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Theory of Filtration of Ceramics: II, Slip Casting on Radial Surfaces
Author(s) -
Tiller Frank M.,
Hsyung Niey B.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb07319.x
Subject(s) - mold , slip (aerodynamics) , compressibility , ceramic , materials science , capillary action , composite material , mechanics , slurry , permeability (electromagnetism) , capillary pressure , planar , thermodynamics , chemistry , membrane , porosity , physics , porous medium , biochemistry , computer graphics (images) , computer science
The theory of filtration of slip casting of incompressible beds of ceramic materials in planar molds is extended to deposition on internal and external cylindrical surfaces. Formulas are developed for (a) calculating the variation of the liquid pressure in both cake and mold as a function of the radius and (b) determining the time to produce a given thickness of a consolidated body. Assuming that the mold permeability K m and capillary suction P cap are related by an inverse parabolic relation, K m P cap 2 = J , there is a mold with a specific permeability that produces a maximum rate of deposition from the slip. The theory presented in this paper strictly applies only to incompressible cakes and should be used cautiously with moderately compactible beds. For highly flocculated slurries yielding highly compressible bodies, the equations would not be expected to yield reliable results. Radial geometry leads to mathematical complexities not encountered in analyses of planar molds.