Melt spinning synthesis of p-type skutterudites: Drastically speed up the process of high performance thermoelectrics

Lijie Guo, Guiwen Wang, Kunling Peng, Yanci Yan, Xiaodan Tang, Min Zeng, Jiyan Dai, Guoyu Wang, Xiaoyuan Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

In this study, via a home-made induction melting process combined with spark plasma sintering technique, we successfully synthesize the nanostructured skutterudites NdxYbyFe3CoSb12(x + y = 1.0, x = 0.3, 0.4, 0.5, 0.6, 0.7) in less than 3 h, which is significantly faster than that of the solid state reaction (168 h) and the traditional melt spinning method (40 h). Systematical microstructures analysis of the sintered bulk materials reveals the largely refined matrix grains (100-300 nm) and ubiquitous YbSb precipitates (~ 30 nm), resulting in a very low lattice thermal conductivity. A peak ZT up to 1.02 at 760 K is obtained for Nd0.6Yb0.4Fe3CoSb12compound.
Original languageEnglish
Pages (from-to)26-30
Number of pages5
JournalScripta Materialia
Volume116
DOIs
Publication statusPublished - 15 Apr 2016

Keywords

  • Melt-spinning
  • P-type filled skutterudites
  • Phonon scattering
  • Thermoelectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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