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Nanostructuring of undoped ZnSb by Cryo-Milling

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.

Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Industry / Sustainable Energy Technology
  • SINTEF Industry / Materials and Nanotechnology
  • University of Oslo
  • California Institute of Technology

Year

2015

Published in

Journal of Electronic Materials

ISSN

0361-5235

Volume

44

Issue

8

Page(s)

2578 - 2584

View this publication at Norwegian Research Information Repository