Crystallization kinetics in As-Se-Sn glassy system

The crystallization kinetics of As30Se70−xSnx chalcogenide glasses where x=0, 1, 2 and 3 have been discussed under non-isothermal conditions by differential thermal analysis (DTA). From the heating rate dependence of the glass transition temperature (Tg) and the crystallization temperature (Tc), the values of the activation energy of glass transition (Eg) and activation energy of crystallization (Ec) are evaluated. Most of the above mentioned glassy compounds have three-dimensional growth mechanism, according to the average value of Avrami index (n). The calculated average values of activation energies of crystallization have been used for the estimation of the thermal stability as well as the glass-forming tendency.