C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
23/241, 261/38
C01F 7/02 (2006.01) C04B 35/113 (2006.01)
Patent
CA 1087374
ABSTRACT OF THE DISCLOSURE A stabilized slurry of Beta-type alumina powder, a method of stabilizing said slurry of Beta-type alumina and a method of pro- ducing minute, spherical agglomerates of said Beta-type alumina by spray drying said stabilized slurry. Said stabilized slurry exhibits a prolonged viscosity sufficiently low to accomodate spray drying techniques to produce said minute spherical agglomerates capable of rapid filling in ceramic forming pressing machinery. Beta-type alumina powder is mixed with water and other conventional additives to form a slurry mixture. A small amount of a polycarboxylic acid containing 3 or more carbon atoms and being capable of chelating with aluminum ion is added as a dispersing agent to inhibit any substantial increase in viscosity. The maintenance of moderate to low viscosity permits application of such slurry to above processes for forming Beta-type alumina agglomerates which rely for formation on a low viscosity, uniformly dispersed stabilized slurry. The invention herein described was made in the course of or under a contract or subcontract thereunder with the National Science Foundation.
271936
Gordon Ronald S.
Miller Mark L.
Ford Motor Company
Hewitt Neville S.
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