Synthesis of filled skutterudite compounds: Ba_yFe_xCo_4−xSb_12
Synthesis of filled skutterudite compounds: Ba_yFe_xCo_4−xSb_12
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DOI：
10.1557/jmr.2000.0325
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发表时间：
2000-11
影响因子：
2.7
通讯作者：
Lidong Chen;X. Tang;T. Goto;T. Hirai
中科院分区：
文献类型：
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作者：
Lidong Chen;X. Tang;T. Goto;T. Hirai
Ba-filled skutterudite compounds, Ba_ y Fe_ x Co_4− x Sb_12, were synthesized by a two-step solid reaction method. A binary compound of Sb_3Ba and a ternary compound of Fe_ x Co_1− x Sb_2 were first synthesized at 900 and 973 K, respectively. The presynthesized Sb_3Ba and Fe_ x Co_1− x Sb_2 were then mixed with Sb and heated at 973 K in an Ar atmosphere. The resulting powder was of single phase with a composition of Ba_ y Fe_ x Co_4− x Sb_12, having skutterudite structure with the Sb–dodecahedron voids fractionally filled by Ba. The lattice constant of Ba_ y Fe_ x Co_4− x Sb_12 increased with Ba and Fe content. The maximum filling fraction of Ba ( y _max) in Ba_ y Fe_ x Co_4− x Sb_12 was found to be greater than that of Ce or La in Ln_ y Fe_ x Co_4− x Sb_12, especially in the lower Fe content region. The y _max varied from 0.35 to near 1.0 when Fe content ( x ) changed from 0 to 4.
