Ion exchangeable Li-containing glass compositions for 3-D forming

US10183887B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Marie Jacqueline Monique Comte · Fontenay-aux-Roses, FR
• Melinda Ann Drake · Corning, US
• Karen Leslie Geisinger · Big Flats, US
• Sinue Gomez · Corning, US
• Robert Michael Morena · Caton, US
• Charlene Marie Smith · Corning, US
• Randall Eugene Youngman · Horseheads, US

Key dates

• Filing date: Sep 28, 2017
• Grant date: Jan 22, 2019
• Expiry date: Sep 28, 2037

Classification

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

Abstract

According to one embodiment, a glass article may include SiO2, Al2O3, Li2O and Na2O. The glass article may have a softening point less than or equal to about 810° C. The glass article may also have a high temperature CTE less than or equal to about 27×10−6/° C. The glass article may also be ion exchangeable such that the glass has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 μm after ion exchange in a salt bath comprising KNO3 at a temperature in a range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.