Nucleation and crystallization of an As2Se3 undercooled melt

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F12%3A39895506" target="_blank" >RIV/00216275:25310/12:39895506 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ingentaconnect.com/content/sgt/pcg/2012/00000053/00000006/art00008" target="_blank" >http://www.ingentaconnect.com/content/sgt/pcg/2012/00000053/00000006/art00008</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Nucleation and crystallization of an As2Se3 undercooled melt

Popis výsledku v původním jazyce

The isothermal nucleation of an As2Se3 undercooled melt followed by crystallization and consequent melting was measured by DSC using a constant heating rate. The melting enthalpy was used to quantify the degree of conversion, a. Nonlinear regression analysis of the dependence of conversion on isothermal nucleation temperature and time was performed on the basis of classical nucleation theory assuming normal 3D growth. The parameters for the temperature dependence of nucleation rate and growth rate weredetermined by a three step process. First the simple parabolic model was used to estimate the maximum and the width of rate-temperature curve. Then the obtained parabolic curves were fitted by theoretical ones. In the third step the parameters obtained in the previous steps were used for nonlinear regression analysis of the experimental data. The kinetic barrier of crystal growth was found to be in agreement with the activation energy for viscous flow.

Název v anglickém jazyce

Nucleation and crystallization of an As2Se3 undercooled melt

Popis výsledku anglicky

The isothermal nucleation of an As2Se3 undercooled melt followed by crystallization and consequent melting was measured by DSC using a constant heating rate. The melting enthalpy was used to quantify the degree of conversion, a. Nonlinear regression analysis of the dependence of conversion on isothermal nucleation temperature and time was performed on the basis of classical nucleation theory assuming normal 3D growth. The parameters for the temperature dependence of nucleation rate and growth rate weredetermined by a three step process. First the simple parabolic model was used to estimate the maximum and the width of rate-temperature curve. Then the obtained parabolic curves were fitted by theoretical ones. In the third step the parameters obtained in the previous steps were used for nonlinear regression analysis of the experimental data. The kinetic barrier of crystal growth was found to be in agreement with the activation energy for viscous flow.

Druh

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

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B

ISSN

0031-9090

e-ISSN

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Svazek periodika

53

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

289-293

Kód UT WoS článku

000312920500008

EID výsledku v databázi Scopus

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