Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"glass ceramics"”.
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Glass-ceramics for solid oxide fuel cell seals
… a review of the literature on the development of glass and glass-ceramic sealants for solid oxide fuel cells (SOFC), including the critical issues for sealant design. Section two describes a quantitative approach to characterize the isothermal crystallization of glass using differential thermal …
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Preparation of glass-ceramics largely using steelmaking slags and study on the effect of iron content on properties of glass-ceramics
<p>Glass-ceramics were prepared using steelmaking industry waste containing high iron content based on powder sintering and crystallization method. Anthracite was used in varying amounts as the reducing agent to recover iron in raw materials. X-ray diffraction analysis (XRD), Fourier Transform …
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Fabrication, Kinetics and Crystallography of Lithium Disilicate Glass-Ceramics
… aspects of investigations on lithium disilicate glass-ceramics, namely, fabrication, kinetics, and crystallography. One of the objectives is to fabricate a high-strength glass-ceramic in complex lithium disilicate glass systems for dental restorative applications by means of compositional design …
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Glass ceramics from a South African pulverised fuel ash
… Station as a raw material, a project to prepare glass ceramic materials from the PF A was started. The conversion of the PF A to a glass ceramic material is a complex process involving many stages, and the processing at each stage will affects the final properties of the material. It is not …
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Advanced nanostructured optical glasses and glass-ceramics for photonic applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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Synthesis and characterization of in situ whisker-reinforced glass-ceramics
… on mechanical and thermal properties of glass-ceramics in the Li₂O-Al₂0₃-P₂0₆-Si0₂ system were investigated. When Ti0₂ whiskers, having an average aspect ratio of 28, are precipitated from the glass-ceramic matrix, …
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Development of novel micaceous glass ceramics for dental applications using CAD/CAM Systems
… was to develop and characterise machinable glass-ceramic materials for dental applications with the final outcome of producing a range of materials matching tooth enamel for aesthetics and mechanical properties. The candidate glass is a micaceous glass-ceramic which is compositionally based …
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Development and characterisation of calcium phosphate glasses and glass-ceramics containing fluorine and titanium
There is ongoing research into calcium phosphate glasses as possible candidates for use in dental restoration and in the field of bone implants. This is due to the fact that calcium phosphate glasses have many useful properties such as bioactivity, biocompatibility, bioresorbability and non …
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Anomalous Small Angle X-ray Scattering (ASAXS) analysis of nanocrystals in glass ceramics: structure and composition
Das Ziel der vorliegenden Arbeit ist eine quantitative Analyse von Nanokristallen in Bezug auf deren Struktur und Zusammensetzung. Diese Analyse wird von allen beteiligten Phasen (kristallin und amorph) von zwei verschiedenen Nano-Glaskeramiken mit Hilfe der anomalen Röntgenkleinwinkelstreuung …
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Effect of zinc substitution on the structure of calcium Fluoro-Alumino-Silicate glasses and glass-ceramics
Ionomer glasses are certain glass compositions that have been used as the glass component in glass ionomer cements. The term “ionomer” was traditionally related with the use of polyacrylic acid as the polymeric component of glass ionomer cements that incorrectly was characterized as an ionomer …
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Study of glass-ceramics and brazing alloys for joining oxide and non-oxide ceramic matrix composites in corrosive and high-temperature environments
L'abstract è presente nell'allegato / the abstract is in the attachment
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Nanoporous glass-ceramics transparent in infrared range to be used as optical sensor-Mechanical and viscoelastic properties of the TAS (Te-As-Se) glass
GeS₂-Sb₂S₃-CsCl glass-ceramics with nanoporous surfaces were synthesized and tested as optical elements. The nanoporosity is obtained through a two-step process, including controlled nucleation of CsCl nuclei in the glass matrix followed by selective etching of the nuclei with an acid solution. The …
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Development and characterization of sintered porous bioactive glass scaffolds for medical application
… This study focuses on researching bioactive glass scaffolds resembling natural trabecular bone tissues that are widely used in medical applications. The research investigates the relationship between processing parameters and the resulting microstructures of borosilicate, borophosphate, and …
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The sol-gel synthesis of anti-stokes luminescent glass materials
… problems that arise in the field of transparent glass materials with anti-Stokes luminescent properties are described. The literature has shown that rare earth doped oxide glasses, whilst chemically durable and relatively easy to manufacture, have weak anti-Stokes emissions, whereas rare earth …
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Corrosion resistance of modified β-Eucryptite
… than commercial lithium-alumina-silicate glass-ceramics when exposed to these environments. Aqueous HCI removes AIP04 from modified β-eucryptite leaving a very porous structure. Molten salt corrodes modified β-eucryptite by penetration of sodium and sulfur which form an alkali melt under …
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Generative Response.
… water from a local creek, found objects, glass, ceramics, copper, live organisms, and unique clay water filters.</p>
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A spectroscopic investigation of novel doped glasses for active infrared devices
A number of novel doped glasses have been studied for their potential as infrared amplifier materials. Optical amplifiers which operate outside of the C-band are likely to form part of future optical telecoms systems. This work is focused on transition metal and rare earth-doped materials which …
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Fundamental studies on ionomer glasses
… relationships were studied in glasses of the type used to produce glass lonomer dental cements. These materials are currently being developed as a bone cement in joint replacement surgery. Initially, a simple quaternary (25i02-Al203-CaO-CaF2) glass was produced and was found to …
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