Synthesis and Thermoelectric Properties of the Ca and Sm Co-filled Skutterudites

doi:10.3724/SP.J.1077.2008.00710

Abstract

Abstract: Co-filled skutterudites Ca_mSm_nFe_xCo_4-xSb ₁₂were prepared by melting method and spark plasma sintering (SPS) technique, and the effects of filling amount and fraction of Ca and Sm on the thermoelectric properties of these compounds were investigated. For p-type Ca_mSm_nFe_xCo_4-xSb ₁₂, with the Ca and Sm co-filling amount increasing, the Seebeck coefficient increases, but the electrical conductivity and the thermal conductivity decrease. When the Ca and Sm co-filling amount is fixed, the electrical conductivity of skutterudites increases with increasing Ca filling fraction, the thermal conductivity decreases and the Seebeck coefficient increases with the increase of Sm filling fraction. At 775K, the highest figure of merit value of 0.85 is obtained for Ca_0.15Sm_0.24Fe_1.51Co_2.48Sb₁₂.

Key words: co-filling, skutterudites, thermoelectric properties

CLC Number:

TN304
TN337

LIU Tao-Xiang,TANG Xin-Feng,DENG Shu-Kang,SONG Chen,ZHANG Qing-Jie. Synthesis and Thermoelectric Properties of the Ca and Sm Co-filled Skutterudites[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00710.

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Synthesis and Thermoelectric Properties of the Ca and Sm Co-filled Skutterudites

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