Effect of substitutions on the thermoelectric figure of merit of half-Heusler phases at 800 °C -: art. no. 042106

被引:223
作者
Culp, SR
Poon, SJ [1 ]
Hickman, N
Tritt, TM
Blumm, J
机构
[1] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA
[2] Clemson Univ, Complex & Adv Mat Lab, Clemson, SC 29634 USA
[3] NETZSCH Geratebau GmbH, D-95088 Selb Bavaria, Germany
关键词
D O I
10.1063/1.2168019
中图分类号
O59 [应用物理学];
学科分类号
摘要
The merit of thermally stable MNiSn (M=Ti, Zr, Hf) half-Heusler phases, as n-type thermoelectric materials, for high-temperature power generation has been examined. Sb doping at the Sn site is shown to increase both the figure of merit, ZT, and the temperature at which ZT is maximized. The benefits of increased alloying at the M and Ni sites, on the thermal conductivity and thermoelectric transport properties, have also been investigated. The thermoelectric figure of merit, ZT similar to 0.8 at T similar to 800 degrees C, for select Sb-doped MNiSn alloys was found to meet or exceed the industry benchmark set by SiGe alloys. (c) 2006 American Institute of Physics.
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页码:1 / 3
页数:3
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