The crystallization process of Se87.5 Te10 Sn2.5 glassy was studied by differential thermal analysis (DTA)
technique under non-isothermal condition at various heating rates. The crystallization parameters were calculated
using different models. The validity of the Johnson–Mehl–Avrami (JMA) model to describe the crystallization
process for the studied composition was discussed. Results obtained by directly fitting the
experimental DTA data to the calculated DTA curves indicate that the crystallization process of Se87.5 Te10
Sn2.5 glass cannot be satisfactorily described by the JMA model. On the other hand, kinetic parameters of
both the peak crystallization temperature Tp and the glass transition temperature Tg are significantly
influenced by the heating rate. Simulation results indicate that the Sestak–Berggren (SB) model is more suitable
to describe the crystallization kinetics. The crystalline phases were identified by using X-ray diffraction
technique (XRD) and scanning electron microscopy (SEM).