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Thermal Conductivity of Tellurium Dioxide Single Crystals

  • K. A. McCarthy
  • H. H. Sample

Abstract

Tellurium dioxide is a material of interest for acousto-optic devices. Measurements of the thermal conductivity of single crystals of tellurium dioxide have been made in the 1.5–100 K temperature range. The crystals on which these measurements were made have tetragonal (paratellurite) structure; its elastic behavior is characterized by an unusually slow shear wave in the <110> direction.

Measurements were made with the heat flow direction parallel to the c-axis and with heat flow along a <110> direction. For heat flow parallel to the c-axis, KPEAK equals 16.4 watt/cm K at 5 K; for heat flow perpendicular to the c-axis, KPEAK equals watt/cm K at 5 K. Although the samples came from two different sources, we believe that there is an orientation dependence of K in this anisotropic material.

These results will be compared with our recent measurements on single crystals of thallium arsenic selenide (TAS or Tl3AsSe3), also a material with interesting acousto-optic properties. This material has a trigonal structure, and is one member of the ternary chalcogenide salt group that does not have a very slow shear mode velocity. Measurements made with heat flow both parallel and perpendicular to the c-axis are only slightly different.

Keywords

Thermal Conductivity Shear Wave Heat Flow Elastic Behavior Anisotropic Material 
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.

Copyright information

© Purdue Research Foundation 1985

Authors and Affiliations

  • K. A. McCarthy
    • 1
  • H. H. Sample
    • 1
  1. 1.Department of PhysicsTufts UniversityMedfordUSA

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