Preparation and thermoelectric properties of high-performance Sb additional Yb0.2Co4Sb12+y bulk materials with nanostructure

被引：123

作者：

Li, Han ^{[1
]}

Tang, Xinfeng ^{[1
]}

Su, Xianli ^{[1
]}

Zhang, Qingjie ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 20期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2936277

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-performance Sb excess Yb(0.2)Co(4)Sb(12+y) (y=0,0.3,0.6,1.0) bulk materials with nanostructure have been prepared by combining melt spinning technique with spark plasma sintering. Average grain size of the bulk samples is about 150 nm when y=0 and 0.3, and the grain size increases with the increase of y. Moderately superfluous Sb may improve the electrical transport properties effectively and the thermal conductivity of the bulk samples decreases markedly due to the nanostructure. The thermoelectric performance of the samples is significantly improved, and the maximum figure of the merit reaches 1.26 for the Yb(0.2)Co(4)Sb(12.3) compound at 800 K. (C) 2008 American Institute of Physics.

引用

页数：3

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