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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

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Svazek periodika

452

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

102-108

Kód UT WoS článku

000388050800016

EID výsledku v databázi Scopus

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