Kinetics of crystallization in glassy Se70Te30−xZnx using DSC technique

Calorimetric studies have been performed at different heating rates under non-isothermal conditions to determine the activation energy of crystallization (Ec) in glassy Se70Te30−xZnx (x=2, 4, 6, 8) using the well-known Kissinger's relation, Matusita-Sakka theory and the method of Augis and Bennett. The activation energy is found to be highly dependent on the Zn concentration. The rate of crystallization is found to be lowest for glassy Se70Te22Zn8 alloy. The thermal stability (Tc−Tg) is, however, found to be highest for this composition. This shows that the thermal stability is better in samples where the rate of crystallization is low.