Abstract
Physical aging in amorphous Bi5Se95 system has been studied by using differential scanning calorimetry (DSC). The kinetics of physical aging was investigated by annealing the glass at similar to 20 degrees C below the glass transition temperature for different aging ( annealing) times (t(a)) ranging from 0.5 h to 163 h. It is observed that the endothermic enthalpic recovery temperature (T-p) and the enthalpy loss (Delta H) increase with increasing aging time. The effect of aging at different sub-T-g temperatures was studied and the usefulness of Kohlraush-Williams-Watts (KWW) function to describe the structural relaxation in Bi5Se95 during aging was investigated. The kinetic parameters that are commonly used to describe the relaxation processes were determined.