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Journal of Materials Science

, Volume 18, Issue 3, pp 717–720 | Cite as

Electrical conductivity studies of some chalcogenide glasses over a large temperature range

  • T. C. Davey
  • E. H. Baker
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  • 60 Downloads

Abstract

The electrical conductivities of chalcogenide glasses, two of which contained selenium: Se15Ge23As31Te31 and Se15Ge33As27Te25, and two of which contained sulphur: S15Ge23As31Te31 and S15Ge33As27Te25, have been determined over the temperature range 20 to 1150‡ C. To prevent volatilization loss from the liquid glasses, the conductance cells were enclosed in an internally heated pressure vessel containing high-pressure argon. At the lowest temperatures the plots of logσ against 1/T(K) for the solid glasses were found to be linear, indicative of semiconductive behaviour. At temperatures just above the glass transition regions, these plots deviated from linearity and showed a marked upward curvature; this suggested that a conduction process, involving both metallic and semiconductive modes in the melt, was already operating. Comparison with the results for arsenic triselenide lent support to this idea. A similar study was carried out on the well-known switching glass, As30Te48Ge10Si12. In all cases, the liquid glasses showed metallic levels of conductivity at the highest temperatures.

Keywords

Arsenic Selenium Chalcogenide Glass Liquid Glass Upward Curvature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1983

Authors and Affiliations

  • T. C. Davey
    • 1
  • E. H. Baker
    • 1
  1. 1.Nuffield Research GroupImperial CollegeLondonUK

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