Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)(y)(GaTe3)(1-y) far-infrared glasses
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)(y)(GaTe3)(1-y) far-infrared glasses
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Structural interpretation of the enthalpy relaxation kinetics of (GeTe4)(y)(GaTe3)(1-y) far-infrared glasses
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CF - Fyzikální chemie a teoretická chemie
OECD FORD obor
—
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Non-Crystalline Solids
ISSN
0022-3093
e-ISSN
—
Svazek periodika
447
Číslo periodika v rámci svazku
September
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
7
Strana od-do
110-116
Kód UT WoS článku
000381841200017
EID výsledku v databázi Scopus
—