Black glass frit, process for the production thereof and use the

Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...

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501 17, 501 23, 501 65, 501 68, 501 77, 296 841, C03C 802

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057100810

ABSTRACT:
Using conventional glass frits for the production of black glass coating compositions makes it necessary also to use a relatively large quantity of black pigments. The quantity of pigment used may be reduced by using black glass frits according to the invention, thin layers of which already have a low transmission.
The glass frit according to the invention is black and contains in the glass composition (in mol. %): 10-17% of K.sub.2 O, 10-25% of B.sub.2 O.sub.3, 15-30% of TiO.sub.2, 30 to 55% of SiO.sub.2, 0-5% of Al.sub.2 O.sub.3, 0-5% of Bi.sub.2 O.sub.3, 0.05-3% of Fe.sub.2 O.sub.3 (total iron) and 0.1-3% of sulphur (total sulphur).

REFERENCES:
patent: 3216847 (1965-11-01), Armant
patent: 3654505 (1972-04-01), Davis et al.
patent: 5250475 (1993-10-01), Zybell et al.
patent: 5512521 (1996-04-01), Fu et al.
Tupy et al.. Chemical Abstracts, vol. 90, No. 24, 11 Jun. 1979 Abstract No. 191464v.

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