Crystallization of (GeSe2)(0.3)(Sb2Se3)(0.7) chalcogenide glass - Influence of reaction atmosphere

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914309" target="_blank" >RIV/00216275:25310/19:39914309 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0022309319300626?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022309319300626?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2018.12.034" target="_blank" >10.1016/j.jnoncrysol.2018.12.034</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crystallization of (GeSe2)(0.3)(Sb2Se3)(0.7) chalcogenide glass - Influence of reaction atmosphere

Popis výsledku v původním jazyce

Differential scanning calorimetry, infrared microscopy and X-ray diffraction analysis and were used to investigate the influence of reaction atmosphere (air versus pure nitrogen) on crystallization behavior of (GeSe2)(0.3)(Sb2Se3)(0.7) glass. The presence of oxygen was found to accelerate the crystal growth both on surface and in bulk material, with a similar effect in case of powders and bulk samples. Detailed crystallization kinetics study was performed, revealing that the presence of oxygen leads to a lowered activation energy and steeper onset of the process single-curve-averaged masterplot approach was used to deal with the temperature-differentiated complexity of the crystallization. Direct observations by infrared microscopy have shown that the presence of oxygen leads to a formation of robust surface crystalline layer, which prevents powder sintering and bulk samples deformation by viscous flow, and to a more rapid nucleation and crystal growth within the sample volume. Based on the viscosity values estimated for the crystallization temperatures, an explanation for the accelerated volume crystallization was proposed, employing the quasi-stationary conditions contributing to better cohesivity of critical nuclei and crystal/glass interface. The existence of the surface crystalline layer however prevents the sample from reaching full crystallinity.

Název v anglickém jazyce

Crystallization of (GeSe2)(0.3)(Sb2Se3)(0.7) chalcogenide glass - Influence of reaction atmosphere

Popis výsledku anglicky

Differential scanning calorimetry, infrared microscopy and X-ray diffraction analysis and were used to investigate the influence of reaction atmosphere (air versus pure nitrogen) on crystallization behavior of (GeSe2)(0.3)(Sb2Se3)(0.7) glass. The presence of oxygen was found to accelerate the crystal growth both on surface and in bulk material, with a similar effect in case of powders and bulk samples. Detailed crystallization kinetics study was performed, revealing that the presence of oxygen leads to a lowered activation energy and steeper onset of the process single-curve-averaged masterplot approach was used to deal with the temperature-differentiated complexity of the crystallization. Direct observations by infrared microscopy have shown that the presence of oxygen leads to a formation of robust surface crystalline layer, which prevents powder sintering and bulk samples deformation by viscous flow, and to a more rapid nucleation and crystal growth within the sample volume. Based on the viscosity values estimated for the crystallization temperatures, an explanation for the accelerated volume crystallization was proposed, employing the quasi-stationary conditions contributing to better cohesivity of critical nuclei and crystal/glass interface. The existence of the surface crystalline layer however prevents the sample from reaching full crystallinity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA17-11753S" target="_blank" >GA17-11753S: Kinetická analýza komplexních fyzikálně chemických procesů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

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

—

Svazek periodika

509

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

23-30

Kód UT WoS článku

000461531000003

EID výsledku v databázi Scopus

2-s2.0-85061030176