The synthesis of filled skutterudite compounds （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub>, through a solidstate reaction using chlor...The synthesis of filled skutterudite compounds （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub>, through a solidstate reaction using chloride of Ce or Y,high purity powder of Co, Fe, and Sb as starting materials,was investigated. （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> （x=0--1.0, y=0--0.15） compounds were obtained at850--1 123 K. The results of Rietveld analysis demonstrate that （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>1</sub>2synthesized by a solid state reaction possesses a filled skutterudite structure. The filling fraction ofCe or Y obtained by Rietveld analysis agrees well with the composition obtained by chemicalanalysis. The lattice constant of （Ce）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> increases with increasing substitution of Fe at Cosites, and with an increasing Ce filling fraction in the Sb-dodecahedron voids. The lattice thermalconductivity of （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> decreases significantly with an increasing Ce or Y fillingfraction in the voids and with substitution of Fe at Co sites.展开更多
文摘The synthesis of filled skutterudite compounds （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub>, through a solidstate reaction using chloride of Ce or Y,high purity powder of Co, Fe, and Sb as starting materials,was investigated. （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> （x=0--1.0, y=0--0.15） compounds were obtained at850--1 123 K. The results of Rietveld analysis demonstrate that （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>1</sub>2synthesized by a solid state reaction possesses a filled skutterudite structure. The filling fraction ofCe or Y obtained by Rietveld analysis agrees well with the composition obtained by chemicalanalysis. The lattice constant of （Ce）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> increases with increasing substitution of Fe at Cosites, and with an increasing Ce filling fraction in the Sb-dodecahedron voids. The lattice thermalconductivity of （Ce or Y）<sub>y</sub>（Fe）<sub>x</sub>（Co）<sub>4x</sub>（Sb）<sub>12</sub> decreases significantly with an increasing Ce or Y fillingfraction in the voids and with substitution of Fe at Co sites.
