MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Thermoelectric Properties of Single Crystalline B4C Prepared by a Floating Zone Method
Itaru GunjishimaTakaya AkashiTakashi Goto
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2001 Volume 42 Issue 7 Pages 1445-1450

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Abstract

High-purity single crystalline B4C, several cm in size, has been prepared by a Floating Zone method. The electrical conductivity, Hall mobility, Seebeck coefficient and thermal conductivity are measured from room temperature to 1023 K . The electrical conductivity is about four times higher than that of sintered B4C . The mobility has increased with increasing temperature, indicating hopping conduction of charge carriers. The Seebeck coefficient is 240–260 \\microVK−1, almost independent of temperature. The thermal conductivity is about twice higher than that of sintered B4C . The thermoelectric figure-of-merit is also higher than that of sintered B4C, being 4.2×10−5 K−1 at 1100 K.

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© 2001 The Japan Institute of Metals and Materials
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