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CRYSTALLIZATION KINETICS OF SOME Se - Te - Ag CHALCOGENIDE GLASSES

N. Mehta1, M. Zulfequar2, A. Kumar1,*

Affiliation

  1. Department of Physics, Harcourt Butler Technological Institute Kanpur – 208 002, India
  2. Department of Physics, Jamia Milia Islamia, New Delhi-25, India

Abstract

The present paper reports the Differential Scanning Calorimetric (DSC) study of some Ag doped Se - Te chalcogenide glasses. DSC runs were taken at different heating rates. Well - defined endothermic and exothermic peaks were obtained at glass transition and crystallization temperatures. Three different methods have been used for the evaluation of activation energy of crystallization (Ec). The results show that the value of Ec is decreased due to addition of Ag in binary alloy Se70Te30. This decrease is explained in terms of mean atomic masses of ternary alloys. The compositional dependence of (Ec) in ternary alloys shows a reversal in the trend at 4 at. % of Ag, which is explained in terms of mechanically stabilized structure at this composition..

Keywords

Chalcogenide glass, DSC technique, Optical recording.

Submitted at: April 14, 2004
Accepted at: June 10, 2004

Citation

N. Mehta, M. Zulfequar, A. Kumar, CRYSTALLIZATION KINETICS OF SOME Se - Te - Ag CHALCOGENIDE GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 441-448 (2004)