Effect of Ce filling fraction on thermoelectric transport properties of p-type CeyFe1.5Co2.5Sb12

被引：15
|
作者：
Tang, XF [1 ]
Chen, LD
Takashi, G
Toshio, H
Yuan, RZ
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Compositizat, Wuhan 430070, Peoples R China
来源：
ACTA PHYSICA SINICA | 2000年 / 49卷 / 12期
关键词：
filling fraction; carrier concentration; electrical conductivity; seebeck coefficient; lattice thermal conductivity;
D O I：
10.7498/aps.49.2460
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Effect of Ce filling fraction on the thermoelectric transport properties of p-type Co-rich filled skutteudite compounds: CeyFe1.5Co2.5Sb12(y = 0-0.46) were investigated. CeyFe1.5Co2.5Sb12 showed p-type conduction. Hall coefficient R-H in creased with increasing Ce filling fraction. Hole concentration p and electrical conductivity sigma decreased with increasing Ce filling fraction. Seebeck coefficient alpha increased with increasing Ce filling fraction, when Ce filling fraction was about 0.3, the lattice thermal conductivity kappa (l) reached the minimum value. It indicated that the effect of Ge rattling on phonon scattering was the strongest as Sb-dodecahedron partial voids were filled by Ce. A maximum ZT value of 1.1 was obtained for Co-rich Ce0.28Fe1.52Co2.48Sb12 at 750 K.
引用
收藏
页码：2460 / 2465
页数：6
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