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Anomalous evaporation behavior of ZnO powder milled mechanically under high-energy conditions

journal contribution
posted on 29.02.2008, 00:00 authored by Alexey Glushenkov, H Zhang, Ying (Ian) ChenYing (Ian) Chen
ZnO powder showed anomalous evaporation behavior after its mechanical milling treatment under high-energy conditions. The amount of generated vapor is about 10 times higher in the first 15 min of annealing at 1300 °C than that of unmilled ZnO powders. The strong ball impacts are responsible for the greatly enhanced evaporation ability. Low-energy ball milling involving shearing actions and rare weak impacts leads only to a small evaporation rate enhancement. The possible explanation of the high evaporation rate of the heavily milled material is the existence of large fraction of weakly bonded atoms in grain boundaries, surface defects and strained areas.

History

Journal

Materials letters

Volume

62

Issue

4-5

Pagination

715 - 718

Publisher

Elsevier B. V.

Location

Amsterdam, The Netherlands

ISSN

0167-577X

eISSN

1873-4979

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2007, Elsevier B.V.