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

Patent metadata

Field	Value
Publication number	US-12071364-B2
Application number	US-202318133106-A
Country	US
Kind code	B2
Filing date	Apr 11, 2023
Priority date	Jul 16, 2018
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

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.

First claim

What is claimed is:

1. A glass-ceramic article comprising:
a first surface;
a second surface opposing the first surface;
one or more crystalline phases;
a residual glass phase;
a compressive stress layer extending from the first surface to a depth of compression (DOC);
a maximum central tension greater than 90 MPa;
a stored tensile energy greater than 22 J/m 2 ;
Young's modulus greater than 95 GPa; and
a haze less than 0.2.

2. The glass-ceramic article of claim 1 , wherein the Young's modulus is in a range from greater than 95 GPa to 110 GPa.

3. The glass-ceramic article of claim 1 , wherein a ratio of Li 2 O (mol %)/R 2 O (mol %) is greater than 0.85, wherein R 2 O is a sum of alkali metal oxides.

4. The glass-ceramic article of claim 1 , further comprising ZrO 2 in a range from 1.7 mol % to 4.5 mol %.

5. A glass-ceramic article comprising:
a first surface;
a second surface opposing the first surface;
one or more crystalline phases;
a residual glass phase;
a compressive stress layer extending from the first surface to a depth of compression (DOC);
a maximum central tension greater than 90 MPa;
a stored tensile energy greater than 22 J/m 2 ;
ZrO 2 in a range from 1.7 mol % to 4.5 mol %; and
a ratio of LiO 2 (mol %)/R 2 O (mol %) is greater than 0.85, wherein R 2 O is a sum of alkali metal oxides.

6. The glass-ceramic article of claim 1 , wherein the residual glass phase is less than or equal to 50 wt % of the glass-ceramic article.

7. The glass-ceramic article of claim 1 , wherein the one or more crystalline phases comprises petalite.

8. The glass-ceramic article of claim 1 , wherein the one or more crystalline phases comprises lithium disilicate.

9. The glass-ceramic article of claim 1 , wherein a sum of crystalline phases other than lithium disilicate and petalite is less than 1 wt % of the glass-ceramic article.

10. The glass-ceramic article of claim 1 , wherein the glass-ceramic article is transparent and has a transmittance of at least 85% for light in a wavelength range from 450 nm to 800 nm at a thickness of 1 mm.

11. The glass-ceramic article of claim 1 , wherein the glass-ceramic article breaks into less than 5 fragments when subjected to the Fragment Test.

12. The glass-ceramic article of claim 1 , wherein the maximum central tension is in a range from greater than 90 MPa to 180 MPa.

13. The glass-ceramic article of claim 1 , wherein the stored tensile energy is in a range from greater than 22 J/m 2 to 60 J/m 2 .

14. The glass-ceramic article of claim 1 , further comprising grains having a longest dimension of 150 nm or less.

Assignees

• Corning Inc

Inventors

• Click Carol Ann
• Edmonston James Howard
• Fu Qiang
• Hall Jill Marie
• Hubert Mathieu Gerard Jacques
• Joshi Dhananjay
• Kittleson Andrew Peter
• Kroemer Katherine Weber
• Moore Galan Gregory
• Rai Rohit
• Ridge John Richard
• Saltzer Jr John Robert
• Smith Charlene Marie
• Stapleton Erika Lynn
• Trosa Matthew Daniel
• Ukrainczyk Ljerka
• Wilson Shelby Kerin
• Yang Bin
• Zheng Zheming

Classifications

• C03C10/0027 Primary

  containing SiO2, Al2O3, Li2O as main constituents · CPC title

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title

• H05K5/03

  Covers · CPC title

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C4/18

  for ion-sensitive glass · CPC title