STRENGTHENED GLASS PLATE AND GLASS PLATE FOR STRENGTHENING

A tempered glass sheet of the present invention is a tempered glass sheet having a compressive stress layer in a surface thereof, wherein the tempered glass sheet comprises as a glass composition, in terms of mol %, 50% to 75% of SiO2, 1% to 20% of Al2O3, 5% to 30% of B2O3, 0% to 15% of Li2O, 1% to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	NAGANO, Yuta
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 tempered glass sheet of the present invention is a tempered glass sheet having a compressive stress layer in a surface thereof, wherein the tempered glass sheet comprises as a glass composition, in terms of mol %, 50% to 75% of SiO2, 1% to 20% of Al2O3, 5% to 30% of B2O3, 0% to 15% of Li2O, 1% to 25% of Na2O, 0% to 10% of K2O, and 0% to 15% of P2O5, wherein the tempered glass sheet has a molar ratio [Al2O3]/[Na2O] of from 0.1 to 2.5, and wherein the tempered glass sheet satisfies the following relationship:[SiO2]−3×[Al2O3]−[B2O3]−2×[Li2O]−1.5×[Na2O]−[K2O]+1.2×[P2O5]≥−20%.