Ceramic articles having cordierite coatings

Details Ceramic articles having cordierite coatings Ceramic articles having cordierite coatings

1975-03-03

1977-03-29

McCarthy, Helen M.

Stock material or miscellaneous articles

Composite

Of quartz or glass

65 33, 106 396, 106 52, 106 53, 106 48, 106 49, C03C 322, C03C 1200

Patent

active

040150488

ABSTRACT:
Sinterable powdered glasses comprising MgO, Al.sub.2 O.sub.3, SiO.sub.2 and at least one modifying oxide selected from the group consisting of BaO, PbO, SrO and CaO, which are thermally-crystallizable at sintering temperatures to yield highly crystalline, low expansion, thermally stable glass-ceramic coatings comprising crystals of a structure corresponding to hexagonal cordierite as the crystal phase, are described. The use of the glasses to provide crystallized electrical barrier layers on glass-ceramic articles is also described.

REFERENCES:
patent: 3024303 (1962-03-01), Smothers et al.
patent: 3084053 (1963-04-01), Arlett et al.
patent: 3275493 (1966-09-01), MacDowell
patent: 3450546 (1969-06-01), Stong
patent: 3673049 (1972-06-01), Giffen et al.
patent: 3883337 (1975-05-01), Hengesson et al.
Karkhanavala, M. D. et al. - "The Polymorphism of Cordierite" J. Am. Cer. Soc. 36(12) pp. 389-392.
MacMillan, P. W. - Glass-Ceramics (1964) Academic Press New York - pp. 116-117, 134, 164-165.

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