Exploring the thermal stability of Sb₂Se₃ on Bi addition

Department of Physics and Materials Science, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, India

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Published online: 5 March 2026

Abstract

The thermal characteristics of (Sb₂Se₃)_100−xBi_x (x = 0, 0.4, 0.8, and 1.2) samples have been investigated via employing the differential scanning calorimetry (DSC) technique. The parameters transition temperature (T_g) of glass, melting temperature (T_m), and peak crystallization temperature (T_p) have been observed at a heating rate of 10 K/min. The rise in T_g with increasing Bi content signifies the enhanced rigidity of the structure. Dietzel's criterion (ΔT) and Hruby's parameter (K_gl) have been used to evaluate the thermal stability and glass-forming ability. The K_gl value, ranging between 0.395–0.791 in the study, indicates a good glass-forming tendency; the reduced glass transition temperature (T_rg), ranging between 0.693–0.744, suggests strong thermal stability. Among all the compositions, the x = 1.2 sample showed the maximum ΔΤ and an enhancement in T_g, T_p, and T_m. The study reveals that incorporating Bi into Sb₂Se₃ improves the thermal characteristics, demonstrating its potential for various advanced functional materials.