Calorimetric study of specific heat in glassy Se-Te-Sn-Bi system using MDSC technique: Effect of Bi incorporation

Abstract

Bismuth has historical significance as a modifier in chalcogenide glasses due to the p- to n-type transition at a particular composition of definite glassy systems after its incorporation. We have synthesized some new quaternary glasses using Bi as a modifier in ternary Se78Te20Sn 2 alloy as parent glass in light of this information. Modulated differential scanning calorimetry measurements have been made on glassy Se 78-x Te20Sn2Bix (0 ≤ x ≤ 6) alloys for specific heat studies. We have observed an expected enormously large increase in the specific heat values in the glass transition region. The composition dependence of specific heat values above the glass transition temperature (Cpe) and below the glass transition (Cpg) is also discussed in this article. © 2013 Copyright Taylor and Francis Group, LLC.