High temperature thermoelectric properties of double-filled InxYbyCo4Sb12 skutterudites

被引：46

作者：

Peng, Jiangying ^{[1
,2
]}

He, Jian ^{[1
]}

Su, Zhe ^{[1
]}

Alboni, Paola N. ^{[1
]}

Zhu, Song ^{[1
]}

Tritt, Terry M. ^{[1
]}

机构：

[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

[2] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, Wuhan 430074, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 08期

关键词：

annealing; antimony alloys; cobalt alloys; electrical conductivity; Hall effect; indium alloys; melting; power factor; scanning electron microscopy; Seebeck effect; sintering; thermal conductivity; voids (solid); X-ray diffraction; ytterbium alloys; HIGH FIGURE; MERIT;

D O I：

10.1063/1.3116151

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Void filling in the CoSb3 skutterudite lattice with different kinds of heavy elements has proved effective in enhancing their thermoelectric performance. In this paper we report the effects of (In,Yb) double filling on the high temperature thermoelectric properties of CoSb3. The InxYbyCo4Sb12 (0 <(x,y)< 0.2) samples have been prepared via a melting-annealing-sintering procedure and characterized by means of x-ray powder diffraction, scanning electron microscopy, Hall coefficient, electrical and thermal conductivities, and Seebeck coefficient measurements. As compared to the In and Yb single-filling approach, the (In,Yb) double-filling approach can effectively reduce the lattice thermal conductivity without degrading the power factor. As a result, several compositions achieve ZT values around unity, while a maximum ZT value of 1.1 is obtained in In0.2Yb0.1Co4Sb12 at 700 K. The difference in the effects of In and Yb filling on the thermoelectric properties is discussed.

引用

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