Gadolinium filled CoSb3: High pressure synthesis and thermoelectric properties
Gadolinium filled CoSb3: High pressure synthesis and thermoelectric properties
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DOI：
10.1016/j.matlet.2013.02.034
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发表时间：
2013-05
影响因子：
3
通讯作者：
Jianqing Yang;Bo Xu;Long Zhang;Yadi Liu;D. Yu;Zhongyuan Liu;Julong He;Yongjun Tian
中科院分区：
文献类型：
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作者：
Jianqing Yang;Bo Xu;Long Zhang;Yadi Liu;D. Yu;Zhongyuan Liu;Julong He;Yongjun Tian
采用高压合成法在几个小时内成功地合成了钆填充的CoSb 3，这是传统固相反应在常压下无法实现的。合成的GdyCo_4Sb_（12）样品具有方钴矿结构的Im 3 <$对称性。热电性能的研究表明，钆填充后的功率因数的提高和晶格热导率的下降。Gd_（0.12）Co_（4Sb）_（12）样品在600 K时的ZT最高，为0.52。高压合成能有效拓宽可填充CoSb 3空隙的元素种类，缩短反应时间，为热电材料的制备提供了一条新的途径。
Gadolinium filled CoSb3, which is inaccessible at ambient pressure with the traditional solid state reaction, was successfully synthesized by using a high pressure synthesis method within several hours. The synthetic GdyCo4Sb12samples possess Im3¯ symmetry of skutterudite structure. The thermoelectric properties investigation revealed the enhancement of the power factor and decrease of lattice thermal conductivity after Gadolinium filling. The highest ZT of 0.52 was achieved for Gd0.12Co4Sb12sample at 600K. High pressure synthesis can effectively broaden elemental species fillable to CoSb3voids and substantially shorten the reaction duration, thus provide us an alternative pathway for thermoelectric materials fabrication.