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Enhanced casting rate by dynamic heating during slip casting
journal contribution
posted on 2007-01-23, 10:12 authored by Yongheng Zhang, J.G.P. BinnerThe slip casting process is widely used to consolidate ceramic particles from aqueous suspensions to form green compacts, particularly
those with complicated shapes. Raising the slip temperature during slip casting is known to increase the casting rate, this is
believed to be via a decrease in water viscosity. However, differences have been observed when using convection and microwave
heating to raise the temperature. In the present work, it has been found that the use of short-pulses of microwave energy to heat the
casting system dynamically causes a greater degree of acceleration than when using conventional radiant heating. The increased
uptake of water from the slip by the porous mould is believed to be indicative of a vaporisation–condensation cycle mechanism. A
negative pressure would be created during the condensation stage of the cycle, acting as an additional suction force to the capillary
action and hence accelerating the casting process.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Pages
532108 bytesCitation
ZHANG, Y. and BINNER, J.G.P., 2002. Enhanced casting rate by dynamic heating during slip casting. Journal of the European Ceramic Society, 22, pp. 135-142Publisher
© ElsevierPublication date
2002Notes
This is Restricted Access. This article was published in the journal, Journal of the European Ceramic Society [© Elsevier] and is available at: http://www.sciencedirect.com/science/journal/09552219.ISSN
0955-2219Language
- en