Alkaline-earth aluminoborosilicate glass and the uses thereof

US6680266B1 · kind B1 · utility

Assignee

• Schott Glas · DE

Inventors

• Ulrich Peuchert · Bodenheim, DE
• Peter Brix · Mainz, DE
• Andreas Hübner · Unna, DE

Key dates

• Filing date: Jun 14, 2002
• Grant date: Jan 20, 2004
• Expiry date: Jun 14, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/093
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to low-alkali or alkali-free alkaline-earth aluminoborosilicate glasses of the following composition (in wt.-% on an oxide basis) SiO2>49-65; B2O3 0.5-4.5; Al2O3>10-23; MgO>2.7-7; CaO 0.5-10; SrO>15-22; BaO 0.5-7; provided that MgO+CaO+SrO+BaO>20-35; SnO2 0-2; ZrO2 0-2; ZrO2 0-2; TiO20-2; CeO20-1.5; ZnO 0-1; Na2O 0-2; K2O 0-2; provided that Na2O+K2O equals 0-3. The inventive glasses are especially suitable for use as substrates in thin film photovoltaic technology and as glasses for bulbs.