Method of making refractory ceramic products and the products th

Details Method of making refractory ceramic products and the products th Method of making refractory ceramic products and the products th

1987-06-24

1993-11-09

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

264 63, 264 86, 264 87, 264 71, 501 95, C04B 3510

Patent

active

052600114

ABSTRACT:
The method of making refractory ceramic products in which a slurry is formed of water, powdered alumina, and amorphous fibers containing AL.sub.2 O.sub.3 and SiO.sub.2, the volume of water in the slurry being sufficient to permit the slurry to flow under vibration but insufficient to permit the slurry to flow without vibration, the fibers having a molecular ratio of Al.sub.2 O.sub.3 to SiO.sub.2 substantially less than 3 to 2 and the molecular ratio of Al.sub.2 O.sub.3 to SiO.sub.2 in the combined slurry being at least 3 to 2, thereater placing the slurry in a liquid absorbing mold and vibrating the slurry to fill the mold, then permitting the mold to absorb a portion of the water from the slurry to form a body, then removing the body from the mold and drying the body, and thereafter heating the body to combine silica and alumina from the fibers and powdered alumina to recrystalize the fibers in the from of mullite.

REFERENCES:
patent: 1910469 (1933-05-01), Kitsee
patent: 3216841 (1965-11-01), Thellmann
patent: 3835054 (1974-09-01), Olewinski et al.
patent: 4384046 (1983-05-01), Nakagami
patent: 4401613 (1983-08-01), Abell et al.
Baer et al, In Vitro Degradation of a Ceramic-Ceramic Composite, In Ceramic Bulletin, vol. 57, No. 2 (1978).

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