Boron-free universal glass

US9096461B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventor

• Peter Brix · Mainz, DE

Key dates

• Filing date: Jun 10, 2013
• Grant date: Aug 4, 2015
• Expiry date: Jul 4, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C3/087
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Universal glasses are provided which have the composition, in percent by weight on an oxide basis, 65-75 of SiO2, 11-18 of Al2O3, 5-10 of MgO, 5-10 of CaO, which are free of B2O3, SrO, BaO, CeO2 and PbO and have a hydrolytic resistance in the first class in accordance with DIN ISO 719, an acid resistance at least in the second class in accordance with DIN 12116 and an alkali resistance at least in the second class in accordance with DIN ISO 695.