Glass articles with residual stress and viscosity properties for sagging processes, and compositions for the same

US12179459B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Heather Debra Boek · Corning, US
• Venkatesh Botu · Corning, US
• Timothy Michael Gross · Waverly, US
• Balamurugan Sundaram · Dunlap, US
• Adama Tandia · Nelson, US
• Lisa Anne Tietz Moore · Corning, US
• Kochuparambil Deenamma Vargheese · Horseheads, US
• Mark Owen Weller · Corning, US

Key dates

• Filing date: Nov 1, 2019
• Grant date: Dec 31, 2024
• Expiry date: Jul 15, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2204/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A laminate glass article is provided that includes: a core glass layer comprising a first coefficient of thermal expansion (CTE); and a plurality of clad glass layers, each comprising a first primary surface, a second primary surface in contact with the core glass layer and a second CTE that is lower than the first CTE of the core glass layer. The difference in the first and second CTE is about 10×10−7/#C to about 70×10−7/#C. Further, each of the core glass layer and the clad glass layers comprises a viscosity from 109.0 to 1014.0 Poise from about 550 #C to about 700 #C.