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

页码：321 / 324

页数：4

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