The effect of partial crystallinity on Se70Te30 crystallization kinetics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F16%3A39902166" target="_blank" >RIV/00216275:25310/16:39902166 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10973-016-5428-4" target="_blank" >http://dx.doi.org/10.1007/s10973-016-5428-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-016-5428-4" target="_blank" >10.1007/s10973-016-5428-4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of partial crystallinity on Se70Te30 crystallization kinetics

Popis výsledku v původním jazyce

The effect of partial crystallinity on Se70Te30 crystallization kinetics was investigated in dependence on experimental conditions of the measurement (applied heating rate and particle size of the powdered material). The whole range from completely glassy to almost fully crystalline Se-Te material was examined in this regard; the reproducible initial degree of crystallinity was achieved by preceding non-isothermal heating to a certain selected temperature. With the increasing degree of initial crystallinity, the defects-based crystallization mechanisms begin to dominate over the classical-nucleation-theory-based nucleation-growth crystallization mechanism, with the apparent activation energy and Johnson-Mehl-Avrami kinetic exponent limiting the values characteristic for the crystallization of fine powders (similar to 140 kJ mol(-1) and 1.4, respectively). The kinetic analysis based on the advanced interpretation of the characteristic kinetic functions provided detailed description of the changes associated with the complex crystallization process consisting of the competing surface- and volume-located growth mechanisms occurring in the grains of finite size.

Název v anglickém jazyce

The effect of partial crystallinity on Se70Te30 crystallization kinetics

Popis výsledku anglicky

The effect of partial crystallinity on Se70Te30 crystallization kinetics was investigated in dependence on experimental conditions of the measurement (applied heating rate and particle size of the powdered material). The whole range from completely glassy to almost fully crystalline Se-Te material was examined in this regard; the reproducible initial degree of crystallinity was achieved by preceding non-isothermal heating to a certain selected temperature. With the increasing degree of initial crystallinity, the defects-based crystallization mechanisms begin to dominate over the classical-nucleation-theory-based nucleation-growth crystallization mechanism, with the apparent activation energy and Johnson-Mehl-Avrami kinetic exponent limiting the values characteristic for the crystallization of fine powders (similar to 140 kJ mol(-1) and 1.4, respectively). The kinetic analysis based on the advanced interpretation of the characteristic kinetic functions provided detailed description of the changes associated with the complex crystallization process consisting of the competing surface- and volume-located growth mechanisms occurring in the grains of finite size.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

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Svazek periodika

125

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

447-458

Kód UT WoS článku

000377790200042

EID výsledku v databázi Scopus

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