Effect of Antimony (Sb) incorporation on physical parameters of Te15 (Se100-xSbx)85 glassy alloys

Abstract

In the present study the physical parameters of Te₁₅ (Se_100-xSb_x)₈₅ glassy alloys prepared by melt quenching technique have been reported. The parameters viz. average coordination number (<r>),  average number of constraints (N_con), number of lone pair electrons (L), mean bond energy( <E>), cohesive energy (CE), average heat of atomization (H_s),  glass transition temperature (T_g), density (ρ) and  energy gap (E_g) were calculated theoretically for the glassy alloys. The mean bond energy and the cohesive energy have been evaluated using the chemical bond approach (CBA). The glass transition temperature was calculated using Tichy-Ticha approach and has been found to increase with Sb content. The mean bond energy is found proportional to glass transition temperature and average coordination number. It has been found that the average coordination number, average number of constraints, mean bond energy, density, average heat of atomization and glass transition temperature increases and cohesive energy, theoretical energy gap decreases with increasing Sb content in Se-Te alloys.

Keywords:  Mean bond energy, density, cohesive energy, glass transition temperature and energy gap.