Strengthened glass and compositions therefor

US10144198B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Jeffrey Scott Cites · Horseheads, US
• Thomas Michael Cleary · Elmira, US
• James Gregory Couillard · Ithaca, US
• Sinue Gomez · Corning, US
• Michael J. Moore · Beverly Hills, US
• Robert Michael Morena · Caton, US
• James Joseph Price · Corning, US
• Charles Mitchel Sorensen, Jr. · Corning, US
• Jonathan Earl Walter · Woodhull, US

Key dates

• Filing date: Apr 29, 2015
• Grant date: Dec 4, 2018
• Expiry date: Apr 7, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/315
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass laminate structure comprising an external glass sheet and an internal glass sheet wherein one or both of the glass sheets comprises SiO2+B2O3+Al2O3≥86.5 mol. %. and R2O—RO—Al2O3<about 5 mol. %. Exemplary glass sheet can comprise between about 69-80 mol. % SiO2, between about 6-12 mol. % Al2O3, between about 2-10 mol. % B2O3, between about 0-5 mol. % ZrO2, Li2O, MgO, ZnO and P2O5, between about 6-15 mol. % Na2O, between about 0-3 mol. % K2O and CaO, and between about 0-2 mol. % SnO2 to provide a mechanically robust and environmentally durable structure.