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Synthesis and Thermoelectric Properties of CoP3

Published online by Cambridge University Press:  21 March 2011

Virgil B. Shields  and
Thierry Caillat
Virgil B. Shields
Affiliation:
Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109, USA
Thierry Caillat
Affiliation:
Jet Propulsion Laboratory California Institute of Technology Pasadena, CA 91109, USA
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Abstract

In an effort to expand the range of operation for highly efficient, segmented thermoelectric unicouples currently being developed at the Jet Propulsion Laboratory (JPL), skutterudite phosphides are being investigated as potential high temperature segments to supplement antimonide segments that limit the use of these unicouples at a hot-side temperature of about 873-973 K. We report here on the synthesis and transport properties of one of these phosphide skutterudite materials, CoP3. Large amounts of cobalt triphosphide have been prepared by direct reaction from stochiometric powders at synthesis temperatures ranging from 873 to 1223 K. The synthesized powders were analyzed by x-ray diffractometry and hot pressed at 1273 K. The samples were analyzed by microprobe analysis and electrical conductivity, Seebeck voltage and thermal conductivity measurements were performed. The thermoelectric properties are presented and discussed as a function of temperature up to 1000 K. Initial thermal stability results are presented to assess the potential of this material for high temperature operation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 691: Symposium G – Thermoelectric Materials 2001--Research and Applications , 2001 , G2.5
Copyright
Copyright © Materials Research Society 2002

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References

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