Enhancing the thermoelectric properties of single and double filled p-type skutterudites synthesized by an up-scaled ball-milling process
Enhancing the thermoelectric properties of single and double filled p-type skutterudites synthesized by an up-scaled ball-milling process
复制标题
提高通过大规模球磨工艺合成的单填充和双填充 p 型方钴矿的热电性能
DOI：
10.1016/j.jallcom.2016.11.404
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发表时间：
2017
影响因子：
6.2
通讯作者：
Prado-Gonjal J
中科院分区：
文献类型：
--
作者：
Prado-Gonjal J
采用机械合金化方法制备了单填充和双填充p型方钴矿Ce0.8Fe3CoSb12和Ce0.5Yb0.5Fe3.25Co0.75Sb12。这提供了一种快速制备方钴矿的方法，可以扩大规模以在工业水平上采用。与传统的固相反应制备的材料相比，通过球磨制备的大尺寸样品表现出增强的优值ZT。在室温下，ZT增加约。19%的单填充和双填充方钴矿。Ce0.8Fe3CoSb12在773 K和Ce0.5Yb0.5Fe3.25Co0.75Sb12在823 K分别获得最大优值ZT = 0.68和ZT = 0.93。在室温下的热电值的改善可以追溯到由减小的晶粒尺寸引起的球磨样品中的热导率的降低。研究了微结构对热电性能的影响，以及在空气中的稳定性和经过几次加热和冷却循环后材料的性能，并在这项工作中进行了详细说明。通过球磨制备的致密化样品也显示出更高的抗氧化性，Ce0.8Fe3CoSb12的起始温度为694 K，Ce0.5Yb 0.5Fe3.25Co 0.75Sb12的起始温度为783 K。
The single and double filledp-type skutterudites Ce0.8Fe3CoSb12and Ce0.5Yb0.5Fe3.25Co0.75Sb12have been prepared by mechanical alloying. This offers a rapid method for the preparation of skutterudites that could be scaled up for adoption at industrial level. The large-scale samples prepared by ball-milling exhibit enhanced figures of merit ZT, compared with materials prepared by conventional solid-state reaction. At room temperature ZT is increased byca. 19% for both single and double filled skutterudites. Maximum figures of merit, ZT = 0.68 and ZT = 0.93 are attained for Ce0.8Fe3CoSb12at 773 K and Ce0.5Yb0.5Fe3.25Co0.75Sb12at 823 K respectively. The improvement in thermoelectric values at room temperature may be traced to a reduction in thermal conductivity in the ball-milled samples arising from the reduced grain size. The influence of the microstructure on the thermoelectric properties, together with the stability in air and the performance of the materials after several heating and cooling cycles has been studied and are detailed in this work. The densified samples prepared by ball-milling also show a higher resistance to oxidation, which starts at 694 K for Ce0.8Fe3CoSb12and at 783 K for Ce0.5Yb0.5Fe3.25Co0.75Sb12.
影响因子：
3.2
作者：
D. Thompson;Chang Liu;Nicole D. Ellison;J. Salvador;M. Meyer;B. HaddadDaad;Hsin Wang;W. Cai
通讯作者：
D. Thompson;Chang Liu;Nicole D. Ellison;J. Salvador;M. Meyer;B. HaddadDaad;Hsin Wang;W. Cai