Glass transition phenomena, crystallization kinetics and thermodynamic properties of ternary Se80Te20-xInx (x=2, 4, 6, 8 and 10) semiconducting glasses:: theoretical and experimental aspects

This paper presents the results of kinematical studies of glass transition and crystallization in glassy Se80Te20-xInx (x = 2,4, 6, delta and 10) using differential scanning calorimetry (DSC). Also the thermodynamic properties of these glasses in the transformation range of temperatures have been studied. Glass transition region has been investigated in terms of activation energy, dependence of glass transition temperature on coordination number with the varying composition and heating rates. The growth kinetics and its dimensionality have been investigated using three different models viz. Kissinger, Ozawa and Matusita equations. On the basis of the obtained experimental results on phase transformations in these glasses, thermodynamic parameters like entropy difference between metastable states in the glassy region, difference of Gibbs free energy, specific heat, entropy between the two phases and the enthalpy released during crystallization have been determined. On the basis of experimental observations and theoretical calculations of thermodynamic properties, it has been found that Se80Te10In10 is the most stable glass. (C) 2000 Published by Elsevier Science S.A.