Crystallization kinetics in new Sb14As29Se52Te5 amorphous glass

Differential scanning calorimetry (DSC) under non-isothermal conditions is used to study the crystallization kinetics of Sb14As29Se52Te5 chalcogenide glass. In addition, two approaches are used to analyze the dependence of glass transition temperature (Tg) on the heating rate (α). One is empirical linear relationship between (Tg) and ln(α). The second approach is the use of straight line ln(Tg2/α) vs. 1/Tg for the evaluation of the activation energy for glass transition. The phases at which the alloy crystallizes after the thermal treatment have been identified by using X-ray diffraction. The diffractogram of the transformed material shows the presence of some crystallites of As, Te, AsSb, As2Se3, Sb2Se3 and AsSe.5Te.5 in the residual amorphous matrix.