Calorimetric Studies of the Crystallization Growth Process in Glassy Se70Te30-xAgx Alloys

Authors : N MEHTA, D KUMAR, A KUMAR

Pages : 397-406

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Differential Scanning Calorimetry insert ignore into journalissuearticles values(DSC); is performed at different heating rates under non-isothermal conditions to study the crystallization kinetics of Se.70Te.26Ag.04 and Se.70Te.24Ag.06 chalcogenide glasses in terms of the activation energy of nucleation and growth process. To understand the nucleation and growth process, the values of the growth morphology parameter n and the numerical factor m of crystallization mechanism have been evaluated using different non--isothermal methods. The values of n and m have been found to be nearly equal, indicating that the present glasses have sufficient nuclei before DSC experiment and the activation energy for nucleation process EN is zero. Hence, the effective activation energy for overall crystallization Ec is equal to the activation energy for growth process EG.
Keywords : Chalcogenide glasses, Differential Scanning Calorimetry, Crystallization Kinetics