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

doi:10.1063/1.2963476

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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60 Scopus citations

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 language	English (US)
Article number	042108
Journal	Applied Physics Letters
Volume	93
Issue number	4
DOIs	https://doi.org/10.1063/1.2963476
State	Published - 2008
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "The great improvement effect of pores on ZT in Co1-x Nix Sb3 system",

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.",

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

note = "Funding Information: This work was performed at Boston College, and supported by NSFC under grant No. 50771046 and Guangdong Provincial Key Project (No. 2006A11003005).",

year = "2008",

doi = "10.1063/1.2963476",

language = "English (US)",

volume = "93",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - The great improvement effect of pores on ZT in Co1-x Nix Sb3 system

AU - He, Qinyu

AU - Hu, Shejun

AU - Tang, Xingui

AU - Lan, Yucheng

AU - Yang, Jian

AU - Wang, Xiaowei

AU - Ren, Zhifeng

AU - Hao, Qing

AU - Chen, Gang

N1 - Funding Information: This work was performed at Boston College, and supported by NSFC under grant No. 50771046 and Guangdong Provincial Key Project (No. 2006A11003005).

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

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M1 - 042108

ER -

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

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