Enhanced thermoelectric properties of Co1-x-yNix+ySb3-xSnx materials

Hong-quan Liu, Sheng-nan Zhang, Tie-jun Zhu, Xin-bing Zhao, Yi-jie Gu, Hong-zhi Cui

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    Hong-quan Liu, Sheng-nan Zhang, Tie-jun Zhu, Xin-bing Zhao, Yi-jie Gu, and Hong-zhi Cui, Enhanced thermoelectric properties of Co1-x-yNix+ySb3-xSnx materials, Int. J. Miner. Metall. Mater., 19(2012), No. 3, pp.240-244. https://dx.doi.org/10.1007/s12613-012-0545-y
    Hong-quan Liu, Sheng-nan Zhang, Tie-jun Zhu, Xin-bing Zhao, Yi-jie Gu, and Hong-zhi Cui, Enhanced thermoelectric properties of Co1-x-yNix+ySb3-xSnx materials, Int. J. Miner. Metall. Mater., 19(2012), No. 3, pp.240-244. https://dx.doi.org/10.1007/s12613-012-0545-y
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    Enhanced thermoelectric properties of Co1-x-yNix+ySb3-xSnx materials

    • College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China

    • State Key Laboratory of Silicon Materials, Development of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

    基金项目: 

    This work was financially supported by the National Natural Science Foundation of China (Nos. 50801054 and 51072104) and the Research Award Fund for Outstanding Young Scientists in Shandong Province, China (No. BS2011CL031)

      通信作者:

      Hong-quan Liu E-mail: hq.liu666@yahoo.com.cn

    中文摘要

    Co1-x-yNix+ySb3-xSnx polycrystals were fabricated by vacuum melting combined with hot-press sintering. The effect of alloying on the thermoelectric properties of unfilled skutterudite Co1-x-yNix+ySb3-xSnx was investigated. A leap of electrical conductivity from the Co0.93Ni0.07Sb2.93Sn0.07 sample to the Co0.88Ni0.12Sb2.88Sn0.12 sample occurs during the measurement of electrical conductivity, indicating the adjustment of band structure by proper alloying. The results show that alloying enhances the power factor of the materials. On the basis of alloying, the thermoelectric properties of Co0.88Ni0.12Sb2.88Sn0.12 are improved by Ni-doping. The thermal conductivities of Ni-doping samples have no reduction, but their power factors have obvious enhancement. The power factor of Co0.81Ni0.19Sb2.88Sn0.12 reaches 3.0 mW·m-1·K-2 by Ni doping. The dimensionless thermoelectric figure of merit reaches 0.55 at 773 K for the unfilled Co0.81Ni0.19Sb2.88Sn0.12.

     

    Enhanced thermoelectric properties of Co1-x-yNix+ySb3-xSnx materials

    Author Affilications

      • College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China

      • State Key Laboratory of Silicon Materials, Development of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

    • Funds: 

      This work was financially supported by the National Natural Science Foundation of China (Nos. 50801054 and 51072104) and the Research Award Fund for Outstanding Young Scientists in Shandong Province, China (No. BS2011CL031)

    • Received: 17 March 2011; Revised: 19 June 2011; Accepted: 10 July 2011;
    Co1-x-yNix+ySb3-xSnx polycrystals were fabricated by vacuum melting combined with hot-press sintering. The effect of alloying on the thermoelectric properties of unfilled skutterudite Co1-x-yNix+ySb3-xSnx was investigated. A leap of electrical conductivity from the Co0.93Ni0.07Sb2.93Sn0.07 sample to the Co0.88Ni0.12Sb2.88Sn0.12 sample occurs during the measurement of electrical conductivity, indicating the adjustment of band structure by proper alloying. The results show that alloying enhances the power factor of the materials. On the basis of alloying, the thermoelectric properties of Co0.88Ni0.12Sb2.88Sn0.12 are improved by Ni-doping. The thermal conductivities of Ni-doping samples have no reduction, but their power factors have obvious enhancement. The power factor of Co0.81Ni0.19Sb2.88Sn0.12 reaches 3.0 mW·m-1·K-2 by Ni doping. The dimensionless thermoelectric figure of merit reaches 0.55 at 773 K for the unfilled Co0.81Ni0.19Sb2.88Sn0.12.

     

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