The enhanced thermoelectric properties of Ba0.25Pb0.05Co4Sb11.5Te0.5 alloys prepared by HPHT at different pressure

被引：7

作者：

Deng, L. ^{[1
]}

Jia, X. P. ^{[1
,2
]}

Su, T. C. ^{[2
]}

Jiang, Y. P. ^{[1
]}

Zheng, S. Z. ^{[1
]}

Guo, X. ^{[1
]}

Ma, H. A. ^{[1
]}

机构：

[1] Jinlin Univ, Natl Lab Superhard Mat, Changchun 130012, Peoples R China

[2] Henan Polytech Univ, Inst Mat Sci & Engn, Jiaozuo 454000, Peoples R China

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 11期

基金：

美国国家科学基金会;

关键词：

Electrical properties; HPHT; Skutterudite; CoSb3; TEMPERATURE TRANSPORT-PROPERTIES; LATTICE THERMAL-CONDUCTIVITY; COSB3;

D O I：

10.1016/j.matlet.2011.02.062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Skutterudite Ba0.25Pb0.05Co4Sb11.5Te0.5 compounds with bcc crystal structure were prepared by high-pressure and high-temperature (HTHP) method. We have studied the structure and thermoelectric properties of Te-substituted partially filled Ba0.25Pb0.05Co4Sb11.5Te0.5 skutterudites which were synthesized at different pressure. The electrical resistivity. Seebeck coefficient and thermal conductivity of those samples were measured in the temperature range of 320-720 K. The combination of Ba and Pb fillers inside the voids of the skutterudite structure provided a broad range of resonant phonon scattering, so that a strong suppression in the lattice thermal conductivity was observed. A dimensionless thermoelectric figure of merit of 1.0 at 720 K was achieved for n-type Ba0.25Pb0.05Co4Sb11.5Te0.5 at last. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1582 / 1584

页数：3

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