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J. Korean Ceram. Soc. > Volume 47(5); 2010 > Article
Journal of the Korean Ceramic Society 2010;47(5): 457.
doi: https://doi.org/10.4191/kcers.2010.47.5.457
SmCoO3 페롭스카이트 계 열전소재에서 Fe2O3 첨가제가 출력인자에 미치는 영향
정광희, 최순목, 서원선, 박형호1
한국세라믹기술원 그린세라믹본부
1연세대학교 신소재공학과
An Effect of Fe2O3 Additive on a Seebeck Coefficient and a Power Factor for SmCoO3 Perovskite System
Kwang-Hee Jung, Soon-Mok Choi, Won-Seon Seo, Hyung-Ho Park1
Energy Materials Center, Green Ceramics Divsion., Korea Institute of Ceramic Engineering and Technology (KICET)
1Department of Materials Science and Engineering, Yonsei University
$SmCoO_3$ 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 $1.49times10^{-4}$ W/$mK^2$ at $550^{circ}C$.
Key words: Themoelectrics, $SmCoO_3$, Perovskite, $Fe_2O_3$, p-type semiconductor
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