Thermoelectric Properties of (ZnO)<SUB>m</SUB>In<SUB>2</SUB>O<SUB>3</SUB>-Dependence of m(=1-19) and Effects of Doping (Ba, Ca, Sr, Sn, and Al)-

• KAGA Hisashi

  Toyota Central R&D Labs., Inc., JAPAN

• ASAHI Ryoji

  Toyota Central R&D Labs., Inc., JAPAN

• TANI Toshihiko

  Toyota Central R&D Labs., Inc., JAPAN

Abstract

Layered-structured homologous compounds (ZnO)_mIn₂O₃ (Z_mIO, m=integer) have been extensively studied for a candidate of n-type thermoelectric oxide material. Most of the studies focused on m=5, 7, and 9, and trivalent-ion doping for In site. In this study, we investigate the detailed dependence of m(=1-19) and doping effects of Ba²⁺, Ca²⁺, Sr²⁺, and Sn⁴⁺ for In site and of Al³⁺ for Zn site. The sintered specimens were formed in a single phase of Z_mIO (m=3-19) except Ba- and Sr-doped specimens and the densities reached more than 95% of TD. The thermal conductivity showed a minimum at m=5 and that of Ca-doped Z_mIO was about 10% smaller than that of pure Z_mIO. Carrier concentrations were changed by Ca- or Sn-doping, which, however, did not improve the power factor. The highest power factor, 5.18 x 10^-4 W/K²m (@780 °C), was obtained in pure Z₃IO.

Journal

• Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan

  Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan 2003F (0), 427-427, 2003

  The Ceramic Society of Japan

Details

• CRID: 1390282680588187520
• NII Article ID: 130006967180
• DOI: 10.14853/pcersj.2003f.0.427.0
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed