Structural Interpretation of the Viscous Flow and Relaxation Kinetics in the As-Se and Ge-Se Chalcogenide Systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F24%3A39921980" target="_blank" >RIV/00216275:25310/24:39921980 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S002230932400365X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S002230932400365X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2024.123188" target="_blank" >10.1016/j.jnoncrysol.2024.123188</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural Interpretation of the Viscous Flow and Relaxation Kinetics in the As-Se and Ge-Se Chalcogenide Systems

Popis výsledku v původním jazyce

This study investigates the behaviour of As20Se80 and Ge25Se75 chalcogenide glasses near the glass transition temperature using differential scanning calorimetry (DSC) and thermomechanical analysis (TMA), addressing a gap in the literature for these compositions. Precise TMA measurements of viscosity in the range of 10E6 - 10E13 Pa.s clarified existing data and improved the quality of fits describing the temperature-dependent viscosity for both compositions. The DSC method enabled a comprehensive analysis of structural relaxation behaviours, which were described using the Tool-Narayanaswamy-Moynihan (TNM) model with the determination of its four parameters. The study discusses the viscosity and structural relaxation behaviours of both glass-formers in relation to their structure, referencing previous results for other binary chalcogenide glasses in the As-Se and GeSe systems. The findings indicate significant changes in viscosity and activation energy of structural relaxation with the addition of As or Ge, while the non-linearity and non-exponentiality parameters remain largely unaffected.

Název v anglickém jazyce

Structural Interpretation of the Viscous Flow and Relaxation Kinetics in the As-Se and Ge-Se Chalcogenide Systems

Popis výsledku anglicky

This study investigates the behaviour of As20Se80 and Ge25Se75 chalcogenide glasses near the glass transition temperature using differential scanning calorimetry (DSC) and thermomechanical analysis (TMA), addressing a gap in the literature for these compositions. Precise TMA measurements of viscosity in the range of 10E6 - 10E13 Pa.s clarified existing data and improved the quality of fits describing the temperature-dependent viscosity for both compositions. The DSC method enabled a comprehensive analysis of structural relaxation behaviours, which were described using the Tool-Narayanaswamy-Moynihan (TNM) model with the determination of its four parameters. The study discusses the viscosity and structural relaxation behaviours of both glass-formers in relation to their structure, referencing previous results for other binary chalcogenide glasses in the As-Se and GeSe systems. The findings indicate significant changes in viscosity and activation energy of structural relaxation with the addition of As or Ge, while the non-linearity and non-exponentiality parameters remain largely unaffected.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/GA24-10480S" target="_blank" >GA24-10480S: Fyzikální vlastnosti a termické chování chalkogenidových tenkých vrstev připravených z roztoku a termickým napařováním: Levné materiály pro IČ optiku</a><br>

Návaznosti

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

Rok uplatnění

2024

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

1873-4812

Svazek periodika

643

Číslo periodika v rámci svazku

November 2024

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

123188

Kód UT WoS článku

001297972900001

EID výsledku v databázi Scopus

2-s2.0-85201466680