Effect of the Germanium on the Crystallization Kinetics of Se-Te Glassy Alloy

Abstract

Differential Thermal Analysis (DTA) has been employed to investigate the glass transition activation energy E_t , thermal stability and glass forming ability (GFA) of (Se₈₀Te₂₀)_100-xGe_x (x = 0, 2, 4, 6) chalcogenide glasses. The DTA curves of the composition under investigation were recorded at the different heating rates. From the dependence of glass transition temperature on heating rate, the E_t has been calculated on the basis of the Kissinger model. Thermal stability has been monitored through the calculation of temperature differences T_c-T_g and the stability parameter S. The GFA has been investigated on the basis of Hruby parameter H_r , which is a strong indicator of GFA.

Keywords:

• Glass transition temperature
• activation energy
• thermal stability
• GFA

Acknowledgment

Authors are thankful S. S. Bhatt, Department of chemistry, H. P. U. Shimla and to UGC, New Delhi and DST, Govt. of India for providing necessary instrumentation facilities in the form of SAP and FIST program.