FIZIKA A 15 (2006) 4 , 237-250

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NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF Sb10Ge10Se80 CHALCOGENIDE GLASS

H. A. HASHEMa,1 and S. ABOUELHASSANb

aPhysics Department, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
bPhysics Department, Faculty of Science, Benha University, Benha, Egypt
1E-mail address: ha_hashem@zu.edu.eg

Received 15 March 2005;   Revised manuscript received 23 September 2005
Accepted 27 November 2005   Online 23 February 2007

A differential scanning calorimetry technique was used to study the crystallization kinetics of Sb10Ge10Se80 chalcogenide glass under non-isothermal conditions. The crystallization parameters such as the order parameter (n), the frequency factor (k0), the activation energy of crystallization (Ec), the activation energy of glass transition (Eg) and the activation energy of nucleation (En) were determined. The value of Ec was deduced by means of six methods and the average value was found to be equal to (76.10 1.10) kJmol-1. The most suitable method for crystallization kinetic studies was the Augis-Bennett approximated method at different heating rates, while the method of Coats-Redfern-Sestak was the most suitable one at constant heating rate. The results have been discussed on the basis of theoretical principles.

PACS numbers: 61.43.Gt; 81.40.Ef; 64.70.Pf
UDC 532.782, 538.911

Keywords: chalcogenide glass, crystallization, DSC, glass transitions

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