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Title: Colloidal processing of sub-micron alumina powder compacts
Authors: Lim, L.C. 
Wong, P.M.
Ma, J.
Keywords: Alumina powder compact
Issue Date: May-1997
Citation: Lim, L.C.,Wong, P.M.,Ma, J. (1997-05). Colloidal processing of sub-micron alumina powder compacts. Journal of Materials Processing Technology 67 (1-3) : 137-142. ScholarBank@NUS Repository.
Abstract: This study investigates the compaction and sintering characteristics of narrow-size-distributed sub-micron alumina powder compacts. Near-mono-sized powder with a mean particle size of 0.18 μm was processed colloidally and then compacted by either centrifuging or slip casting. Green densities comparable to that of dense random compacts of equal-sized spheres were obtained over the range of suspension concentrations and compacting conditions explored. The resultant compacts had a uniform green microstructure and exhibited improved sintering characteristics, as opposed to those prepared by dry pressing. Full densification was achieved in 1 h at 1275°C, yielding a final grain size of about 0.5 μm. The effects of the initial particle size and the size distribution on the compacting and sintering characteristics of colloidally processed sub-micron alumina compacts are also presented and discussed. © 1997 Elsevier Science S.A.
Source Title: Journal of Materials Processing Technology
ISSN: 09240136
Appears in Collections:Staff Publications

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