Kinematical studies of the glass transition in glassy Se80-xTe20Sbx

The present paper reports kinematic studies of the glass transition in glas sy Se80-xTe20Sbx alloys using the differential scanning calorimetric techni que. The glass transition temperature (T-g) is found to increase monotonica lly with the heating rate. T-g also increases with the increase of Sb conce ntration in ternary Se80-xTe20Sbx system. From the heating rate dependence of glass transition temperature, the activation energy (Delta E-t) for the relaxation time controlling the structural enthalpy, is calculated. The com position dependence of T-g and Delta E-t is discussed in terms of the struc ture of the Se-Te-Sb glassy system. (C) 2000 Kluwer Academic Publishers.