Study of Extended Rigidity Percolation in Se-Te-Sn Glasses Using Dsc

The effect of addition of Sn on amorphous Se80 Te20 system has been studied using UV VIS NIR Spectrum. The samples are prepared by conventional melt quenching method. It has been found that the addition of Sn reduces the crystalline nature of Se80 Te20 chalcogenide alloy and amorphous samples are ob...

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Bibliographic Details
Main Authors: Sushama, D, George, Achamma, Predeep, P
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:The effect of addition of Sn on amorphous Se80 Te20 system has been studied using UV VIS NIR Spectrum. The samples are prepared by conventional melt quenching method. It has been found that the addition of Sn reduces the crystalline nature of Se80 Te20 chalcogenide alloy and amorphous samples are obtained for Se80-xTe20Snx(x = 0,2,4,6,8,10,15). The metal influences both the disordered network structure of the glass matrix and the transport properties in accordance with its chemical properties. The glass transition temperature and the crystallization temperatures show detectable changes at composition x = 4, 6 and 10. From the observed DSC results, it is seen that the compositions x = 4 and x = 6 denote the onset and completion of rigidity percolation and x = 10 corresponds to the chemical threshold of the system. The mean bond energy calculated using the covalent bond approach of Tichy and Ticha shows the same anomalies at x = 4, 6 and 10.
ISSN:0094-243X
DOI:10.1063/1.2927589