Method of preparing glazes

Details Method of preparing glazes Method of preparing glazes

1975-11-26

1977-08-02

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

65 30R, 106 48, C03C 308, C03C 1722

Patent

active

040393399

ABSTRACT:
The present invention relates to a method of producing a borosilicate glass exhibiting a low coefficient of thermal expansion, viz., less than about 20 .times. 10.sup..sup.-7 /.degree. C. over the range of room temperature to 300.degree. C., an ability to withstand repeated thermal cycling between room temperature and temperatures up to 1300.degree. C. and higher without devitrification, and the ability to flow, when present in particulate form, at temperatures between about 1000.degree.-1250.degree. C. The method contemplates impregnating a porous, essentially alkali metal-free, high silica material with a solution or a molten mass of a B.sub.2 O.sub.3 -containing compound, the B.sub.2 O.sub.3 -containing compound also being essentially free from alkali metals. The impregnated glass is thereafter dried to eliminate any solvent. High emissivity can be imparted by incorporating minor amounts of such materials as CoO, NiO, MoO.sub.3, Fe.sub.2 O.sub.3, and V.sub.2 O.sub.5 as dopants during the impregnation step. The impregnated material is especially useful as a glaze to provide an impervious coating on high purity silica insulating tiles.

REFERENCES:
patent: 1526423 (1925-02-01), Keyes
patent: 2106744 (1938-02-01), Hood et al.
patent: 2314824 (1943-03-01), Greene
patent: 3054221 (1962-09-01), Elmer
patent: 3489579 (1970-01-01), Steverding
patent: 3513109 (1970-05-01), Stiles
patent: 3762936 (1973-10-01), Iler
patent: 3782982 (1974-01-01), Pierson et al.
patent: 3827893 (1974-08-01), Meissner et al.
patent: 3843341 (1974-10-01), Hammel et al.
patent: 3938974 (1976-02-01), Macedo et al.
patent: 3955034 (1976-05-01), Fletcher

Affiliated with

Also associated with

Rating

Method of preparing glazes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of preparing glazes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of preparing glazes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2296745