COMPOSITIONS DE VERRE OPALE

This invention relates to spontaneously opacifiable glasses containing fluorine and having as the principal opacifying phase an immiscible, or insoluble, fluorine containing glass; the opal is an alkali aluminosilicate glass with additions of divalent oxides, fluorine, and boric-oxide. These glasses...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	J.E. FLANNERY, W.H. DUMBAUGH JR, G.B. HARES
Format:	Patent
Sprache:	fre
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:	This invention relates to spontaneously opacifiable glasses containing fluorine and having as the principal opacifying phase an immiscible, or insoluble, fluorine containing glass; the opal is an alkali aluminosilicate glass with additions of divalent oxides, fluorine, and boric-oxide. These glasses are opacified by cooling the glass body from the melt to a temperature below about the opal liquidus thereof at a rate greater than about 2 DEG C./minute so as to homogeneously separate an insoluble glassy opacifying phase.