Crystallization kinetics in Se70Te30 glass

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F10%3A39895991" target="_blank" >RIV/00216275:25310/10:39895991 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Crystallization kinetics in Se70Te30 glass

Popis výsledku v původním jazyce

In this work the crystallization kinetics of a chosen composition (x = 0.3) in the Se1-xTex glassy system is described. Bulk glass was prepared by a classical melt-quenching technique and was grinded to a fine powder with particle size 125 - 180 mým afterwards. The crystallization kinetics of the prepared glass was studied by differential scanning calorimetry technique under non-isothermal conditions for heating rates 0.5 - 30 K?min-1. Full kinetic analysis (i.e. determination of the activation energy of the crystallization process, suggestion of an appropriate kinetic model, and determination of the pre-exponential kinetic factor) was done for all measured samples. The activation energy determined by the Kissinger and Ozawa methods was found to be Ec= 148 +- 1.5 kJ?mol-1. The experimental data were then interpreted in terms of the Johnson-Mehl-Avrami (JMA) nucleation-growth model4-6, the parameter of this model was found to be n = 1.

Název v anglickém jazyce

Crystallization kinetics in Se70Te30 glass

Popis výsledku anglicky

In this work the crystallization kinetics of a chosen composition (x = 0.3) in the Se1-xTex glassy system is described. Bulk glass was prepared by a classical melt-quenching technique and was grinded to a fine powder with particle size 125 - 180 mým afterwards. The crystallization kinetics of the prepared glass was studied by differential scanning calorimetry technique under non-isothermal conditions for heating rates 0.5 - 30 K?min-1. Full kinetic analysis (i.e. determination of the activation energy of the crystallization process, suggestion of an appropriate kinetic model, and determination of the pre-exponential kinetic factor) was done for all measured samples. The activation energy determined by the Kissinger and Ozawa methods was found to be Ec= 148 +- 1.5 kJ?mol-1. The experimental data were then interpreted in terms of the Johnson-Mehl-Avrami (JMA) nucleation-growth model4-6, the parameter of this model was found to be n = 1.

Druh

O - Ostatní výsledky

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.09.0104" target="_blank" >EE2.3.09.0104: Podpora odborného vzdělávání a rozvoje vědeckovýzkumného týmu Centra materiálového výzkumu Pardubice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů