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Investigation of Crystallization Kinetics in Glassy Se and Binary Se98M2 (M=Ag, Cd, Zn) Alloys Using DSC Technique in Non-Isothermal Mode

DOI: 10.4236/jcpt.2012.24025, PP. 167-174

Keywords: Differential Scanning Calorimetry, Crystallization Kinetics, Chalcogenide Glasses

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Abstract:

The crystallization kinetics of glassy Se and binary Se98M2 (M=Ag, Cd, Zn) alloys have been studied at different heating rates (5, 10, 15, 20 Kmin-1) using Differential Scanning Calorimetric (DSC) technique. The crystallization temperature (Tc) is determined from exothermic peak obtained in DSC scans of present samples. The variation in peak crystallization temperature (Tc) with the heating rate (β) has been used to investigate the growth kinetics using Kissinger, Augis-Bennet and Matusita-Sakka models. The activation energy of crystallization (Ec) has been found to increase with Ag additive and to decrease with Zn and Cd additive. The value of various kinetic parameters such as rate constant (Kp), Avrami index (n), thermal stability (S) and Hruby number (Hr) have been calculated under non-isothermal mode. The maximum change in different kinetic parameters has been found after the incorporation of Ag additive.

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