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Title: Evidence for the microwave effect during the annealing of zinc oxide
Authors: Binner, J.G.P.
Wang, Jianxin
Vaidhyanathan, Bala
Joomun, N.
Kilner, J.
Dimitrakis, G.
Cross, T.E.
Keywords: Annealing
Zinc oxide
Issue Date: 2007
Publisher: © The American Ceramic Society
Citation: BINNER, J.G.P. ... et al, 2007. Evidence for the microwave effect during hybrid sintering. Journal of the American Ceramic Society,90 (9), pp. 2693–2697
Abstract: A microwave/conventional hybrid furnace has been used to anneal virtually fully dense zinc oxide ceramics under pure conventional and a microwave/conventional hybrid heating regime with a view to obtaining evidence for the ‘microwave effect’ during the resulting grain growth. In each case it was ensured that each sample within a series had an identical thermal history in terms of its temperature/time profile. The results showed that grain growth was enhanced during hybrid heating compared to pure conventional heating; the greatest enhancement, a factor of ~3 increase in average grain size, was observed in the range 1100-1150°C. The grain growth exponent decreased from 3 during conventional heating to 1.4 during hybrid heating in this temperature range, suggesting an acceleration of the diffusional processes involved. Temperature gradients within the samples were found to be too small to explain the results. This suggests that clear evidence has been found to support the existence of a genuine ‘microwave effect’.
Description: This is a pre-print of an article published in the journal, Journal of the American Ceramic Society [© Blackwell]. The definitive version: BINNER, J.G.P. ... et al, 2006. Evidence for the microwave effect during hybrid sintering. Journal of the American Ceramic Society,89 (6), pp. 1977-1984, is available at: http://www.blackwell-synergy.com/loi/jace
Version: Submitted for publication
URI: https://dspace.lboro.ac.uk/2134/3029
Publisher Link: http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1551-2916
ISSN: 0002-7820
Other Identifiers: 10.1111/j.1551-2916.2006.01363.x
Appears in Collections:Published Articles (Materials)

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