Effect of Ba filling fraction on thermoelectric properties of p-type BayFe1.6Co2.4Sb12

Tang Xin-feng, Chen Li-dong, Zhang Lian-meng, Takashi Goto, Toshio Hirai, Yuan Run-zhang

Research output: Contribution to journalArticle

Abstract

Effects of Ba filling fraction on the thermoelectric properties of p-type filled skutterudite compounds BayFe1.6Co2.4Sb12(y = 0 - 0.63) were investigated. BayFe1.6Co2.4Sb12 showed p-type conduction. The hall coefficient (RH) and seebeck coefficient (α) increased with increasing Ba filling fraction. But hole concentration (p) and electrical conductivity (σ) decreased. While Ba filling fraction was about 0.4, the lattice thermal conductivity (κL) reached the minimum value. The results show that effect of Ba rattling on phonon scattering is the strongest as Sb-icosahedron partial voids are filled by Ba. A maximum dimensionless thermoelectric figure of merit (ZT) value of 0.7 was obtained for Ba0.38Fe1.6Co2.4Sb12 at 750K.

Original languageEnglish
Pages (from-to)8-12
Number of pages5
JournalJournal Wuhan University of Technology, Materials Science Edition
Volume17
Issue number3
DOIs
Publication statusPublished - 2002 Sep

Keywords

  • Filled skutterudite compound
  • Filling fraction
  • Thermoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)

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