Colored glass articles having improved mechanical durability

Patent metadata

Field	Value
Publication number	US-12378152-B2
Application number	US-202318096809-A
Country	US
Kind code	B2
Filing date	Jan 13, 2023
Priority date	Jun 18, 2021
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

A colored glass article includes from 40 mol % to 70 mol % SiO 2 ; from 8 mol % to 20 mol % Al 2 O 3 ; from 1 mol % to 10 mol % B 2 O 3 ; from 1 mol % to 20 mol % Li 2 O; from 1 mol % to 15 mol % Na 2 O; from 0 mol % to 8 mol % MgO; from 0 mol % to 5 mol % ZnO; and from 0.0005 mol % to 1 mol % Au. MgO+ZnO is from 0.1 mol % to 6 mol %.

First claim

What is claimed is:

1. A glass composition comprising:
greater than or equal to 40 mol % and less than or equal to 70 mol % SiO 2 ;
greater than or equal to 8 mol % and less than or equal to 20 mol % Al 2 O 3 ;
greater than or equal to 1 mol % and less than or equal to 10 mol % B 2 O 3 ;
greater than or equal to 1-7 mol % and less than or equal to 20 mol % Li 2 O;
greater than or equal to 1 mol % and less than or equal to 15 mol % Na 2 O;
greater than or equal to 0 mol % and less than or equal to 6 mol % MgO;
greater than or equal to 0 mol % and less than or equal to 5 mol % ZnO; and
greater than or equal to 1×10 −6 mol % and less than 0.01 mol % Au.

2. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.1 mol % and less than or equal to 1 mol % K 2 O.

3. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.1 mol % and less than or equal to 5 mol % MgO.

4. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.1 mol % and less than or equal to 2 mol % ZrO 2 .

5. The glass composition of claim 1 , wherein the glass composition comprises greater than or equal to 0.01 mol % and less than or equal to 1 mol % SnO 2 .

6. The glass composition of claim 1 , wherein R 2 O is greater than or equal to 8 mol % and less than or equal to 35 mol %, wherein R 2 O is the sum of Li 2 O, Na 2 O, and K 2 O.

7. The glass composition of claim 1 , wherein MgO+ZnO is greater than or equal to 0.5 mol % and less than or equal to 5.5 mol %.

8. The glass composition of claim 1 , wherein R 2 O—Al 2 O 3 is greater than or equal to −3 mol % and less than or equal to 2 mol %.

9. The glass composition of claim 1 , wherein [(5.72×mol % of Al 2 O 3 )−(21.4×mol % of ZnO)−(2.5×mol % of P 2 O 5 )−(35×mol % of Li 2 O)−(16.6×mol % of B 2 O 3 )−(20.5×mol % of MgO)−(23.3×mol % of Na 2 O)−(27.9×mol % of SrO)−(18.5×mol % of K 2 O)−(26.3×mol % of CaO)] is greater than −609 mol %.

10. A colored glass article comprising:
greater than or equal to 40 mol % and less than or equal to 70 mol % SiO 2 ;
greater than or equal to 8 mol % and less than or equal to 20 mol % Al 2 O 3 ;
greater than or equal to 1 mol % and less than or equal to 10 mol % B 2 O 3 ;
greater than or equal to 7 mol % and less than or equal to 20 mol % Li 2 O;
greater than or equal to 1 mol % and less than or equal to 15 mol % Na 2 O;
greater than or equal to 0 mol % and less than or equal to 6 mol % MgO;
greater than or equal to 0 mol % and less than or equal to 5 mol % ZnO; and
greater than or equal to 1×10 −6 mol % and less than 0.01 mol % Au.

11. The colored glass article of claim 10 , wherein the colored glass article has a transmittance color coordinate in the CIELAB color space as measured at an article thickness of 1.33 mm under F2 illumination and a 10° standard observer angle of:
L* greater than or equal to 65 and less than or equal to 98;
a* greater than or equal to −10 and less than or equal to 25; and
b* greater than or equal to −20 and less than or equal to 5.

12. The colored glass article of claim 10 , wherein the colored glass article has a thickness greater than or equal to 250 μm and less than or equal to 6 mm.

13. A consumer electronic device, comprising:
a housing having a front surface, a back surface, and side surfaces; and
electrical components provided at least partially within the housing, the electrical components including at least a controller, a memory, and a display, the display being provided at or adjacent the front surface of the housing;
wherein the housing comprises the colored glass article of claim 10 .

14. The colored glass article of claim 10 , wherein the colored glass article is an ion-exchanged colored glass article.

15. The colored glass article of claim 14 , wherein the ion-exchanged colored glass article has a depth of compression 3 μm or greater.

16. The colored glass article of claim 14 , wherein the ion-exchanged colored glass article has a thickness “t” and a depth of compression greater than or equal to 0.15t.

17. The colored glass article of claim 14 , wherein the ion-exchanged colored glass article has a surface compressive stress greater than or equal to 300 MPa.

18. The colored glass article of claim 14 , wherein the ion-exchanged colored glass article has a maximum central tension greater than or equal to 40 MPa.

19. A method of forming a colored glass article, the method comprising:
heat treating a glass composition to form a glass article, the glass composition comprising:
greater than or equal to 40 mol % and less than or equal to 70 mol % SiO 2 ;
greater than or equal to 8 mol % and less than or equal to 20 mol % Al 2 O 3 ;
greater than or equal to 1 mol % and less than or equal to 10 mol % B 2 O 3 ;
greater than or equal to 7 mol % and less than or equal to 20 mol % Li 2 O;
greater than or equal to 1 mol % and less than or equal to 15 mol % Na 2 O;
greater than or equal to 0 mol % and less than or equal to 6 mol % MgO;
greater than or equal to 0 mol % and less than or equal to 5 mol % ZnO; and
greater than or equal to 1×10-6 mol % and less than 0.01 mol % Au; and

subjecting the glass article to a heat treatment cycle at a temperature greater than or equal to 500° C. and less than or equal to 800° C. and a duration greater than or equal to 0.25 hour and less than or equal to 24 hours to produce the colored glass article.

20. The method of claim 19 , wherein the colored glass article has a transmittance color coordinate in the CIELAB color space as measured at an article thickness of 1.33 mm under F2 illumination and a 10° standard observer angle of:
L* greater than or equal to 65 and less than or equal to 98;
a* greater than or equal to −10 and less than or equal to 25; and
b* greater than or equal to −20 and less than or equal to 5.

Assignees

• Corning Inc

Inventors

• Guo Xiaoju
• Hall Jill Marie
• Koch Iii Karl William
• Kohl Jesse
• Smith Liping Xiong
• Wiles Nicole Taylor

Classifications

• C03C4/02

  for coloured glass · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• C03C21/002

  to perform ion-exchange between alkali ions (C03C21/005 takes precedence) · CPC title

• C03C3/093 Primary

  containing zinc or zirconium · CPC title