Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Thermoelectric Properties of $Sn_zCo_3FeSb_{12}$

$Sn_zCo_3FeSb_{12}$의 열전특성

  • Lee, Jae-Ki (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University) ;
  • Yoon, Seok-Yeon (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University) ;
  • Jung, Jae-Yong (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University) ;
  • Lee, Jung-Il (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University) ;
  • Ur, Soon-Chul (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University) ;
  • Kim, Il-Ho (Dept. of Materials Sci. & Eng./RIC-ReSEM, Chungju National University)
  • 이재기 (충주대학교 신소재공학과/친환경 에너지 부품소재센터) ;
  • 윤석연 (충주대학교 신소재공학과/친환경 에너지 부품소재센터) ;
  • 정재용 (충주대학교 신소재공학과/친환경 에너지 부품소재센터) ;
  • 이정일 (충주대학교 신소재공학과/친환경 에너지 부품소재센터) ;
  • 어순철 (충주대학교 신소재공학과/친환경 에너지 부품소재센터) ;
  • 김일호 (충주대학교 신소재공학과/친환경 에너지 부품소재센터)
  • Published : 2007.11.01
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Abstract

Sn-filled and Fe-doped $CoSb_3$ skutterudites were synthesized by encapsulated induction melting. Single ${\delta}$-phase was successfully obtained by subsequent annealing and confirmed by X-ray diffraction analysis. Temperature dependences of Seebeck coefficient, electrical resistivity and thermal conductivity were examined from 300 K to 700 K. The positive Seebeck coefficient confirmed the p-type conduction. Electrical resistivity increased with increasing temperature, which shows that the $Sn_zCo_3FeSb_{12}$ skutterudite is highly degenerate. Thermal conductivity was reduced by Sn-filling because the filler atoms acted as phonon scattering centers in the skutterudite lattice. Thermoelectric figure of merit was enhanced by Sn filling and its optimum filling content was considered to be z=0.3 in the $Sn_zCo_3FeSb_{12}$ system.

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