The role of doping and heating rate in optimizing the crystallization parameters of As35Se65-xSbx glasses

The present study reports the investigations of the pre-crystallization and amorphous-crystalline transformation kinetics of As35Se65-xSbx (0, 2 and 6 at. %) glasses. It was found that the Sb content controls many features of As35Se65-xSbx where it caused an increase in the glass transition from 409 to 416 K and a decrease in crystallization temperature from 626 to 607 K at heating rate 10 K/min−1 as an example, indicating the effect of Sb doping on the structure matrix of As35Se65-xSbx. The thermal stability parameters of As35Se65-xSbx glasses were increased from 172 to 174 K with increasing the Sb content from 2 to 6 at.%. In addition, the transition activation energy of the glass was evaluated with different methods, and it was found that it depends on the Sb amount as well as conversion fraction. The crystallization kinetics parameters, determined with iso-conversional methods, also were controlled by changing the composition. Both Sestak–Berggren (SB) and Johnson–Mehl–Avrami (JMA) models were applied for investigating the crystallization kinetics of As35Se65-xSbx glasses. Also, the theoretical results were compared with experimental results.