Crystallization kinetics of a-Ga5Se95-xSbx

The kinetics studies of a-Ga5Se95-xSbx (x = 0, 1, 5, 10) is analyzed by an isothermal and non-isothermal technique. By isothermal technique the analysis of crystallization kinetics is taken at temperatures between the glass transition and crystallization. The activation energy of crystallization (DeltaE(c)) and order parameter (n) are calculated by fitting the values of extent of crystallization (alpha) in the Avrami's equation. By non-isothermal technique crystallization kinetics of a-Ga5Se95-xSbx (x = 0, 1, 5, 10) with different heating rates of 5, 10, 15 and 20 K/min have been studied by using the Differential Scanning Calorimeter (D.S.C.). The glass transition temperature, crystallization temperature at different heating rates and structural change during glass transition has been determined from an empirical relation. From the heating rate, the dependence of the glass transition and crystallization temperatures, the activation energy for structural relation (Deltae(l)), the activation energy of crystallization (DeltaE(c)), and the order parameter (n) are calculated. (C) 2002 Published by Elsevier Science Ltd.