Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Thermoelectric Properties of Mn-doped FeSi2

Mn 첨가 FeSi2의 열전변환특성

  • Pai, Chul-Hoon (Department of Material Science and Engineering, University of Incheon) ;
  • Park, Hyoung-Jin (University of Incheon Technology Innovation Center (ITIC))
  • 배철훈 (인천대학교 공과대학 신소재공학과) ;
  • 박형진 (인천대학교 기계전자기술혁신센터)
  • Received : 2008.02.22
  • Published : 2008.05.22
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Abstract

The effect of Mn additive on the thermoelectric properties of Fe-Si alloys prepared by a RF inductive furnace was investigated. The electrical conductivity and Seebeck coefficient were measured as a function of temperature under Ar atmosphere to evaluate their applicability to thermoelectric energy conversion. The electrical conductivity of the specimens increased with increasing temperatures showing typical semiconducting behavior. The electrical conductivity of Mn-doped specimens are higher than that of undoped specimens and increased slightly with increasing the amount of Mn additive. This must be due to the difference in carrier concentration and the amount of residual metallic phase ${\varepsilon}$-FeSi(The ${\varepsilon}$-FeSi was detected in spite of 100 h annealing treatment at $830^{\circ}C$). And metallic conduction increased slightly with increasing the amount of Mn additive. On the other hand, Mn-doped specimens showed the lower Seebeck coefficient due to metallic phase. The power factor of Mn-doped specimens are higher than that of undoped specimens and would be affected by the electrical conductivity more than Seebeck coefficient.

Keywords

Acknowledgement

Supported by : 인천대학교

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