Thermoelectric Properties of CexCo4Sb12 Prepared by MA-SPS
来源期刊：JOURNAL OF RARE EARTHS2004年第3期
论文作者：周美玲 张久兴 刘科高 张隆 路清梅 刘丹敏
Key words：thermoelectric material; mechanical alloying; spark plasma sintering; CexCo4Sb12; rare earths;
Abstract: 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 ℃.
周美玲1，张久兴1，刘科高1，张隆1，路清梅1，刘丹敏1
(1.The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China)
Abstract: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 ℃.
Key words:thermoelectric material; mechanical alloying; spark plasma sintering; CexCo4Sb12; rare earths;
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