Thermoelectric properties of FeVSb half-Heusler compounds by levitation melting and spark plasma sintering
Thermoelectric properties of FeVSb half-Heusler compounds by levitation melting and spark plasma sintering
复制标题
悬浮熔炼和放电等离子烧结 FeVSb 半赫斯勒化合物的热电性能
DOI：
10.1016/j.intermet.2012.07.037
复制
发表时间：
2013-01-01
期刊：
影响因子：
4.4
通讯作者：
Zhao, X. B.
中科院分区：
文献类型：
--
作者：
Fu, Chenguang;Xie, Hanhui;Zhao, X. B.
采用悬浮熔炼-放电等离子烧结-退火工艺成功地合成了半Heusler化合物FeVSb。研究了FeVSb在制备过程中的相变，得到了纯净的FeVSb半Heusler相。研究了不同相对密度的纯FeVSb的热电性能，发现300K时FeVSb的热导率与气孔率的关系符合Maxwell-Eucken方程。在350K时，获得了最大功率因数48×10~(-4)Wm(-1)K~(-2)，最大相对密度为97%。在550K时，纯FeVSb的ZT值接近于0.25，这是报道的FeVSb半Heusler化合物的最高ZT值之一。皇冠版权所有(C)2012由爱思唯尔有限公司出版。保留所有权利。
Half-Heusler compound FeVSb has been successfully synthesized by levitation melting followed by spark plasma sintering and annealing process. The phase transformation of FeVSb in the fabricating process has been studied, and pure FeVSb half-Heusler phase was obtained. Thermoelectric properties of pure FeVSb with different relative densities have been investigated, and the porosity dependence of thermal conductivity of FeVSb at 300 K follows Maxwell-Eucken equation well. A maximum power factor of 48 x 10(-4) W m(-1) K-2 was obtained at 350 K from the sample with the highest relative density of 97%. A state-of-the-art ZT value of similar to 0.25 has been attained at 550 K for pure FeVSb, which is one of the highest reported ZT value for FeVSb half-Heusler compound. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.