Nanostructuring and improved performance of ternary Bi-Sb-Te thermoelectric materials

被引:58
作者
Cao, Y. Q. [1 ]
Zhu, T. J. [1 ]
Zhao, X. B. [1 ]
Zhang, X. B. [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
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2008年 / 92卷 / 02期
关键词
D O I
10.1007/s00339-008-4518-y
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A ternary (Bi,Sb)(2)Te-3 bulk nanostructured thermoelectric compound has been prepared by a combination of hydrothermal synthesis and hot pressing. It was found that the grain sizes of the hot-pressed bulk sample vary from tens to hundreds of nanometers, which would be favorable to enhance the scattering of both carriers and phonons, resulting in a high Seebeck coefficient with a satisfactory electrical conductivity and a very low thermal conductivity. The highest figure of merit ZT of the nanostructured (Bi,Sb)(2)Te-3 bulk sample reaches 1.28 at 303 K, which is not only remarkably higher than the zone-melted one, but also higher than commercial state-of-the-art Bi2Te3-based materials.
引用
收藏
页码:321 / 324
页数:4
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