研究论文

Ca和Sm双原子共填充方钴矿化合物的制备及热电性能

  • 刘桃香 ,
  • 唐新峰 ,
  • 邓书康 ,
  • 宋 晨 ,
  • 张清杰
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  • 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070

收稿日期: 2007-09-06

  修回日期: 2007-10-24

  网络出版日期: 2008-07-20

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

  • LIU Tao-Xiang ,
  • TANG Xin-Feng ,
  • DENG Shu-Kang ,
  • SONG Chen ,
  • ZHANG Qing-Jie
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  • State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Received date: 2007-09-06

  Revised date: 2007-10-24

  Online published: 2008-07-20

摘要

用熔融法结合放电等离子快速烧结技术(SPS)制备了单相的Ca和Sm共填充的方钴矿化合物CamSmnFexCo4-xSb12, 研究了两种原子共填充总量及填充分量对其热电性能的影响规律. 结果表明: 随着Ca和Sm双原子共填充总量的增加, p型CamSmnFexCo4-xSb12化合物的Seebeck系数增大、电导率和热导率降低. 当共填充总量相近时, Ca原子填充分量较大的方钴矿化合物, 其电性能较好; 而Sm原子填充分量较大的方钴矿化合物, 其热导率较低、Seebeck系数较高. Ca0.15Sm0.24Fe1.51Co2.48Sb12化合物的最大热电性能指数ZTmax值在775K时为0.85.

本文引用格式

刘桃香 , 唐新峰 , 邓书康 , 宋 晨 , 张清杰 . Ca和Sm双原子共填充方钴矿化合物的制备及热电性能[J]. 无机材料学报, 2008 , 23(4) : 710 -714 . DOI: 10.3724/SP.J.1077.2008.00710

Abstract

Co-filled skutterudites CamSmnFexCo4-xSb 12 were 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 CamSmnFexCo4-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 Ca0.15Sm0.24Fe1.51Co2.48Sb12.

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