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Effect of grain size on thermoelectric properties of CoSb3 compound

Yu Bo-Lin Qi Qiong Tang Xin-Feng Zhang Qing-Jie

Effect of grain size on thermoelectric properties of CoSb3 compound

Yu Bo-Lin, Qi Qiong, Tang Xin-Feng, Zhang Qing-Jie
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  • Abstract views:  3454
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  • Received Date:  08 September 2004
  • Accepted Date:  11 July 2005
  • Published Online:  20 December 2005

Effect of grain size on thermoelectric properties of CoSb3 compound

  • 1. 武汉理工大学材料复合新技术国家重点实验室,武汉 430070

Abstract: The effects of grain size on thermoelectric properties of CoSb3 compound was investigated systematically. The results indicate that the lattice thermal conductivity κp of CoSb3 compound decreases significantly, the Seebeck coefficient α increases remarkably, and the band gap Eg increases and electrical conductivity σ decreases, when the grain size decrease from μm-scale to nano-scale. The dimensionless thermoelectric figure of merit ZT of CoSb3 compound with grain size of 200nm reaches 0.43 at 700K, about 4 times that of sample with grain size of 5000nm.

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