Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Thermoelectric properties of La(1-x)MxCoO3(M=Sr, Ca;x=0, 0.1) ceramics for thermal sensors

  • 강민규 (고려대학교 전기전자공학과) ;
  • 조광한 (한양대학교 대학원 물리학과) ;
  • 강종윤 (KIST 박막재료연구센터) ;
  • 김진상 (한국과학기술연구원 박막재료연구센터) ;
  • 김상식 (고려대학교 공과대학 전기전자전파공학부) ;
  • 윤석진 (한국과학기술연구원 박막재료연구센터)
  • Published : 2009.05.31
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Abstract

We have investigated the effects of dopant on the thermoelectric properties that $La_{(1-x)}M_xCoO_3$(M=Sr, Ca;x=0, 0.1) bulk ceramics fabricated by the conventional solid state reaction method. The Seebeck coefficient of $La_{(1-x)}M_xCoO_3$(M=Sr, Ca;x=0, 0.1) bulk ceramics was measured at wide temperature range from 300 K to 673 K. The thermoelectric properties(Seebeck coefficient and electrical resistivity) depend strongly on the kinds of dopants. Sr and Ca dopant decrease the Seebeck coefficient. Density of sintered $La_{0.9}Sr_{0.1}CoO_3$ ceramic at 1523 K was 7.12 $g/cm^2$ and Seebeck coefficient was 35 ${\mu}V/K$ at 663 K. However, the electrical resistivity of the Sr doped sample was low and stable.

Keywords

References

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