The great improvement effect of pores on ZT in Co1-x Nix Sb3 system

Qinyu He, Shejun Hu, Xingui Tang, Yucheng Lan, Jian Yang, Xiaowei Wang, Zhifeng Ren, Qing Hao, Gang Chen

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Abstract

In this paper, the Co1-x Nix Sb3+y system (x=0.1,0.2; y=0, 0.05) has been prepared by direct current induced hot press and annealing. Pores were made by annealing pressed Co1-x Nix Sb3.05 pellets into Co1-x Nix Sb3 pellets during annealing. It was found that from room temperature to 500 °C, the pores with diameter larger than 1 μm has significantly increased the Seebeck coefficient, considerably decreased the thermal conductivity, almost maintained the electrical conductivity constant, and therefore markedly improved the dimensionless figure of merit (ZT) of Co1-x Nix Sb3 system. By comparing the samples, we conclude that inducing pores into skutterudites is an effective route to greatly improve the ZT.

Original languageEnglish (US)
Article number042108
JournalApplied Physics Letters
Volume93
Issue number4
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    He, Q., Hu, S., Tang, X., Lan, Y., Yang, J., Wang, X., Ren, Z., Hao, Q., & Chen, G. (2008). The great improvement effect of pores on ZT in Co1-x Nix Sb3 system. Applied Physics Letters, 93(4), [042108]. https://doi.org/10.1063/1.2963476