Glass ceramic articles having improved properties and methods for making the same

US11014848B2 · kind B2 · utility

Assignee

• CORNING INCORPORATED · US

Inventors

• Carol A. Click · Perrysburg, US
• James Howard Edmonston · Corning, US
• Qiang Fu · Beijing, CN
• Jill Marie Hall · Elmira, US
• Mathieu Hubert · Torino, IT
• Dhananjay Joshi · Corning, US
• Andrew Peter Kittleson · Honeoye Falls, US
• Katherine Weber Kroemer · Horseheads, US
• Galan Gregory Moore · West Henrietta, US
• Rohit Rai · Riverside, US
• John Richard Ridge · Hammondsport, US
• John Robert Saltzer, JR. · Corning, US
• Charlene Marie Smith · Corning, US
• Erika Lynn Stapleton · Lindley, US
• Matthew Daniel Trosa · Horseheads, US
• Ljerka Ukrainczyk · Corning, US
• Shelby Kerin Wilson · Corning, US
• Bin Yang · Corning, US
• Zheming Zheng · Horseheads, US

Key dates

• Filing date: Jul 12, 2019
• Grant date: May 25, 2021
• Expiry date: Jul 12, 2039

Classification

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

Abstract

A glass ceramic article including a lithium disilicate crystalline phase, a petalite crystalline phased, and a residual glass phase. The glass ceramic article has a warp (μm)<(3.65×10−9/μm×diagonal2) where diagonal is a diagonal measurement of the glass ceramic article in μm, a stress of less than 30 nm of retardation per mm of glass ceramic article thickness, a haze (%)<0.0994t +0.12 where t is the thickness of the glass ceramic article in mm, and an optical transmission (%)>0.91×10(2-0.03t) of electromagnetic radiation wavelengths from 450 nm to 800 nm, where t is the thickness of the glass ceramic article in mm.