Composition and method for producing ceramic articles

Details Composition and method for producing ceramic articles Composition and method for producing ceramic articles

1980-09-12

1983-06-07

Bell, Mark

Compositions: coating or plastic

Coating or plastic compositions

Dental

433222, 433228, 501147, C09K 300, C04B 3313

Patent

active

043869629

ABSTRACT:
A composition is disclosed for use in forming ceramic articles having improved color, density, bonding strength and mechanical strength. Ceramic particles are slurried with a composition that tends to minimize inclusion of bubbles of gas, e.g., air, and also minimize interstitial voids between the ceramic particles. In a preferred mode, the ceramic particles are slurred with an aqueous solution of sodium hydroxide having, for example, a sodium hydroxide concentration, by weight, in the order of about 0.02% to about 0.03%. The aqueous solution of the sodium hydroxide is added to a powered ceramic until a workable past or slurry is obtained. Articles are formed using the paste or slurry or the paste or slurry is built-up on a support and the ceramic is then fired to fuse the particles.

REFERENCES:
patent: 1398014 (1921-11-01), Falton
patent: 1745102 (1930-01-01), Lambic et al.
patent: 1899584 (1933-02-01), Navies
patent: 2268131 (1941-12-01), Barker et al.
patent: 2686131 (1954-08-01), Combs
patent: 2890964 (1959-06-01), Commons, Jr. et al.
patent: 3037828 (1962-06-01), Michael
Kingery et al., Ceramic Fabrication Processes, Part I Slip Casting, pp. 15-19, 28-30 & 42, published by "The Technology Press of MIT & John Wiley & Sons N.Y., 1958, Library of Congress Card No. 58-6077.
Dodd, A; "Dictionary of Ceramics", published by Philosophical Library N.Y. 1964 pp. 80 & 116.

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