Influence of particle size on crystallization and relaxation behavior of Ge20Se4Te76 glass for infrared optics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39901206" target="_blank" >RIV/00216275:25310/16:39901206 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2015.11.024" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2015.11.024</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2015.11.024" target="_blank" >10.1016/j.jnoncrysol.2015.11.024</a>

Result language

angličtina

Original language name

Influence of particle size on crystallization and relaxation behavior of Ge20Se4Te76 glass for infrared optics

Original language description

Influence of particle size on relaxation and crystallization behavior of the Ge20Se4Te76 chalcogenide glass was studied by differential scanning calorimetry (DSC). The structural relaxation kinetics was described by means of the Tool-Narayaswamy-Moynihan (TNM) model; it was found that the structural relaxation processes are not influenced by powder particle size or by the mechanically induced defects and heterogeneities originating from the grinding procedures the evaluated TNM parameters were constant for all tested powders. On the other hand, the crystallization kinetics of the Ge20Se4Te76 glass was found to be significantly influenced by the powder size. While the coarser powders exhibited a single-peak behavior corresponding to the nucleation growth Johnson-Mehl-Avrami (JMA) kinetics, the crystallization of finest powders proceeded in two distinct steps. XRD analysis identified the two DSC signals as crystallization of hexagonal Te and rhombohedral GeTe, indicating that large amounts of mechanically induced defects accelerate the Te precipitation. Regarding the overall thermal characterization, the evaluated glass-stability criteria have shown that although the studied chalcogenide glass is a very good glass-former, its stability largely depends on the sample form.

Czech name

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Czech description

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Type

J_x - 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

<a href="/en/project/GAP106%2F11%2F1152" target="_blank" >GAP106/11/1152: Reversible crystallization and structural relaxation in amorphous materials used for phase change recording</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Name of the periodical

Journal of Non-Crystalline Solids

ISSN

0022-3093

e-ISSN

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Volume of the periodical

433

Issue of the periodical within the volume

February 2016

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

75-81

UT code for WoS article

000369452400012

EID of the result in the Scopus database

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