Control of thermoelectric properties in ZrO2/CoSb3 nano-dispersed composites

被引：8
作者：
Stiewe, C.
He, Z.
Platzek, D.
Karpinski, G.
Mueller, E. [1 ]
Li, S.
Toprak, M.
Muhammed, M.
机构：
[1] DLR, Inst Mat Res, D-51170 Cologne, Germany
[2] Royal Inst Technol, Mat Chem Div, Stockholm, Sweden
来源：
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2007年 / 38卷 / 09期
关键词：
nanocomposites; thermoelectric properties; ZrO2; CoSb3;
D O I：
10.1002/mawe.200700192
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nano-dispersed ZrO2/CoSb3 composites of various composition were prepared by uniaxial hot pressing of nano-sized powders of thermoelectric CoSb3 intermixed with ceramic nano-powders. The phase purity, the niicrostructure, and the temperature dependent transport parameters of the composites were investigated. Non-dispersed samples from nano-sized CoSb3 powders show higher electrical conductivity compared to melt-grown material which is attributed to the presence of a small excess of metallic Sb, but they exhibit lower thermal conductivity due to the fine-grained structure. Addition of 5 at.-% ZrO2 enhances the ratio of electrical to thermal conductivity, whereas hardly affects the See-beck coefficient. In this manner the nano-dispersion method provides an effective approach to improving the materials thermoelectric performance.
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收藏
页码：773 / 776
页数：4
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