Effects of filling atoms Ba, Ce, Y and substituting atoms Fe, Ni on lattice thermal conductivity of RyMxCo4 - XSb 12

X. F. Tang, L. D. Chen, J. Wang, Q. J. Zhang, Takashi Goto, T. Hirai

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Effects of filling atoms with different ionic radiuses Ba, Ce, Y and different substituting atoms Fe, Ni on the lattice thermal conductivity of filled RyMxCo4 - xSb12 are systematically studied. The results show that the lattice thermal conductivity decreases significantly by filling Ba, Ce, Y atoms in Sb-icosahedron voids, and the reducing range of the lattice thermal conductivity increases with the ionic radii of Ba2+, Ce3+ and Y3+ decreasing. The lowest lattice thermal conductivity and strongest rattling actions of filling atoms on scattering of phonons are obtained when the Sb-icosahedron voids are partly filled. The lattice thermal conductivity of RyM xCo4 - xSb12 decreases greatly by substituting Co with Fe or Ni, and the substituting atoms Ni are more effective than Fe in reducing lattice thermal conductivity.

Original languageEnglish
Pages (from-to)259-264
Number of pages6
JournalJournal of Alloys and Compounds
Volume394
Issue number1-2
DOIs
Publication statusPublished - 2005 May 17

Keywords

  • Filled skutterudites
  • Filling fraction
  • Lattice thermal conductivity
  • Substituting content

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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