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A new concept of glass transition and modification of Johnson-Mehl-Avrami equation in chalcogenide glass Ge-Sb-Te

L. HEIRECHE1,* , M. BELHADJI1

Affiliation

  1. Oran-Es-Senia University, Physics Department, Algeria

Abstract

In this paper, a new concept of glass-crystal transition is proposed. It was found that the cooling rate has strong influence on the composition and crystallization process of chalcogenide glasses based in the system Ge-Sb-Te. We have modified the equation Johnson-Mehl-Avrami in order to evidence the crystallization fraction at peak maxima. The non-isothermal transition of Ge-Sb-Te has been investigated using different methods: Kissinger, Takhor, Augis and Bennett, Matusita and Sakka..

Keywords

DSC, Crystallization kinetics, Glass transition, Chalcogenide glasses, GeSbTe, Exciton.

Submitted at: April 29, 2009
Accepted at: Aug. 7, 2009

Citation

L. HEIRECHE, M. BELHADJI, A new concept of glass transition and modification of Johnson-Mehl-Avrami equation in chalcogenide glass Ge-Sb-Te, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 8, pp. 1058-1066 (2009)