GLASS FOR CHEMICAL STRENGTHENING AND METHOD FOR MANUFACTURING GLASS FOR CHEMICAL STRENGTHENING, AND CHEMICALLY STRENGTHENED GLASS AND IMAGE DISPLAY DEVICE PROVIDED WITH SAME

A glass for chemical strengthening that is a float-formed glass for chemical strengthening includes, as represented by mass percentage based on oxides, from 65 to 72% of SiO2, from 3.6 to 8.6% of Al2O3, from 3.3 to 6% of MgO, from 6.5 to 9% of CaO, from 13 to 16% of Na2O and from 0 to 0.9% of K2O. I...

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Bibliographische Detailangaben
Hauptverfasser:	MIURA Takenori, KASE Junichiro, MIYASAKA Junko, KAWAKAMI Masamichi
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES 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:	A glass for chemical strengthening that is a float-formed glass for chemical strengthening includes, as represented by mass percentage based on oxides, from 65 to 72% of SiO2, from 3.6 to 8.6% of Al2O3, from 3.3 to 6% of MgO, from 6.5 to 9% of CaO, from 13 to 16% of Na2O and from 0 to 0.9% of K2O. In the glass for chemical strengthening, (Na2O+K2O)/Al2O3 is from 2.2 to 5. The glass for chemical strengthening has a sheet thickness (t) of 0.1 mm or more and 2 mm or less. A SnO2 amount of a bottom surface in an unpolished state of the glass for chemical strengthening is 6.2 μg/cm2 or less (0.1≦t≦1 mm) or (2t+4.2) μg/cm2 or less (1