Thermoelectric Properties of CeFe_3CoSb_<12>-FeSb_2 Composite

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概要

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• We have prepared a sintered CeFe3CoSb12-FeSb2 composite and investigated the Seebeck coefficient, electrical resistivity, and thermal conductivity in order to estimate the corresponding figure of merit. The thermal conductivity of the composite whose molar ratio of CeFe3CoSb12 to FeSb2 is 0.9:0.1 is as large as that of CeFe3CoSb12 while the lattice contribution of the thermal conductivity of the composite is somewhat smaller than that of CeFe3CoSb12, which is ascribed to the enhancement of the phonon scattering caused by the additive material. With increasing FeSb2 content the thermal conductivity of the composite is enhanced. The Seebeck coefficient and electrical resistivity of the composite generally decrease with increasing FeSb2 content. These behaviors in the thermal conductivity, Seebeck coefficient and electrical resistivity with increasing FeS2 content is considered to be ascribed to the physical properties of FeSb2. As a result, the composite whose molar ratio of CeFe3CoSb12 to FeSb2 is 0.9:0.1 shows somewhat larger figure of merit than CeFe3CoSb12 in the whole temperature range from 373K to 773K.

• 社団法人粉体粉末冶金協会の論文
• 2007-01-15

著者

• Katsuyama Shigeru

  Division Of Materials And Manufacturing Science Graduate School Of Engineering Osaka University

• NISHIMURA Hiroshi

  Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University

• Nishimura Hiroshi

  Division Of Materials And Manufacturing Science Graduate School Of Engineering Osaka University

関連論文

• Special Issue on Thermoelectric Conversion Materials V
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• Synthesis of Ca_3Co_4O_9 Ceramics by Citric Acid Complex and Hydrothermal Hot-Pressing Processes and Investigation of Its Thermoelectric Properties
• Special Issue on Thermoelectric Conversion Materials VII

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