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首页> 外文期刊>Science and Technology of Advanced Materials >Enhancement of high temperature thermoelectric properties of intermetallic compounds based on a Skutterudite IrSb_3 and a half-Heusler TiNiSb
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Enhancement of high temperature thermoelectric properties of intermetallic compounds based on a Skutterudite IrSb_3 and a half-Heusler TiNiSb

机译：基于Skutterudite IrSb_3和半Heusler TiNiSb的金属间化合物的高温热电性能的增强

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摘要

Phonon glass and electron crystal (PGEC) thermoelectric materials have been expected to be a new class of thermoelectric materials for high temperature applications. Among the efforts to optimize the high temperature thermoelectric properties of various PGEC thermoelectric materials, recent experimental works on the Skutterudite IrSb_3 and half-Heusler TiNiSb intermetallic compounds are presented herein by which the material design concept for high energy conversion efficiency, i.e. a high figure of merit, is suggested. It is revealed that the thermoelectric efficiency of IrSb_3 can be increased by the decrease of lattice thermal conductivity due to the rattling effect of La atoms filled in the structural vacancies of the Skutterudite crystal structure. In the half-Heusler TiNiSn, high temperature thermoelectric properties are improved by Hf substitution to the Ti sites by reducing lattice thermal conductivity and also by Sb doping to increase power factor. It is concluded that the proper alloy designing for controlling crystal structure and carrier concentration could enable these intermetallic compounds to exhibit a high potential for elevated temperature thermoelectric applications.
机译：声子玻璃和电子晶体（PGEC）热电材料有望成为高温应用中的新型热电材料。在优化各种PGEC热电材料的高温热电性能的努力中，本文介绍了Skutterudite IrSb_3和Half-Heusler TiNiSb金属间化合物的最新实验工作，通过这些工作，材料设计概念实现了高能量转换效率，即高能量转化率。优点，建议。揭示了由于填充在方钴矿晶体结构的结构空位中的La原子的嘎嘎声效应，可以通过降低晶格热导率来提高IrSb_3的热电效率。在半霍斯勒TiNiSn中，通过降低晶格热导率的Hf替代Ti位置，以及通过Sb掺杂以增加功率因数来改善高温热电性能。结论是，适当的合金设计用于控制晶体结构和载流子浓度可以使这些金属间化合物在高温热电应用中表现出很高的潜力。

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