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Calorimetric studies on Ge(Se1-xSx)2 chalcogenide glasses

S. A. FAYEK1,* , M. M. IBRAHIM1

Affiliation

  1. National Center for Radiation Research and Technology, Cairo, Egypt

Abstract

Bulk glasses of the system Ge(Se1-xSx)2where x =0, 0.1, and1 are prepared by the known melt quenching technique. Nonisothermal differential thermal analysis (DTA) measurements of as quenched Ge(Se1-xSx)2 x = 0, 0.1, and1 chalcogenide glasses reveal that the characteristic temperatures e.g. the glass transition temperature (Tg), the temperature corresponding to the maximum crystallization rate (Tp) are recorded and strongly dependent on heating rate and compositions. Upon heating these glasses show a single transition temperature (Tg) and (Tp).The activation energies of glass transition (Et ) and crystallization Ec are evaluated by different methods. Most of the above mentioned glassy compounds have twodimensional growth mechanism, according to the average value of avrami index (n). The calculated average values of activation energies of crystallization are used for the estimation of the thermal stability as well as the glass- forming tendency..

Keywords

Chalcogenide, Ge-S-Se, Calorimetry.

Submitted at: Dec. 7, 2009
Accepted at: Feb. 18, 2010

Citation

S. A. FAYEK, M. M. IBRAHIM, Calorimetric studies on Ge(Se1-xSx)2 chalcogenide glasses, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 370-374 (2010)