Crystal Structures and Thermoelectric Properties of Sm-Filled Skutterudite Compounds Smy Fex Co4 - x Sb12 |
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| Authors: | Liu Tang Xinfeng Xie Wenjie Yan Yonggao Zhang Qingjie |
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| Affiliation: | State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University ofTechnology , Wuhan 430070, China |
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| Abstract: | Polycrystalline samples of Sm partially filled skutterudites SmyFexCo4-xSb12 were prepared by melting and Spark Plasma Sintering technique.The results of Rietveld refinement showed that the obtained SmyFexCo4-xSb12 samples possessed filled skutterudite structures.The thermal parameter (B) of Sm is larger than that of Sb, Fe, and Co, indicating that Sm "rattled" in Sb-icosahedron voids.The effects of filling atom Sm on thermoelectric properties of these compounds were investigated.With the increase of Sm filling fraction (y), electrical conductivity decreased, Seebeck coefficient increased and had a maximum value when y was 0.38; thermal conductivity reduced and had a minimum value when y was 0.32.At 750 K, the highest figure of merit of 0.68 was obtained for Sm0.32Fe1.47Co2.53Sb12. |
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| Keywords: | skutterudite compound thermoelectric properties Sm filling rare earths |
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