Process for producing ceramic precursor powders without gel formation
AssigneeAkzo N.V.
InventorsLieh-Jiun Shyu, Fawzy G. Sherif
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Abstract
The addition of an aqueous solution containing one or more cations intended in a metal oxide ceramic product to a base to precipitate a calcinable metal oxide ceramic precursor reduces gelation problems during the precipitation of the precursor.
Claims8
In a process for forming a ceramic precursor composition, suitable for calcining to form a metal oxide ceramic product, by the combining of an aqueous solution containing at least one metal cation for the ceramic with a concentration of from about 15 gm to 40 gm of metal cation, expressed as oxide, per 100 ml of water, and base precipitating agent to form a precipitate of the ceramic precursor composition, wherein the improvement comprises adding the aqueous solution to the base precipitating agent to produce a pH above the zero point charge for the precipitate and to reduce gelation during the formation of the precipitate which comprises agglomerated particles of 25 to 100 micron size.
Dependencies are inferred from the claim text.