Crystallization study of Te-Bi-Se glasses

Crystallization studies are carried out under non -isothermal conditions with samples heated at several uniform rates. The dependence of the glass transition te mperature (Tg), the crystalline temperature (Tc) and the peak temperature of crystallization ( Tp) on the composition and heating rate (β) has been studied. For a memory/switching material, the thermal stability and ease of glass formation are of crucial impo rtance. The glass transition temperature, Tg, increases slightly with the vari ation of Bi content. From the heating rate dependence of Tg, the activation energy for glass transition ( Et) has been evaluated. The results are discussed on the basis of Kis singer's approach and are interpreted using the chemically ordered network model (CONM).