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High Temperature Thermoelectric Properties of Boron Carbide

Published online by Cambridge University Press:  15 February 2011

T. L. Aselage
T. L. Aselage*
Affiliation:
Division 1842, Sandia National Laboratories, Albuquerque, NM 87185-5800
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Abstract

Boron carbides are refractory solids with potential for application as very high temperature p-type thermoelectrics in power conversion applications. The thermoelectric properties of boron carbides are unconventional. In particular, the electrical conductivity is consistent with the thermally activated hopping of a high density (≈ 1021/cm3) of bipolarons; the Seebeck coefficient is anomalously large and increases with increasing temperature; and the thermal conductivity is surprisingly low. In this paper, these unusual properties and their relationship to the unusual structure and bonding present in boron carbides are reviewed. Finally, the potential for utilization of boron carbides at very high temperatures (up to 2200°C) and for preparing n-type materials is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 234: Symposium V – Modern Perspectives on Thermoelectrics and Related Materials , 1991 , 145
Copyright
Copyright © Materials Research Society 1991

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References

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