Thermal characterization of (As2Se3)(0.5)(As2Te3)(0.5) infrared glass

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911956" target="_blank" >RIV/00216275:25310/17:39911956 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.011" target="_blank" >http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2017.09.011" target="_blank" >10.1016/j.jnoncrysol.2017.09.011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal characterization of (As2Se3)(0.5)(As2Te3)(0.5) infrared glass

Popis výsledku v původním jazyce

The structural relaxation and crystallization kinetics of the (As2Se3)(0.5)(As2Te3)(0.5) chalcogenide glass was studied by means of differential scanning calorimetry (DSC) and the influence of experimental conditions (particle size, heating rate) was observed. The Tool-Narayanaswamy-Moynihan (TNM) model was used for description of structural relaxation data. The structure of the studied glass was found to be similar to its purely selenide analogue (As2Se3), but the Te atoms appear to randomly incorporate into the short Se-As-Te chains; also they coexist in AsTe3/2 pyramidal units alongside the AsSe3/2 units. In case of the description of the crystallization kinetics, the nucleation-growth Johnson-Mehl-Avrami (JMA) model and the semi-empirical autocatalytic AC(M,N) model were tested on experimental DSC data. The suitability of JMA model was not confirmed due to the complexity of crystallization, therefore the AC(M,N) model was applied. These results were supported by the structural information from XRD analysis, Raman spectroscopy and infrared (IR) microscopy. The presence of As-Te, As-Se and As2Se(Te)(3) phases was confirmed and the occurrence of tellurium in the structure has a huge influence on overall structure and subsequent thermal behavior of the (As2Se3)(0.5)(As2Te3)(0.5) glassy material.

Název v anglickém jazyce

Thermal characterization of (As2Se3)(0.5)(As2Te3)(0.5) infrared glass

Popis výsledku anglicky

The structural relaxation and crystallization kinetics of the (As2Se3)(0.5)(As2Te3)(0.5) chalcogenide glass was studied by means of differential scanning calorimetry (DSC) and the influence of experimental conditions (particle size, heating rate) was observed. The Tool-Narayanaswamy-Moynihan (TNM) model was used for description of structural relaxation data. The structure of the studied glass was found to be similar to its purely selenide analogue (As2Se3), but the Te atoms appear to randomly incorporate into the short Se-As-Te chains; also they coexist in AsTe3/2 pyramidal units alongside the AsSe3/2 units. In case of the description of the crystallization kinetics, the nucleation-growth Johnson-Mehl-Avrami (JMA) model and the semi-empirical autocatalytic AC(M,N) model were tested on experimental DSC data. The suitability of JMA model was not confirmed due to the complexity of crystallization, therefore the AC(M,N) model was applied. These results were supported by the structural information from XRD analysis, Raman spectroscopy and infrared (IR) microscopy. The presence of As-Te, As-Se and As2Se(Te)(3) phases was confirmed and the occurrence of tellurium in the structure has a huge influence on overall structure and subsequent thermal behavior of the (As2Se3)(0.5)(As2Te3)(0.5) glassy material.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/GA17-11753S" target="_blank" >GA17-11753S: Kinetická analýza komplexních fyzikálně chemických procesů</a><br>

Návaznosti

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

Rok uplatnění

2017

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

475

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

121-128

Kód UT WoS článku

000413127700018

EID výsledku v databázi Scopus

2-s2.0-85030851105