Nanostructuring of Undoped ZnSb by Cryo-Milling

X. Song*, K. Valset, J. S. Graff, A. Thøgersen, A. E. Gunnæs, S. Luxsacumar, O. M. Løvvik, G. J. Snyder, T. G. Finstad

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We report the preparation of nanosized ZnSb powder by cryo-milling. The effect of cryo-milling then hot-pressing of undoped ZnSb was investigated and compared with that of room temperature ball-milling and hot-pressing under different temperature conditions. ZnSb is a semiconductor with favorable thermoelectric properties when doped. We used undoped ZnSb to study the effect of nanostructuring on lattice thermal conductivity, and with little contribution at room temperature from electronic thermal conductivity. Grain growth was observed to occur during hot-pressing, as observed by transmission electron microscopy and x-ray diffraction. The thermal conductivity was lower for cryo-milled samples than for room-temperature ball-milled samples. The thermal conductivity also depended on hot-pressing conditions. The thermal conductivity could be varied by a factor of two by adjusting the process conditions and could be less than a third that of single-crystal ZnSb.

Original languageEnglish (US)
Pages (from-to)2578-2584
Number of pages7
JournalJournal of Electronic Materials
Volume44
Issue number8
DOIs
StatePublished - Aug 1 2015

Keywords

  • Nanostructuring
  • thermal conductivity
  • thermoelectric materials
  • ZnSb

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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