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Kinetic parameters of glass transition in glassy (Se80Ge20)100-xBix alloys

R. S. TIWARI1, N. MEHTA2, R. K. SHUKLA1, A. KUMAR1,*

Affiliation

  1. Department of Physics, Harcourt Butler Technological Institute, Kanpur, India
  2. Department of Physics, Pranveer Singh Institute of Technology, Kanpur, India

Abstract

Glass transition kinetics have been studied in glassy (Se80Ge20)100-xBix (x = 0, 2, 4) alloys under non–isothermal conditions using Differential Scanning Calorimetric (DSC) technique. The activation energy of glass transition (Et) has been evaluated using the heating rate dependence of glass transition temperature (Tg). The specific heat (∆Cp) of these alloys is also calculated and its temperature dependence has been discussed. The composition dependence of Tg and Et shows a reversal at 2 at %. The results are explained in terms of dependence of fragility of these glasses on the average coordination number..

Keywords

Chalcogenide glasses, Glass transition kinetics, Differential scanning calorimetry.

Submitted at: April 4, 2006
Accepted at: May 18, 2006

Citation

R. S. TIWARI, N. MEHTA, R. K. SHUKLA, A. KUMAR, Kinetic parameters of glass transition in glassy (Se80Ge20)100-xBix alloys, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1211-1215 (2006)