Thermal stability and glass transition kinetics in GeTeSb glasses by using non-isothermal measurement

Abstract

In this paper we have analysed the thermal properties of three different compositions of chalcogenide glasses Ge15Te85-xSbx (x=0.5, 1, 1.5). The samples have been prepared using the melt quenching technique and the characterisation is done using X-ray diffraction. The compositional dependence on properties were studied using Differential Scanning Calorimetry (DSC) analysis using non-isothermal measurement. The glassy sample crystallized by two transition temperatures Tg1 and Tg2.The dependence of glass transition temperature on heating rate has been studied by Lasocka empirical relation and the Kissinger equation. As a result, the apparent activation energy for glass transition has been determined. Thermal stability has also been determined from the temperature difference between the onset crystallization and glass transition temperature.

Alteration on the chemical durability of tellurite glass: effect of heat treatment

“…Determination of the thermal stability for non-heat-treated glass (TZNE glass) is important to identify the specific range of operating temperatures that stimulates the crystallization process in glass and implies resistance against crystallization of glass through the nucleation and growth process [15,16]. Figure 1 shows the DTA curves of glass sample without heat treatment (TZNE glass) in the range of 01000 ᵒC.…”