High solids content gels and a process for producing them

Details High solids content gels and a process for producing them High solids content gels and a process for producing them

1991-02-26

1993-07-13

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

51309, 501 12, 501153, C04B 3510

Patent

active

052271048

ABSTRACT:
A method is described for producing hard, dense, finely crystalline fired bodies from alumina gels of solids content greater than 45%, by the use of high pressure in mixing and/or presssure extrusion together with seeding of the gel by submicron alpha alumina particles.

REFERENCES:
patent: 3108888 (1963-10-01), Bugosh
patent: 3808015 (1974-04-01), Seufert
patent: 3853688 (1974-12-01), D'Ambrosio
patent: 3953561 (1976-04-01), Shin
patent: 4314827 (1982-02-01), Leitheiser et al.
patent: 4379134 (1983-04-01), Weber et al.
patent: 4623364 (1986-11-01), Cottringer et al.
"Enhanced Densification of Boehmite Sol-Gels by .alpha.-Alumina Seeding", by Kumagai, pp. C-230/1, Nov. 1984.
Blakelock et al.--"The Production and Properties of Polycrystalline Alumina Rods and Fibres", In British Ceramic Soc., No. 15, Jan. 1970, pp. 69-83.

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