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Nanostructuring of undoped ZnSb by Cryo-Milling

Nanostructuring of undoped ZnSb by Cryo-Milling

Category
Journal publication
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.
Client
  • Norges forskningsråd / 216078
  • Notur/NorStore / NN2615K
Language
English
Author(s)
Affiliation
  • University of Oslo
  • University of Oslo
  • SINTEF Industry / Sustainable Energy Technology
  • SINTEF Industry / Materials and Nanotechnology
  • California Institute of Technology
  • University of Oslo
Year
2015
Published in
Journal of Electronic Materials
ISSN
0361-5235
Volume
44
Issue
8
Page(s)
2578 - 2584