Effect of substitutions on the thermoelectric figure of merit of half-Heusler phases at 800 °C - art. no. 042106
Effect of substitutions on the thermoelectric figure of merit of half-Heusler phases at 800 °C - art. no. 042106
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DOI：
10.1063/1.2168019
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发表时间：
2006-01-23
影响因子：
4
通讯作者：
Blumm, J
中科院分区：
文献类型：
--
作者：
Culp, SR;Poon, SJ;Blumm, J
研究了热稳定的MNiSn （M=Ti, Zr, Hf）半heusler相作为n型热电材料用于高温发电的优点。结果表明，在Sn位点掺杂Sb可以增加性能值、ZT和ZT达到最大值时的温度。在M和Ni位点增加合金化对导热性和热电输运性能的好处也进行了研究。在温度接近800℃时，某些掺sb的MNiSn合金的热电优值ZT接近0.8，达到或超过了SiGe合金设定的行业基准。(c) 2006年美国物理研究所。
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.