Thermoelectric properties of CeyFexCo4-xSb12 prepared by a solid state reaction

Xinfeng Tang, Lidong Chen, Takashi Goto, Toshio Hirai

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23 Citations (Scopus)

Abstract

The filled skutterudite compounds, CeyFexCo4-xSb12(x = 0-1.0, y = 0-0.15), were prepared from powders of Co, Fe, Sb and CeCl3·6H2O by solid state reaction, and their thermoelectric properties were investigated. CeyFexCo4-xSb12(x = 0-1.0, y = 0-0.15) compounds showed p-type conductivity. Carrier concentration (p) increased with increasing substitution Fe for Co site, and decreased with increasing Ce content. Electrical conductivity (σ) increased with increasing Fe content. The seebeck coefficient (α) increased with increasing Fe content for CeFexCo4-xSb12, but decreased with increasing Fe content for FexCo4-xSb12. Thermal conductivity (κ) decreased significantly with the substitution of Fe for Co and filling of Ce into Sb dodecahedron voids. The thermoelectric figure of merit was improved by the combination of Fe substitution and Ce filling. The maximum ZT value of 0.8 was obtained for Ce0.12Fe0.71Co3.29Sb12 at 750 K.

Original languageEnglish
Pages (from-to)1412-1415
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume63
Issue number11
DOIs
Publication statusPublished - 1999 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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