Thermoelectric properties of Yb0.15Co4Sb12 based nanocomposites with CoSb3 nano-inclusion

被引：36

作者：

Mi, J. L. ^{[1
]}

Zhao, X. B. ^{[1
]}

Zhu, T. J. ^{[1
]}

Tu, J. P. ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2008年 / 41卷 / 20期

关键词：

D O I：

10.1088/0022-3727/41/20/205403

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bulk skutterudite nanocomposites of Yb filled cobalt antimonide, Yb(0.15)Co(4)Sb(12), with different contents of CoSb(3) nano-inclusion were prepared by spark plasma sintering. The nanocrystals in the bulk composites are less than 100 nm. The Seebeck coefficient is enhanced by potential barrier scattering with the incorporation of a small number of CoSb(3) nanoparticles into the bulk materials, but is reduced with a further increase in the content of nanoparticles. Though the nano-inclusion is the unfilled CoSb(3), it is effective in reducing thermal conductivity. The figure of merit reaches a maximum of 0.9 for both the nanocomposites with 5% and 10% CoSb(3) nano-inclusions, an increase of about 10% compared with the Yb(0.15)Co(4)Sb(12) matrix. It still exhibits good thermoelectric performance after long-time annealing at 773 K for the nanocomposite due to the improved phase purity and almost unchanged nanostructure.

引用

页数：5

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