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以Ba为填充原子，在x=0—3.0，y=0—0.7的组成范围内，用多步固相反应法合成了单相BayFexCo4-xSb12化合物.用Rietveld方法对结构的精确化结果表明：合成的BayFexCo4-xSb12化合物具有填充式skutterudite结构，Ba的热振动参数(B)比Sb,Fe/Co的大，表明在Bay
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关键词:
- 填充式skutterudite化合物 /
- 固相反应
BayFexCo4-xSb12(x=0—3.0，y=0—0.7) were synthesized by a two-step solid state reaction method. The results of Rietveld refinement demonstrated that BayFexCo4-xSb12 synthesized possesses a filled skutterudite structure. The filling fraction of Ba obtained by Rietveld refinement agreed well with the composition obtained by inductively coupled plasma emission spectroscopy. Thermal parameters (B) of Ba was larger than that of Sb, and Fe/Co, indicating that Ba “rattles”in Sb-icosahedron voids. The lattice constants of BayFexCo4-xSb12 increased with increasing Ba filling fraction and Fe content. The maximum filling fraction of Ba (ymax) in BayFexCo4-xSb12 increased with increasing Fe content, and was found to be rather greater than that of Ce of La in LnyFexCo4-xSb12. The ymax varied from 0.35 to near 1.0 when Fe content (x) changed from 0 to 4.0.-
Keywords:
- filled skutterudite compound /
- solid state reaction
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