Synthesis and thermoelectric properties of p-type barium-filled skutterudite BayFexCo4-xSb12

X. F. Tang, L. D. Chen, T. Goto, T. Hirai, R. Z. Yuan

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Single-phase barium-filled skutterudite compounds, BayFexCo4-xSb12 (x = 0 to 3.0, y = 0 to 0.7), were synthesized by a two-step solid-state reaction method. 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 CeyFexCo4-xSb12. The ymax varied from 0.35 to near 1.0 when Fe content changed from 0 to 4.0. BayFexCo4-xSb12 showed p-type conduction at a composition range of x = 0 to 3.0, y = 0 to 0.7. Carrier concentration and electrical conductivity increased with increasing Fe content and decreased with increasing Ba filling fraction. The Seebeck coefficient increased with increasing Ba filling fraction and with decreasing Fe content. Lattice thermal conductivity decreased with increasing Ba filling fraction and reached a minimum at a certain Ba filling fractions (y = 0.3 to 0.4). The greatest ZT value of 0.9 was obtained at 750 K for p-type Ba0.27Fe0.98Co3.02Sb12. It is expected that further investigation on the optimization of filling fraction would result in a higher ZT value at the moderately low Fe content region.

本文言語English
ページ(範囲)2953-2959
ページ数7
ジャーナルJournal of Materials Research
17
11
DOI
出版ステータスPublished - 2002 11

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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