Thermoelectric Properties of P -Type BaSnO3 Ceramics Doped with Cobalt

DOI Web Site 参考文献27件
  • Yasukawa Masahiro
    Department of Materials Science and Engineering, Kochi National College of Technology
  • Hamada Yukihiro
    Department of Materials Science and Engineering, Kochi National College of Technology
  • Kono Toshio
    Kochi Prefectural Industrial Technology Center
  • Ueda Kazushige
    Department of Materials Science, Kyushu Institute of Technology
  • Yanagi Hiroshi
    Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
  • Kim Sung Wng
    Frontier Research Center, Tokyo Institute of Technology
  • Hosono Hideo
    Frontier Research Center, Tokyo Institute of Technology Materials and Structures Laboratory, Tokyo Institute of Technology

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Perovskite-type BaSn1-xCoxO3-δ ceramics were prepared by a solid state reaction, and the electrical conductivity σ and Seebeck coefficient S were measured in the temperature range 373-1073 K to evaluate the thermoelectric power factors S2σ. Dense ceramics with relative densities of ∼98 % were obtained by firing at 1573 K for the BaSn1-xCoxO3-δ with x=0.03-0.15. Temperature dependence of σ and S showed that the BaSn1-xCoxO3-δ ceramics with x=0.03-0.15 were p-type semiconductors. A possible origin of the p-type conduction is hopping of holes between localized states of Co ions. The S2σ values were in the orders of 10-11-10-7 Wm-1K-2 and the highest value was 2.7×10-7 Wm-1K-2 at 1073 K for x=0.15.

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