Thermoelectric Properties of CexCo4Sb12 Prepared by MA-SPS

稀土学报(英文版), 2004, 22(3): 390-394.

刘科高 ^1, , 张久兴 ^2, , 路清梅 ^3, , 刘丹敏 ^4, , 张隆 ^5, , 周美玲 ^6,

1.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

2.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

3.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

4.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

5.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

6.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China

基金项目: 国家自然科学基金(50271001) 北京市教委科研项目(KZ200310005001)

Thermoelectric Properties of CexCo4Sb12 Prepared by MA-SPS

Keywords： thermoelectric material

Starting with elementary powders, thermoelectric materials CexCo4Sb12 were prepared by mechanical alloying and spark plasma sintering (MA-SPS). XRD analyses reveal that the expected major phase, named skutterudite was formed in MA process and was kept after SPS. The thermoelectric properties of MA-SPS samples including resistivity, Seebeck coefficient, power factor, thermal conductivity and the dimensionless figure of merit (ZT) were studied by varying Ce content and temperature. Depending on Ce levels, both P and N types of thermoelectric semiconductors were obtained. MA-SPS sintered Ce1.0Co4Sb12 exhibits the highest ZT in the range of 100～500 ℃ and the maximum ZT is found at x=1.0 and 400 ℃.

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Thermoelectric Properties of CexCo4Sb12 Prepared by MA-SPS

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