Kinetic Study of Non-Isothermal Crystallization in Se_90-xZn₁₀Sb_x (x = 0, 2, 4, 6) Chalcogenide Glasses

Abstract

Crystallization and glass transition kinetics of Se 90-x Zn 10 Sb x (x = 0, 2, 4, 6) chalcogenide glasses prepared by conventional melt-quenching technique were studied under non-isothermal condition using a differential scanning Calorimeter (DSC) measurement at different heating rates 5, 7, 10 and 12° C /min. The glass transition temperatures T g , the crystallization temperatures T c and the peak temperatures of crystallization T p were found to be dependent on the compositions and the heating rates. From the dependence on the heating rates of T g and T p , the activation energy for glass transition, E g , and the activation energy for crystallization, E c , are calculated and their composition dependence is discussed. The activation energy of glass transition E g , Avrami index n , dimensionality of growth m and activation energy of crystallization E c have been determined from different models .