The crystallization process of Se77.5Te15Sb7.5 glass is studied by differential scanning
calorimetry (DSC) technique under non-isothermal conditions at various heating rates.
The crystallization parameters are deduced using different models. The validity of the
Johnson
Mehl
Avrami (JMA) model to describe the crystallization process for the
studied composition is investigated. Comparing experimental and calculated DSC
curves indicate that the crystallization process of Se77.5Te15Sb7.5 glass cannot
satisfactorily be described by the JMA model. In general, simulation results indicate
that the Sestak
Berggren model is more suitable to describe the crystallization
kinetics. The crystalline phases are identified using the X-ray diffraction technique
and scanning electron microscopy.