Correlation between the structure and relaxation dynamics of (GeS2)(y)(Sb2S3)(1) (-) (y) glassy matrices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F18%3A39911959" target="_blank" >RIV/00216275:25310/18:39911959 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.11.004" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2017.11.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.11.004" target="_blank" >10.1016/j.jnoncrysol.2017.11.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Correlation between the structure and relaxation dynamics of (GeS2)(y)(Sb2S3)(1) (-) (y) glassy matrices

Popis výsledku v původním jazyce

Differential scanning calorimetry was used to study enthalpy relaxation kinetics of the (GeS2)(y)(Sb2S3)(1 - y) glasses in the y = 0.1-0.9 compositional range. The relaxation behavior was described in terms of the phenomenological Tool-Narayanaswamy-Moynihan (TNM) model. Non-linear optimization procedure was used to determine unique set of relaxation parameters for each studied glass. With increasing GeS2 content the activation energy of enthalpy relaxation was found to steeply decrease whereas the glass transition temperature increased significantly. Both non-linearity and non-exponentiality features were not affected by compositional changes. Raman spectra have shown that the Ge-S structural units, as opposed to the Sb-S units, are significantly interconnected and create a 3-dimensional network capable of solely carrying the relaxation motions, which is in agreement with the interpretation of compositional evolution of relaxation parameters. Moreover, based on the present data the controversy regarding the (GeS2)(y)(Sb2S3)(1 - y) fragilities found in literature was clarified, and the free-volume concept employing the Avrami growth theory was disputed.

Název v anglickém jazyce

Correlation between the structure and relaxation dynamics of (GeS2)(y)(Sb2S3)(1) (-) (y) glassy matrices

Popis výsledku anglicky

Differential scanning calorimetry was used to study enthalpy relaxation kinetics of the (GeS2)(y)(Sb2S3)(1 - y) glasses in the y = 0.1-0.9 compositional range. The relaxation behavior was described in terms of the phenomenological Tool-Narayanaswamy-Moynihan (TNM) model. Non-linear optimization procedure was used to determine unique set of relaxation parameters for each studied glass. With increasing GeS2 content the activation energy of enthalpy relaxation was found to steeply decrease whereas the glass transition temperature increased significantly. Both non-linearity and non-exponentiality features were not affected by compositional changes. Raman spectra have shown that the Ge-S structural units, as opposed to the Sb-S units, are significantly interconnected and create a 3-dimensional network capable of solely carrying the relaxation motions, which is in agreement with the interpretation of compositional evolution of relaxation parameters. Moreover, based on the present data the controversy regarding the (GeS2)(y)(Sb2S3)(1 - y) fragilities found in literature was clarified, and the free-volume concept employing the Avrami growth theory was disputed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA16-10562S" target="_blank" >GA16-10562S: Viskozita a kinetické jevy ve sklotvorných systémech</a><br>

Návaznosti

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

Rok uplatnění

2018

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

479

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

113-119

Kód UT WoS článku

000418217900014

EID výsledku v databázi Scopus

2-s2.0-85034567464