ALKALI-FREE GLASS AND ALKALI-FREE GLASS SUBSTRATE

PROBLEM TO BE SOLVED: To propose an alkali-free glass which satisfies properties such as meltability and devitrification resistance and further reduced in or being substantially free of environmentally toxic components and to thereby obtain an environmentally friendly alkali-free glass substrate.SOL...

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Bibliographische Detailangaben
Hauptverfasser:	YANASE TOMOMOTO, MIWA NOBUYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS CHEMISTRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING GLASS JOINING GLASS TO GLASS OR OTHER MATERIALS MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES METALLURGY MINERAL OR SLAG WOOL NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS SURFACE TREATMENT OF GLASS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To propose an alkali-free glass which satisfies properties such as meltability and devitrification resistance and further reduced in or being substantially free of environmentally toxic components and to thereby obtain an environmentally friendly alkali-free glass substrate.SOLUTION: The alkali-free glass does not substantially contain an alkali metal oxide, AsOand SbOas a glass composition, and contains by mol%, 55 to 75% of SiO, 7 to 15% of AlO, 7 to 12% of BO, 0 to 3% of MgO, 7 to 12% of CaO, 0 to 5% of SrO, 0 to 2% of BaO, 0 to 5% of ZnO, 0.01 to 1% of SnOand has liquid phase viscosity of 10dPa s or more and temperature with high temperature viscosity of 10dPa s is 1550°C or lower.