Non-isothermal crystallization of (GeS2)(0.1)(Sb2S3)(0.9) chalcogenide glass: Influence of reaction atmosphere

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39902153" target="_blank" >RIV/00216275:25310/16:39902153 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.08.034" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2016.08.034</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.08.034" target="_blank" >10.1016/j.jnoncrysol.2016.08.034</a>

Result language
angličtina
Original language name
Non-isothermal crystallization of (GeS2)(0.1)(Sb2S3)(0.9) chalcogenide glass: Influence of reaction atmosphere
Original language description
Differential scanning calorimetry, X-ray diffraction analysis and infrared microscopy were used to investigate the influence of reaction atmosphere (air versus pure nitrogen) on crystallization behavior of (GeS2)(0.1)(Sb2S3)(0.9) powdered and bulk glass. The presence of oxygen was found to accelerate (in comparison to pure N-2) the crystallization process in dependence on particle size of the powdered glass. Large amounts of mechanically induced defects (and not the increased surface area) were found to be the key catalyzing factor. Formal kinetic description of the crystallization mechanism (presented in terms of the nucleation-growth model) remained unchanged by the presence of oxygen. In addition, also the crystallographic nature of the crystalline products was similar for crystallization in air and in pure N-2. Direct observations by infrared microscopy confirmed that the (GeS2)(0.1)(Sb2S3)(0.9) glass crystallizes from surface. These observations also evidenced similar morphology of the crystallites growing in and without presence of oxygen, as well as the more preferential defects-based growth in case of the oxygenated samples. In addition, presence of oxygen was found to partially inhibit the powder sintering above the glass transition temperature.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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