Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1983-12-23
1986-08-26
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
423331, 264 61, 501 12, 501109, 501121, 501122, C04B 3514
Patent
active
046082158
ABSTRACT:
Ceramic materials comprising steatite or forsterite which are highly dense in nature may be prepared by admixing a hydrolyzed alcoholic solution of a silicon alkoxide with a solution prepared by adding an organomagnesium compound to an alcohol at gelation conditions. Following the formation of the gel, it is then dried at an elevated temperature of from about 300.degree. to about 500.degree. C. to remove volatile compounds as well as to decompose any remaining organic compounds and thereafter the powder is pressed into a desired shape. The formed shape is then sintered at a temperature in the range of from about 850.degree. to about 950.degree. C. to form a densified ceramic.
REFERENCES:
patent: 3811899 (1974-05-01), Stibbs
patent: 3971665 (1976-07-01), Suzuki et al.
patent: 3979215 (1976-09-01), Emblem
patent: 4278632 (1981-07-01), Yoldas
Singer et al., Industrial Ceramics, Chapman and Hall, London, 1963, pp. 425, 1201-1204, 1222-1225.
Gonczy Stephen T.
Lawson Randy J.
Rosen Bruce I.
Allied Corporation
Derrington James
McBride Thomas K.
Nelson Raymond H.
Spears Jr. John F.
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