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Thermal expansion and network constraints in GeInSe glasses

Authors
Journal
Journal of Non-Crystalline Solids
0022-3093
Publisher
Elsevier
Publication Date
Volume
162
Issue
3
Identifiers
DOI: 10.1016/0022-3093(93)91249-3
Disciplines
  • Chemistry
  • Mathematics

Abstract

Abstract The linear thermal expansion coefficient, α, as a function of temperature is reported and discussed for GeInSe glasses. The study covered glasses with 5 and 8 at.% In and glasses across the GeSe 2In 2Se 3 tie line. Changes in slope of the α vs. the average coordination number, Z, are seen at Z values of ≅2.40 and ≅2.67. the α-temperature data of glasses with Z up to 2.40 are different from those with Z values between ≅2.40 to ≅2.67. Changes in slope are seen at Z values of ≅2.40 and ≅2.67 in the softening temperature, T s, vs. Z data. Peaks in T s are seen at Z values corresponding to lie line compositions of the families with In at 5 and 8 at.% which have Z values of 2.73 and 2.77, respectively. These results confirm the earlier conclusion, that in addition to features arising due to effects of topology, those due to local chemical ordering are also present.

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