Effects of Y filling fraction on thermoelectric properties of YyFexCo4-xSb12

Xinfeng Tang, Lidong Chen, Shinji Oribe, Wei Pan, Takashi Goto, Toshio Hirai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Filled skutterudite compounds, YyFexCo4-xSb12 (x = 0 to approximately 1.0, y = 0 to approximately 0.4), were synthesized by solid state reaction and melting methods using Co, Fe, Sb, YCl3·nH2O powders and Y ingot as source materials. The Rietveld analysis suggests that Y3+ ions were filled in the Sb-icosahedron voids of skutterudite structure. The rattling effect of Y3+ ions filling in the voids were stronger than that of Ce3+ or La3+ ions. The lattice thermal conductivity decreased with increasing Y filling fraction, and reached the minimum values at y = 0.3. With increasing Y filling fraction, the electrical conductivity decreased and the Seebeck coefficient increased. The maximum ZT value of 0.7 at 750 K was obtained for Y0.08Fe0.8Co3.2Sb12.

Original languageEnglish
Pages (from-to)958-962
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume47
Issue number9
DOIs
Publication statusPublished - 2000 Sep

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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