THERMOELECTRIC PROPERTIES OF SELENIDES AND TELLURIDES OF GROUPS VB AND VIB METALS AND THEIR SOLID SOLUTIONS

Abstract

Seebeck coefficient, resistivity and thermal conductivity measurements were performed on tantalum-doped WSe2-type compositions containing mixed anions and/or cations; for example, W0.47Mo0.47Ta0.06SeTe. Such compositions had much lower thermal conductivities at room temperature than their less complex counterparts, but this advantage did not result in improved Figures of Merit, partly because electrical properties were inferior and partly because their high-temperature thermal conductivities approached that of WSe2. The tungsten-seleniumantimony phase diagram was found to contain no ternary phases of thermoelectric interest. Tantalum-doped tungsten diselenide thermoelements sealed in standard ceramic capsules were exposed to hot-end temperatures of 950 C for several hours without deterioration. Measurement of the thermoelectric parameters of NbSiGe in the 1000-1500 C range is in progress. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 30, 1962
Accession Number
AD0290728

Entities

People

  • H. Valdsaar
  • W.t. Hicks

Tags

DTIC Thesaurus Topics

  • Coefficients
  • Conductivity
  • Diagrams
  • Electrical Properties
  • High Temperature
  • Measurement
  • Metals
  • Phase
  • Phase Diagrams
  • Solid Solutions
  • Standards
  • Tantalum
  • Tellurides
  • Thermal Conductivity
  • Tungsten

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Polymer Science and Engineering.
  • Solar Photovoltaics and Thermoelectric Devices.