Synthesis and thermoelectric properties of filled skutterudite compounds CeyFexCo4-xSb12 by solid state reaction

被引：34

作者：

Tang, XF

Chen, LD

Goto, T

Hirai, T

Yuan, RZ

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

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

来源：

JOURNAL OF MATERIALS SCIENCE | 2001年 / 36卷 / 22期

关键词：

D O I：

10.1023/A:1012473428845

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Filled skutterudite compounds, CeyFexCo4-xSb12(x = 0-1.0, y = 0-0.15), were synthesized by solid state reaction using Co, Fe, Sb and CeCl3 . nH(2)O powders as source materials. The lattice constants of CeyFexCo4-xSb(12) increased with increasing substitution of Fe at Co sites and with increasing Ce filling fraction in the Sb-icosahedron voids. All specimens showed p-type conduction. Carrier concentration (p) and electrical conductivity (sigma) increased with increasing substitution of Fe at Co sites and decreased with increasing Ce filling fraction. The Seebeck coefficient (alpha) decreased with increasing Fe content and increased with increasing Ce filling fraction. Thermal conductivity (kappa) decreased with increasing substitution of Fe at Co sites and with increasing Ce filling fraction. A maximum ZT value of 0.8 was obtained for Ce0.12Fe0.71Co3.29Sb12 at 750 K. (C) 2001 Kluwer Academic Publishers.

引用

页码：5435 / 5439

页数：5

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