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Dissertations / Theses on the topic 'Aluminosilicate ceramics'

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1

Rappensberger, Csaba Ferenc. "Novel rare-earth aluminosilicate glasses and glass-ceramics." Thesis, University of Warwick, 1996. http://wrap.warwick.ac.uk/56937/.

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2

Villalobos, Guillermo Roberts. "Strength enhancement of nicalon reinforced lithium aluminosilicate containing a Ta₂O₅ second phase." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/19969.

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3

Zhang, Siqi. "The effect of boron substitution on the structure of calcium-aluminosilicate calcium-fluoro-aluminosilicate glasses and glass-ceramics." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7173/.

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This work focuses on the effect of boron substitution for aluminium on the structure o£ a series of fluorine-free (4.5Si02-3A12O3-1.5P205-5Ca0) and fluorine-containing (4.5Si02-3A1203-1.5P205-3Ca0-2CaF2) glasses and the resultant glass ceramics has been studied by using a combination of analytical tools like helium pycnometer, FTIR, Raman, XRD, multinuclear MAS-NMR spectroscopy and thermal analysis by DSC and TGA. The morphology of the crystal phases was observed by ESEM, and the identification of the composition observed was achieved by EDX. The density of both boron-substituted aluminium gla
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4

Jermy, Mark Christopher. "Structural studies of alkali aluminosilicate glasses using advanced scattering, resonance and computational techniques." Thesis, University of Kent, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337317.

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5

Keshavarzi, Ashkan [Verfasser], Christian [Akademischer Betreuer] Rüssel, and Delia Silke [Akademischer Betreuer] Brauer. "Crystallization und microcharacterization of Yttrium aluminosilicate glass-ceramics / Ashkan Keshavarzi. Gutachter: Christian Rüssel ; Delia Silke Brauer." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1067098879/34.

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6

Reddy, Allu Amarnath. "Alkaline-earth aluminosilicate-based glass and glass-ceramic sealants for functional applications." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/15217.

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Doutoramento em Ciência e Engenharia dos Materiais<br>The planar design of solid oxide fuel cell (SOFC) is the most promising one due to its easier fabrication, improved performance and relatively high power density. In planar SOFCs and other solid-electrolyte devices, gas-tight seals must be formed along the edges of each cell and between the stack and gas manifolds. Glass and glass-ceramic (GC), in particular alkaline-earth alumino silicate based glasses and GCs, are becoming the most promising materials for gas-tight sealing applications in SOFCs. Besides the development of new glass
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7

Bouchouicha, Hamed. "Élaboration, caractérisation structurale et étude des propriétés de luminescence des verres et des vitrocéramiques alumino-silicatés de calcium dopés à l'europium." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1035/document.

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Ce travail de thèse porte sur l'étude des verres alumino-silicatés de calcium dopés à l'europium et le processus de leur cristallisation sous forme des vitrocéramiques dans le cadre de la recherche de nouveaux phosphores pour application LED à émission blanche. Nous avons étudié trois échantillons vitreux avec différentes teneurs en silice et avons élaboré des vitrocéramiques cristallisées. La caractérisation des verres et des vitrocéramiques a été réalisée par différentes techniques expérimentales : l'analyse thermique, la diffraction des rayons X et la spectroscopie de diffusion Raman. Les p
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8

Selvaraj, K. "Preparation of aluminosilicate based ceramics, β-spodumene and cordierite using zeolites as precursors and their characterization for microelectronic and other applications". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2000. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5949.

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9

Al, Saghir Kholoud. "Céramiques transparentes par cristallisation complète du verre : application aux aluminosilicates de strontium." Thesis, Orléans, 2014. http://www.theses.fr/2014ORLE2023/document.

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Les céramiques transparentes élaborées par cristallisation complète du verre constituent une nouvelle famille de matériaux de qualité photonique en compétition avec la technologie des monocristaux pour les applications optiques. Cette approche verrière offre des avantages considérables par rapport aux monocristaux et aux céramiques polycristallines frittées : un coût réduit, la possibilité d’une production à grande échelle, une large gamme de compositions chimiques accessibles, une mise en forme plus souple et un taux de dopage élevé. Dans le cadre de ce travail, nous avons synthétisé des céra
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10

Luk, Kathryn Michelle. "The encapsulation of nuclear waste in a magnesium aluminosilicate glass-ceramic." Thesis, University of Warwick, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342511.

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11

Alahraché, Salaheddine. "Vitrocéramiques transparentes d'aluminates : mécanismes de cristallisation et étude structurale." Phd thesis, Université d'Orléans, 2011. http://tel.archives-ouvertes.fr/tel-00831691.

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Cette thèse porte sur l'étude du processus de cristallisation de verres et l'élaboration de vitrocéramiques transparentes dans le visible. Ce travail a permis d'élaborer plusieurs vitrocéramiques complètement cristallisées et transparentes, ce qui constitue un résultat exceptionnel pour ce type de matériaux qui perd habituellement la transparence lors de la cristallisation. Ces matériaux originaux et novateurs ont fait l'objet d'un brevet sur des "Céramiques transparentes" (dépôt en France N° 1161025 et extension internationale PCT N° EP2012/074171) et de plusieurs articles (cf. page 162). Plu
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12

Maldia, Leopoldo C. "Sodium sulfate corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composites." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277224.

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13

Newton, Peter J. "Sodium sulfate corrosion of silicon carbide fiber-reinforced calcium aluminosilicate glass-ceramic matrix composites." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA283703.

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14

Vazquez, Calnacasco Daniel. "All-Oxide Ceramic Matrix Composites : Thermal Stability during Tribological Interactions with Superalloys." Thesis, Luleå tekniska universitet, Materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85513.

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The challenges faced in today’s industry require materials capable of working in chemically aggressive environments at elevated temperature, which has fueled the development of oxidation resistant materials. All-Oxide Ceramic Matrix Composites (OCMC) are a promising material family due to their inherent chemical stability, moderate mechanical properties, and low weight. However, limited information exists regarding their behavior when in contact with other high-temperature materials such as superalloys. In this work three sets of tribological tests were performed: two at room temperature and o
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15

Glatz, Pauline. "Influence de P2O5 sur la structure et la nucléation de verres d'aluminosilicates d'alcalins." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS302.

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Les vitrocéramiques sont des matériaux obtenus par cristallisation contrôlée de verres. Ils offrent l’avantage d’une mise en forme facile des verres et de propriétés améliorées ou nouvelles par rapport aux verres ou aux cristaux. Le contrôle de la nucléation, première étape de la cristallisation, est essentiel pour optimiser les propriétés de ces matériaux. Dans les compositions commerciales, des agents nucléants sont ajoutés pour favoriser la cristallisation en volume de la phase d’intérêt. Cependant, les mécanismes fondamentaux qui gouvernent l’action de ces agents nucléants sont encore mal
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16

Hunt, Richard K. "A transmission electron microscope characterization of sodium sulfate hot corrosion of silicon carbide fiber-reinforced lithium aluminosilicate glass-ceramic matrix composite." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA286164.

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17

Seron, Alain. "Synthèse ß'-SiAlON par hydrogéno réduction nitrurante : application à l'élaboration de films sur des composites thermostructuraux." Orléans, 1993. http://www.theses.fr/1993ORLE2035.

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Bien que les composites carbones représentent une avancée technologique notoire dans le domaine des matériaux thermostructuraux, leur utilisation reste limitée par une forte réactivité en atmosphère oxygénée. L'objectif de cette étude était donc de revêtir la surface de tels composites d'une couche de céramique capable de s'opposer à la diffusion des composes oxygénés vers les sites actifs. La méthode choisie consiste en un dépôt, sur les pièces à revêtir, d'un réactif en suspension ou en milieu sol-gel, suivi d'une étape de céramisation. De part leurs propriétés physico-chimiques, les ß'-SiAl
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18

Lambert, Julien. "Etude structurale d’aluminosilicates de calcium : application à la valorisation de déchets amiantés pour le stockage thermique d’énergie solaire." Thesis, Orléans, 2013. http://www.theses.fr/2013ORLE2012.

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L’objectif de ce travail de thèse est d’établir les relations entre les propriétés structurales et les conditions d’élaboration d’un vitrifiat de déchets amiantés (nom commercial Cofalit®), dans la perspective de fabriquer un prototype de module de stockage thermique d’énergie solaire. Malgré des provenances de déchets très diverses, les variations de compositions du vitrifiat restent limitées. Les conditions d’élaboration (de refroidissement en particulier) induisent par contre d’importantes disparités dans la microstructure. L’analyse d’une carotte de Cofalit nous a permis de déterminer les
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19

Chen, Yi-Chun, and 陳奕君. "Negative Thermal Expansion Lithium Aluminosilicate Glass-Ceramics." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05625564313525010879.

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碩士<br>大同大學<br>材料工程學系(所)<br>94<br>Most materials have positive thermal expansion (PCTE) .β-eucryptite (Li2O.Al2O3.2SiO2) solid solutions have negative coefficients of thermal expansion (NCTE) ,which can be coupled with PCTE components to reduce the variation of temperature coefficients of the components.The main objective of this thesis is to investigate the formation and properties of negative thermal expansion glass-ceramics containing β-eucryptite. The effects of composition modification (SiO2 content, the kinds and amount of nucleation agents, excess Li2O) on CTE were also examined. Accordi
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20

陳郡甫. "Effect of adding TiO2 on the microstructure of lithium aluminosilicate glass ceramics during devitrification processes." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/24397627530221228289.

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碩士<br>國立清華大學<br>工程與系統科學系<br>95<br>In the thesis, we changed the titanium dioxide contents under different heat treatment conditions to observe the variations of the inner microstructure while the phase transform. X-ray powder diffraction, X-ray absorption spectroscopy and infrared spectroscopy were used. According to the XRD results, while the titanium dioxide contents were increased, the phase transformation temperatures of the main phases (β-quartz solid solutions and β-spodumene solid solutions) were decreased. And then various secondary phases were usually precipitated at higher temperatur
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21

Wang, Sheng-Hao, and 王聖皓. "Syntheses of Lithium Aluminosilicate for Porous Filters : Glass-Ceramic method and Geopolymerization." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/70812093336728756127.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>102<br>The porous filters were prepared by two methods. (1) Geopolymerization: Self-made LAS glass can be synthesized in alkaline solutions of activation the particle surface. Geoploymer filters produced by a polymerization reaction; (2) Glass-Ceramic method: LAS glass through nucleation at 24h and ceramic grain growth. The form interconnected pores filters can be produced in HF of Residual glass etched. This study used the two major greenhouse gases of CO2 and CH4 to simulate the production of Geoploymer filters and Glass-Ceramic filters with H2 produced through
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22

Denga, Masindi Esther. "Fabrication of metal-oxide modified porous ceramic granules from aluminosilicate clay soils for defluoridation of groundwater." Diss., 2017. http://hdl.handle.net/11602/894.

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MENVSC<br>Department of Ecology and Resource Management<br>Some boreholes in South Africa which serve as a source of drinking water for rural communities are reported to have high fluoride concentration, much above the WHO guideline of 1.5 mg/L. This study aimed at activating aluminosilicate clay soil mechanochemically, modifying aluminosilicate clay soil with Al-oxide and fabricating porous ceramic granules using Al-oxide modified mechanochemically activated aluminosilicate clay soil/ mechanochemically activated clay soil/ corn starch and evaluating their performances in defluoridation of gro
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23

"Novel Materials and Processing Routes Using Alkali-activated Systems." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.54957.

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abstract: This dissertation aims at developing novel materials and processing routes using alkali activated aluminosilicate binders for porous (lightweight) geopolymer matrices and 3D-printing concrete applications. The major research objectives are executed in different stages. Stage 1 includes developing synthesis routes, microstructural characterization, and performance characterization of a family of economical, multifunctional porous ceramics developed through geopolymerization of an abundant volcanic tuff (aluminosilicate mineral) as the primary source material. Metakaolin, silica fume,
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