Glass composition, chemically strengthened glass, and glass substrate for information recording medium

The present invention provides a glass composition containing, in mass %: 59.0 to 63.0% SiO2; 4.0 to 10.0% TiO2; 8.0 to 12.0% Al2O3; 1.0 to 5.0% MgO; 0 to 4.0% CaO; 4.0 to 14.0% SrO; 4.0 to 11.0% Na2O; and 0 to 1.0% K2O. According to the present invention, it is possible to provide a glass compositi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Senshu Yutaka, Kurachi Junji
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY GLASS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER JOINING GLASS TO GLASS OR OTHER MATERIALS METALLURGY MINERAL OR SLAG WOOL PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS
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Beschreibung
Zusammenfassung:	The present invention provides a glass composition containing, in mass %: 59.0 to 63.0% SiO2; 4.0 to 10.0% TiO2; 8.0 to 12.0% Al2O3; 1.0 to 5.0% MgO; 0 to 4.0% CaO; 4.0 to 14.0% SrO; 4.0 to 11.0% Na2O; and 0 to 1.0% K2O. According to the present invention, it is possible to provide a glass composition having excellent heat resistance, being suitable for production by the float process, and being suitable for chemical strengthening.