Browse > Article

Electrical Properties of n-type Co-doped Fe-Si Alloy  

Pai, Chul-Hoon (Department of Material Science and Engineering, University of Incheon)
Kim, Jeung-Gon (Division of Mechatronics, Incheon City College)
Publication Information
Korean Journal of Metals and Materials / v.47, no.12, 2009 , pp. 860-865 More about this Journal
Abstract
The effect of Co additive on the electrical 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 the temperature under an Ar atmosphere to evaluate their applicability to thermoelectric energy conversion. The electrical conductivity of the specimens increased as the temperature increased, showing typical semiconducting behavior. The electrical conductivity of Co-doped specimens was higher than that of undoped specimens and increased slightly as the amount of Co additive increased. This is most likely due to the difference in the carrier concentration and the amount of residual metallic phase ${\varepsilon}$-FeSi (The ${\varepsilon}$-FeSi was detected in spite of an annealing treatment of 100 h at $830^{\circ}C$). Additionally, metallic conduction increased slightly as the amount of Co additive increased. On the other hand, Co-doped specimens showed a lower Seebeck coefficient due to the metallic phase. The power factor of Co-doped specimens was higher than that of undoped specimens. This would be affected more by the electrical conductivity compared to the Seebeck coefficient.
Keywords
Co-doped Fe-Si alloy; electrical conductivity; Seebeck coefficient; power factor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 2
연도 인용수 순위
1 C. H. Pai, T. H. Song and H. L. Lee, J. Ceram. Soc. Jpn. 109, 386 (2001)   DOI   ScienceOn
2 Y. Nakagiri, H. Gyoten, F. Nishiwaki, and Y. Yamamoto, J. Ceram. Soc. Jpn. 100, 941 (1992)   DOI
3 S. Tokita, T. Amano, M. Okabayashi, and I. Nishida, Proc. of the 12th Int. Conf. on Thermoelectric Energy Conversion, p.197-200, Yokohama (1993)
4 U. Birkholz and J. Schelm, Phys. Stat. Sol. 27, 413 (1968)   DOI
5 T. MiKi, Y. Matsui, K. Matsubrara, K. Kishimoto, K. Nagao and I. Fujji, Proc. of the 12th Int. Conf. on Thermoelectric Energy Conversion, p.29-33, Yokohama(1993)
6 Y. Isoda, T. Ohkoshi, I. Nishida, and H. Kaibe, J. Mat. Sci. Soc. Jpn. 25, 311 (1989)
7 S. C. Ur and I. H. Kim, Met. and Mater. Int. 11, 301 (2005)   DOI   ScienceOn
8 K. Matsubara and T. Koyanagi, Proc. of the 5th Int. Conf. on Thermoelectric Energy Conversion, p.1-6 Arlington(1986)
9 T. Kojima, M. Okamoto, and I. Nishida, Proc. of the 5th Int. Conf. on Thermoelectric Energy Conversion, p.56-61, Arlington (1984)
10 I. B. Cadoff and E. Miller, Thermoelectric Materials and Devices, p.173-83, Chapman and Hall Ltd., London(1960)
11 C. H. Pai and H. J. Park, J. Kor. Inst. Met. & Mater. 46, 315(2008)
12 T. Kojima, K. Masumoto and I. Nishida, J. Japan Inst. Met, 48, 843 (1984)
13 T. Sakata, Y. Sakai, H. Yoshino and H. Fuji, J. Less-Com. Met. 61, 301 (1978)   DOI   ScienceOn
14 D. M. Rowe and C. M. Bhandari, Modern Thermoelectrics, p.35-48, Holt, Rinehart and Winston Ltd., London (1983)