High-alumina content compositions containing BaO-MgO-SiO.sub.2 g

Details High-alumina content compositions containing BaO-MgO-SiO.sub.2 g High-alumina content compositions containing BaO-MgO-SiO.sub.2 g

1975-11-07

1977-04-26

McCamish, Marion E.

Stock material or miscellaneous articles

Composite

Of quartz or glass

428325, 428329, 428303, 428331, 428434, 428446, 428539, B32B 2740

Patent

active

040202348

ABSTRACT:
The compositions of the present invention comprise alumina and minor proportions of a ternary glass sintering aid from the system: BaO-MgO-SiO.sub.2. The compositions can be sintered in a reducing atmosphere to provide ceramics which find particular utility in electrical devices, e.g., in multilayer ceramic sandwiches. The compositions are particularly amenable to formation by doctor blade slip casting techniques.

REFERENCES:
patent: 2760875 (1956-08-01), Schwartzwalder et al.
patent: 3019116 (1962-01-01), Doucette
patent: 3167438 (1965-01-01), Bristow
patent: 3238048 (1966-03-01), Somers
patent: 3501322 (1970-03-01), Dumbaugh, Jr. et al.
Phase Diagrams for Ceramists, Levin et al, eds., 1969 Supplement, p. 127, Fig. 2458, Am. Cer. Soc., Inc., (1969).
Kaiser et al., "A Fabrication Technique for Multilayer Ceramic Modules," Solid State Technology/May 1972. pp. 35-40.

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