Solid state reaction synthesis of filled skutterudite compounds (Ce or Y)yFexCo4-xSb12 and the effect of filling atoms Ce or Y on lattice thermal conductivity

Xinfeng Tang, Lidong Chen, Goto Takashi, Hirai Toshio, Runzhang Yuan

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18 Citations (Scopus)

Abstract

The synthesis of filled skutterudite compounds (Ce or Y)yFexCo4-xSb12, through a solid state reaction using chloride of Ce or Y, high purity powder of Co, Fe, and Sb as starting materials, was investigated. (Ce or Y)yFexCo4-xSb12 (x = 0-1.0, y = 0-0.15) compounds were obtained at 850-1123 K. The results of Rietveld analysis demonstrate that (Ce or Y)yFexCo4-xSb12 synthesized by a solid state reaction possesses a filled skutterudite structure. The filling fraction of Ce or Y obtained by Rietveld analysis agrees well with the composition obtained by chemical analysis. The lattice constant of CeyFexCo4-xSb12 increases with increasing substitution of Fe at Co sites, and with an increasing Ce filling fraction in the Sb-dodecahedron voids. The lattice thermal conductivity of (Ce or Y)yFexCo4-xSb12 decreases significantly with an increasing Ce or Y filling fraction in the voids and with substitution of Fe at Co sites.

Original languageEnglish
Pages (from-to)306-312
Number of pages7
JournalScience in China, Series B: Chemistry
Volume43
Issue number3
DOIs
Publication statusPublished - 2000 Jun

ASJC Scopus subject areas

  • Chemistry(all)

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