Recent Progress in Thermoelectric Oxide Ceramics

DOI
  • OHTAKI Michitaka
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, JST/CREST, JAPAN

Description

Innovative progress in oxide thermoelectric materials during the last decade is reviewed. Two strategies for overcoming unfavorable ionic characters of oxides will be presented: 1) achieving high carrier mobility in oxides; 2) profiting from localization and/or correlation of conduction electrons. Zinc oxide and sodium cobaltite are highlighted as the representatives, which respectively show the highest n- and p-type ZT values. The large power factor of Al-doped ZnO, being well comparable to those of the conventional materials such as PbTe and Si-Ge, would be attributed to relatively high carrier mobilities of the oxide mainly due to the covalent characters of the Zn-O bond. Attempts to suppress the unfavorably high phonon thermal conductivity of the ZnO crystal lattice are also introduced. The outstanding p-type thermoelectric properties of NaCo2O4 and a further advance in the performance by controlling the non-stoichiometry of the oxide will be discussed.

Journal

Details 詳細情報について

  • CRID
    1390282680588184320
  • NII Article ID
    130006967175
  • DOI
    10.14853/pcersj.2003f.0.420.0
  • Text Lang
    en
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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