High Temperature Thermoelectric Properties of Boron Carbide

Aselage, T. L.

doi:10.1557/proc-234-145

High Temperature Thermoelectric Properties of Boron Carbide

Conference · Sat Jun 01 04:00:00 EDT 1991 · Materials Research Society Symposia Proceedings

DOI:https://doi.org/10.1557/proc-234-145· OSTI ID:5689579

Aselage, T. L. ^[1]

Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

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.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)

DOE Contract Number:: AC04-76DP00789

OSTI ID:: 5689579

Report Number(s):: SAND--90-3080C; CONF-910406--31; ON: DE91015848

Conference Information:: Journal Name: Materials Research Society Symposia Proceedings Journal Volume: 234

Country of Publication:: United States

Language:: English

References (14)

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36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
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BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CRYSTAL STRUCTURE
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ELECTRICAL PROPERTIES
PHYSICAL PROPERTIES
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
THERMOELECTRIC PROPERTIES
VERY HIGH TEMPERATURE

High Temperature Thermoelectric Properties of Boron Carbide

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References (14)

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