Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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An Effect of Fe2O3 Additive on a Seebeck Coefficient and a Power Factor for SmCoO3 Perovskite System

SmCoO3 페롭스카이트 계 열전소재에서 Fe2O3 첨가제가 출력인자에 미치는 영향

  • Jung, Kwang-Hee (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Choi, Soon-Mok (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Seo, Won-Seon (Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET)) ;
  • Park, Hyung-Ho (Department of Materials Science and Engineering, Yonsei University)
  • 정광희 (한국세라믹기술원 그린세라믹본부) ;
  • 최순목 (한국세라믹기술원 그린세라믹본부) ;
  • 서원선 (한국세라믹기술원 그린세라믹본부) ;
  • 박형호 (연세대학교 신소재공학과)
  • Received : 2010.05.31
  • Accepted : 2010.07.28
  • Published : 2010.09.30
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Abstract

$SmCoO_3$ system was investigated for their application to themoelectric materials. All specimens showed p-type semiconducting behavior and their electrical conductivity ($\sigma$), Seebeck coefficient (S) and power factor were measured at high temperature. And the effect of dopant ions on their thermoelectrical properties were also investigated. $Fe^{3+}$ ion doped into $Co^{3+}$ site enhanced the Seebeck coefficient and decreased the electrical conductivity simultaneously. The maximum Seebeck coefficient value for 60% doping case reached to 780 ${\mu}V$/K at $240^{\circ}C$. However $Fe^{3+}$ doped system cause an negative effect on power factor value. In case of the pure phase, the maximum Seebeck coefficient value reached to 290 ${\mu}V$/K at $240^{\circ}C$ and the maximum electrical conductivity was obtained 748 1/(ohm$\times$cm) at $960^{\circ}C$. As a result, the maximum power factor was obtained $1.49\times10^{-4}$ W/$mK^2$ at $550^{\circ}C$.

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References

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