Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1990-01-09
1995-08-29
Lewis, Michael
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423122, C01F 720
Patent
active
054458072
ABSTRACT:
A method of manufacture including bringing seed and aluminum hydroxide together in an aqueous medium and hydrothermally digesting for producing boehmite at the expense of the aluminum hydroxide is described. Also disclosed is a process for forming a ceramic body from colloidal boehmite and alpha alumina. Alpha alumina is added to ultimately produce a seeded gel containing microcrystalline boehmite, the seeded gel capable of being sintered at a low temperature to produce a ceramic product. The colloidal boehmite may be purified by ion exchange to remove alkali metal ions.
REFERENCES:
patent: 4797139 (1989-01-01), Bauer
patent: 4835124 (1989-05-01), Pearson
Aluminum Company of America
Hendrickson Stuart L.
Lewis Michael
Mueller Douglas P.
Sullivan Jr. Daniel A.
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