Abstract
The research described herein is directed at establishing an enhanced understanding of the basic processing behavior of uniform fine ceramic powders. Monosized colloidal silica has been used as a model system to determine the effects of the processing conditions on consolidation behavior (particle packing) during pressure filtration from aqueous suspensions. In this study, 0.3 and 0.6 μm SiO2 powders were pressure filtered (20–40 psi) to determine the effects of the solids loading and state of dispersion on the green density, cake permeability, specific cake resistance, microstructural uniformity, and pore size distribution of the SiO2 green bodies. Pressure filtration from aqueous dispersions with increased solids loading resulted in lowered green densities, decreased specific cake resistance (to fluid flow), αc, increased permeability, Kc, and increased median pore size. Similar effects were observed when green bodies were formed from low pH (agglomerated) as opposed to high pH (dispersed) aqueous suspensions. Pressure filtration of monosized colloidal silica produced green bodies with uniform (non-ordered) particle arrangements.
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© 1987 Plenum Press, New York
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Velazquez, M., Danforth, S.C. (1987). Pressure Filtration of Monosized Colloidal Silica. In: Mittal, K.L. (eds) Surface and Colloid Science in Computer Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-1905-4_5
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DOI: https://doi.org/10.1007/978-1-4613-1905-4_5
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