A Study of the Physical Properties of Te15(Se100-xBix)85 Glassy Alloys

Kumar, Kameshwar; Thakur, Nagesh; Katyal, S.C.; Sharma, Pankaj

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Home > Defect and Diffusion Forum > Defects and Diffusion in Metals XII > A Study of the Physical Properties of...

Paper Title:

A Study of the Physical Properties of Te₁₅(Se_100-xBi_x)₈₅ Glassy Alloys

Periodical	Defect and Diffusion Forum (Volumes 305 - 306)
Main Theme	Defects and Diffusion in Metals XII
Edited by	David J. Fisher
Pages	61-69
DOI	10.4028/www.scientific.net/DDF.305-306.61
Citation	Kameshwar Kumar et al., 2010, Defect and Diffusion Forum, 305-306, 61
Online since	October, 2010
Authors	Kameshwar Kumar, Nagesh Thakur, S.C. Katyal, Pankaj Sharma
Keywords	Chalcogenide Glasses, Cohesive Energy, Density, Glass Transition Temperature, Theoretical Energy Gap
Price	US$ 28,-

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Abstract

In the present communication, a study was made of the compositional variation of physical properties: average coordination number (), average number of constraints (Ncon), number of lone-pair electrons (L), mean bond energy (), cohesive energy (CE), average heat of atomization (Hs), glass transition temperature (Tg), density (ρ) and theoretical energy gap (Eg) for Te15(Se100-xBix)85 (x = 0, 1, 2, 3, 4, 5at%) glassy alloys. The mean bond energy and the cohesive energy have been calculated using the chemical bond approach (CBA). The glass transition temperature was calculated using the Tichy-Ticha approach, and has been found to increase with Bi content. The mean bond energy is found to be proportional to the glass transition temperature and the average coordination number. It has been found that the average coordination number, average number of constraints, mean bond energy and density increase, whereas the cohesive energy, average heat of atomization and theoretical energy gap decrease with increasing Bi content in Se-Te alloys.