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

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 l...

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Bibliographische Detailangaben
Hauptverfasser:	TUENKER, GERHARD
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	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 K2O, 10-25% of B2O3, 15-30% of TiO2, 30 to 55% of SiO2, 0-5% of Al2O3, 0-5% of Bi2O3, 0.05-3% of Fe2O3 (total iron) and 0.1-3% of sulphur (total sulphur).