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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effects of partial substitution of Co by Ni on the high-temperature thermoelectric properties of TiCoSb-based half-Heusler compounds
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Effects of partial substitution of Co by Ni on the high-temperature thermoelectric properties of TiCoSb-based half-Heusler compounds

机译:Ni部分取代Co对TiCoSb基半霍斯勒化合物的高温热电性能的影响

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摘要

TiCoSb-based half-Heusler compounds were prepared by solid-state reaction and their thermoelectric properties were studied. The un-doped TiCoSb compound shows n-type conduction and demonstrates high Seebeck coefficient at high temperatures. The partial substitution of Co by Ni caused great increase in electron concentration and electrical conductivity, while the Seebeck coefficient and the thermal conductivity showed little change when Ni content (x) is below 5 percent. A maximum power factor of 16 mu W/K~2 cm and a maximum dimensionless figure of merit (ZT) of 0.27 have been obtained for the composition of TiCo_(0.95)Ni_(0.05)Sb at 900 K.
机译:通过固相反应制备了基于TiCoSb的半霍斯勒化合物,并研究了其热电性能。未掺杂的TiCoSb化合物显示n型导电性,并在高温下表现出高塞贝克系数。当Ni含量(x)低于5%时,Ni部分取代Co引起电子浓度和电导率的大幅提高,而塞贝克系数和热导率变化不大。对于900 K下TiCo_(0.95)Ni_(0.05)Sb的组成,最大功率因数为16μW / K〜2 cm,最大无因次品质因数(ZT)为0.27。

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