Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)(y)(GaTe3)(1-y) far-infrared glasses

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39902155" target="_blank" >RIV/00216275:25310/16:39902155 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.06.002" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2016.06.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2016.06.002" target="_blank" >10.1016/j.jnoncrysol.2016.06.002</a>

Result language

angličtina

Original language name

Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)(y)(GaTe3)(1-y) far-infrared glasses

Original language description

Differential scanning calorimetry was used to study enthalpy relaxation kinetics of the (GeTe4)(y)(GaTe3)(1 - y) infrared chalcogenide glasses for the compositional range y = 0.4 - 1.0. The relaxation behavior was described in terms of the Tool-Narayanaswamy-Moynihan (TNM) model. Direct curve-fitting procedure was used to determine the values of TNM parameters; these results were successfully correlated with data provided by the non fitting methodology based on the evaluation from constant-ratio (CR) cycles. The addition of GaTe3 into the GeTe4 matrix led to a moderate decrease of activation energy of the relaxation process and to a large increase of the relaxation linearity - the structural relaxation became driven solely by temperature. Interpretation of the compositional evolution of the TNM parameters was used to verify structural information provided by Raman spectroscopy and molecular dynamics simulations: the initial GaTe3 addition causes dilution of the GeTe4 tetrahedral network, which carries the main portion of the relaxation motions; further increase of GaTe3 content then leads to an increase of connectivity outside the GeTe4 sub-networks due to the threefold coordinated Ga atoms bonding with the lone-pair electrons of Te dimers and short chains.

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

Result was created during the realization of more than one project. More information in the Projects tab.

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

447

Issue of the periodical within the volume

September

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

110-116

UT code for WoS article

000381841200017

EID of the result in the Scopus database

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