Cerium filling and lattice thermal conductivity of skutterudites
Cerium filling and lattice thermal conductivity of skutterudites
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方钴矿的铈填充和晶格热导率
DOI：
10.1109/ict.1998.740379
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Jihui Yang
中科院分区：
文献类型：
--
作者：
C. Uher;Siqing Hu;Jihui Yang
我们研究了Ce/suby/Fe/sub4-x/Co/subx/Sb/sub12/的填充Skutterudite的结构和输运性质。结果表明，Ce的占有率与Co的存在密切相关，从x=0时几乎100%的填充量到纯Ce/suby/Co/sub4/Sb/sub12/的填充量不超过10%，即x=4时，Ce的“摇摆运动”和Fe与Co的合金化对晶格导热系数有很强的抑制作用。我们认为，部分填充的Skutterudite可以看作是完全填充的CeFe/sub4/Sb/sub12/和/Spl Square/Co/sub4/Sb/sub12/的固溶体，其中/SPL Square/代表空缺。
We have investigated the structural and transport properties of filled skutterudites of the general form Ce/sub y/Fe/sub 4-x/Co/sub x/Sb/sub 12/. We show that the Ce occupancy of the cages is a strong function of the presence of cobalt, varying from an almost 100% filling for x=0 down to no more than 10% filling in pure Ce/sub y/Co/sub 4/Sb/sub 12/, i.e., for x=4. We demonstrate a strong suppression of the lattice thermal conductivity by both the "rattling motion" of Ce, and by alloying Fe with Co. We propose that the partially filled skutterudites can be viewed as solid solutions of fully filled CeFe/sub 4/Sb/sub 12/ and /spl square/Co/sub 4/Sb/sub 12/, where /spl square/ stands for a vacancy.