Calorimetric studies in glassy Se80−xTe20Inx

Abstract

Kinematical studies of glass transition and crystallization in glassy Se80−xTe20Inx are made using DSC technique. From the heating rate dependence of the glass transition and crystallization temperatures the activation energy, ΔEt, for the relaxation time controlling the structural enthalpy as well as the activation energy of crystallization, ΔEc, are calculated which are found to be minimum for x = 15. This is explained in terms of the structure of Se–Te–In glasses.

STUDY OF GLASS TRANSITION KINETICS FOR Co66Si12B16Fe4Mo2 METALLIC GLASS

“…In other words, activation energy is responsible for molecular motions and rearrangements of the atoms around the glass transition temperature. 22 The main benefit of using kinetics of glass transition is that one can determine activation energy for the given metallic glassy alloy at glass transition temperature which is lower than the crystallization peak temperature. That means, for any given system if the data of crystallization is not available or not in the experimental range of the instrument, still one can get the idea about thermal stability of that system.…”

Effect of CsI addition on the thermal properties, crystallization kinetics and short-wavelength absorption edges of GeSe2–Ga2Se3 glasses

“…Concerning E t , it is absorbed by a group of atoms in the glass region when a jump from one metastable state to another is possible [12]. In other words, E t is involved in the molecular motions and rearrangements of the atoms around the glass transition temperature [13]. When the sample is reheated in the DTA furnace, the atoms undergo infrequent transitions between the local potential minima separated by different energy barriers in the configuration space where each local minimum represents a different structure.…”

Recent advancement in metal containing multicomponent chalcogenide glasses

“…It means atoms possess− ing minimum activation energy and having a higher proba− bility to jump into a metastable state of lower internal energy [89]. Thus, the activation energy of the glasses is the amount of energy which was absorbed by a group of atoms for a jump from one metastable state to another state [89,90]. Usually activations' energies of the glasses descri− bed at the glass transition, onset crystallization and peak crystallization critical temperatures.…”