High-temperature thermoelectric properties of Tix(ZrHf)0.99-xV0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloys

被引：11

作者：

Lee, Ping-Jen ^{[1
,2
]}

Tseng, Shih Chun ^{[2
]}

Chao, Long-Sun ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Engn Sci, Tainan 701, Taiwan

[2] Ind Technol Res Inst, Nano Technol Res Ctr, Hsinchu 301, Taiwan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 496卷 / 1-2期

关键词：

Half-Heusler; Thermoelectric; Seebeck coefficient; SUBSTITUTION; ZRNISN;

D O I：

10.1016/j.jallcom.2010.02.131

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of Ti substitution at the Zr and Hf site on thermoelectric properties of Ti-x(ZrHf)(0.99-x)V0.01Ni0.9Pd0.1Sn0.99Sb0.01 half-Heusler alloy compounds was investigated by finding the electrical resistivity, Hall effect, Seebeck coefficient, thermal conductivity and using X-ray diffraction. It was shown that substitution of Ti for Zr and Hf leads to a major reduction in the thermal conductivity and an enhancement of the Seebeck coefficient. The observed maximum Seebeck coefficient, minimum electrical resistivity, and minimum thermal conductivity at about 820 K are 206 mu V K-1, 0.71 m Omega cm, and 5.13 W m(-1) K-1, respectively. In addition, the dimensionless figure of merit is about 0.92 at about 820 K with a Ti content at x=0.3. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：620 / 623

页数：4

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