, phase composition and surface element distribution of the solidified products were analyzed. The solidification mechanism of the solidified products was also discussed. The surface of the solidified products appeared melting phenomenon after sintering, and the structure was more compact. CsAlSiO4, Sr2Al2SiO7 and SrAl2Si2O8, which can stably solidify Cs and Sr, were formed in the solidified products. The content of allophane in the solidified product has an important influence on the immobilization ratio of Cs and Sr. And at the sintering condition of 1 h duration time at 1200 °C, the immobilization ratios of Cs and Sr can reach 100 %. By increasing the content of cured substrate, the surface characteristics and crystallization properties of the solidified product can be improved, and the volume reduction effect was more obvious.