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Thermoelectric performance of skutterudite NixCo4−xSb12 rapidly synthesized by microwave heating

  • Ying Lei
  • Leiqiang Ma
  • Rui Zheng
  • Yu LiEmail author
  • Rundong WanEmail author
  • Wen ChenEmail author
  • Hongwei Zhou
  • Wensheng Gao
Article

Abstract

In the present work, a series of single phase Ni-doped skutterudite compounds NixCo4−xSb12 (x = 0.1, 0.2, 0.3, 0.4, 0.5) were successful synthesized by 5 min microwave heating for the first time. The resulting ingots was pulverized and sintered by spark plasma sintering to fabricate bulk samples, and their microstructure and thermoelectric properties have been investigated systematically. The results show that the matrix grain characteristics are influenced by Ni concentration and microwave irradiation. The Ni0.3Co3.7Sb12 bulk has the smallest and uniform grain size of about 1–2 µm. The maximum power factors of NixCo4−xSb12 are 2273, 2479, 2711, 2613 and 2526 µWm−1K−2 respectively. A highest ZT of 0.52 for Ni0.3Co3.7Sb12 is achieved at 773 K along with a total thermal conductivity of 3.8 Wm−1K−1.

Notes

Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant No. 51574134, No. 51574042), Joint fund between Shenyang National Laboratory for Materials Science and State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals (Grant No. 18LHPY016) and Anhui university outstanding young talent support program (key project) (Grant No. gxyqZD2017039).

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interest regarding the publication of this paper.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Metallurgical EngineeringAnhui University of TechnologyMa’anshanChina
  2. 2.College of Materials Science and EngineeringKunming University of Science and TechnologyKunmingChina
  3. 3.Institute of Mineral Resources Development and UtilizationChangsha Research Institute of Mining and Metallurgy CO., LTDChangshaChina
  4. 4.State Key Laboratory of Advanced Processing and Recycling of Nonferrous MetalsLanzhou University of TechnologyLanzhouChina

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