Thermal decomposition and kinetic parameter of Bridgman-grown In2Se3− x Sb x (x = 0.3) single crystal

Abstract

The thermal analysis of the vertical Bridgman-grown In2Se2.7Sb0.3 single crystals was carried out by recording the Thermogravimetric (TG), Differential Thermogravimetric (DTG), and Differential Thermal Analysis (DTA) curves. All three thermo-curves were recorded simultaneously by a thermal analyzer in the temperature range of ambient (300 K) to 923 K in the air atmosphere. The thermo-curves were recorded for single heating rates of 10 K/min. The thermal kinetic parameters of the vertical Bridgman-grown In2Se2.7Sb0.3 single crystals were determined employing the non-mechanistic H-M (Horowitz and Metzger), P-N (Piloyan-Novikova), C-R (Coats-Redfem), and Broido relation from TGA and PRN (Piloyan, Ryabchikov, and Novikova) and BD (Borchardt and Daniels) relation from DTA curves. The determined kinetic parameters support the observations of the thermo-curves.