High temperature thermoelectric properties of Ca1-xBixMn1-yV yO3-δ (0≤x=y≤0.08)

X. Y. Huang, Y. Miyazaki, T. Kajitani

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63 Citations (Scopus)

Abstract

CaMnO3-δ with complex additives Bi2O3-V 2O5 were prepared by the solid-state reaction. The crystal structures of the Ca1-xBixMn1-yV yO3-δ (0≤x=y≤0.08) solid solutions were determined by means of the powder X-ray diffraction (XRD) using Rietan 2000 program and the high temperature thermoelectric properties were also investigated. Perovskite-type Ca1-xBixMn1-yV yO3-δ solid solutions are n-type semiconductors. The lattice parameters increase with increasing dopant level. The high temperature thermoelectric properties are improved due to Bi2O3-V 2O5 simultaneous doping. A maximum ZT value reaches to 0.21 for electron-doped Ca0.96Bi0.04Mn0.96V 0.04O3-δ at 1050 K, which is about twice as high as that of CaMnO3-δ. The thermal shock resistance at temperatures between 20 and 450 {ring operator}C is also highly improved.

Original languageEnglish
Pages (from-to)132-136
Number of pages5
JournalSolid State Communications
Volume145
Issue number3
DOIs
Publication statusPublished - 2008 Jan

Keywords

  • A. Semiconductors
  • D. Electronic transport
  • D. Thermoelectric properties

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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