Nanostructures and enhanced thermoelectric properties in Ce-filled skutterudite bulk materials

被引：50

作者：

Zhai, P. C. ^{[1
]}

Zhao, W. Y.

Li, Y.

Liu, L. S.

Tang, X. F.

Zhang, Q. J.

Niino, M.

机构：

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

[2] Japan Aerosp Explorat Agcy, Kakuda, Miyagi 9811525, Japan

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 05期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2234842

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The nanostructures induced by uniaxial compression in Ce0.29Fe1.40Co2.60Sb11.24 bulk thermoelectric material is reported. High-resolution transmission electron microscope images reveal that the nanostructures consist of Ce0.31Fe1.38Co2.62Sb11.56 crystals and Fe0.34Co0.66Sb1.99 minicrystal/noncrystal with grain sizes about 5-20 nm. It is shown that the Seebeck coefficient is increased by 21%, the phonon thermal conductivity is reduced by 19%, while the electrical conductivity rises slightly at 300 K. This leads to a surprising increase in the power factor by 51%. The significant increase of Seebeck coefficient and the remarkable reduction of phonon thermal conductivity are believed to be due to quantum effect and size effect of the nanostructures, respectively. (c) 2006 American Institute of Physics.

引用

页数：3

共 27 条

[1] Nanostructured Co1-xNixSb3 skutterudites:: Synthesis, thermoelectric properties, and theoretical modeling [J].