BETA-SPODUMENE GLASS-CERAMICS THAT ARE WHITE, OPALESCENT, OR OPAQUE, WITH LOW TITANIUM CONTENT, AND TIN-FINED

The present application relates to glass-ceramics that are white, opalescent or opaque, of the lithium aluminosilicate (LAS) type, containing a solid solution of β-spodumene as the main crystalline phase. The application also provides articles that are constituted, at least in part, of said glass-ce...

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Bibliographische Detailangaben
Hauptverfasser:	Lehuede, Philippe, Comte, Marie
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR MAKING BEVERAGES CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY COFFEE MILLS DOMESTIC ARTICLES OR APPLIANCES ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FURNITURE GLASS HUMAN NECESSITIES JOINING GLASS TO GLASS OR OTHER MATERIALS KITCHEN EQUIPMENT MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL SPICE MILLS SUCTION CLEANERS IN GENERAL SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	The present application relates to glass-ceramics that are white, opalescent or opaque, of the lithium aluminosilicate (LAS) type, containing a solid solution of β-spodumene as the main crystalline phase. The application also provides articles that are constituted, at least in part, of said glass-ceramics, precursor glasses for said glass-ceramics, and a method of preparing said article. Said glass-ceramics have a composition that is free from arsenic oxide and antimony oxide, with the exception of inevitable traces, and that contains the following, expressed as percentages by weight of oxides: 60% to 70% of SiO2, 18% to 23% of Al2O3, 3.0% to 4.3% of Li2O, 0 to 2% of MgO, 1 to 4% of ZnO, 0 to 4% of BaO, 0 to 4% of SrO, 0 to 2% of CaO, 1.3% to 1.75% of TiO2, 1% to 2% of ZrO2, 0.05% to 0.6% of SnO2, 0 to 2% of Na2O, 0 to 2% of K2O, 0 to 2% of P2O5, 0 to 2% of B2O3, with Na2O+K2O+BaO+SrO+CaO≤6% and Na2O+K2O≤2%, and a maximum of 500 ppm of Fe2O3.