BinnerJACS.pdf (390.7 kB)
Evidence for the microwave effect during the annealing of zinc oxide
preprint
posted on 2007-10-18, 08:48 authored by J.G.P. Binner, Jianxin Wang, Vaidhy VaidhyanathanVaidhy Vaidhyanathan, N. Joomun, J. Kilner, G. Dimitrakis, T.E. CrossA 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’.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
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. 2693–2697Publisher
© The American Ceramic SocietyVersion
- SMUR (Submitted Manuscript Under Review)
Publication date
2007Notes
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/jaceISSN
0002-7820;1551-2916Publisher version
Language
- en