High strength glass-ceramics having petalite and lithium silicate structures

Patent metadata

Field	Value
Publication number	US-11319244-B2
Application number	US-202017119030-A
Country	US
Kind code	B2
Filing date	Dec 11, 2020
Priority date	Oct 8, 2014
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

In embodiments, a glass-ceramic article includes from about 55 wt. % to about 80 wt. % SiO2; from about 2 wt. % to about 20 wt. % Al2O3; from about 5 wt. % to about 20 wt. % Li2O; a non-zero amount of P2O5 less than or equal to 6 wt. %; and from about 3 wt. % to less than 8 wt. % ZrO2. The glass-ceramic grains having a longest dimension of less than 100 nm.

First claim

The invention claimed is:

1. A glass-ceramic article comprising:
from about 55 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 20 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 20 wt. % Li 2 O;
from about 2 wt. % to about 4 wt. % P 2 O 5 ; and
from about 0.2 wt. % to about 15 wt. % ZrO 2 , wherein:
the glass-ceramic article consists of grains having a longest dimension of less than 100 nm;
the glass-ceramic article comprises 5 wt. % to 30 wt. % residual glass; and
the glass-ceramic comprises an average transmittance of greater than or equal to 90% over a wavelength range from about 400 nm to about 700 nm at an article thickness of 1 mm.

2. The glass-ceramic article of claim 1 comprising a thickness of from about 0.8 mm to about 10 mm.

3. The glass-ceramic article of claim 1 comprising a phase assemblage comprising:
from about 35 wt. % to about 45 wt. % petalite; and
from about 40 wt. % to about 50 wt. % lithium disilicate.

4. The glass-ceramic article of claim 1 comprising a non-ion-exchanged Vickers hardness from about 600 to about 900 kgf/mm 2 .

5. The glass-ceramic article of claim 1 comprising a fracture toughness greater than or equal to 1.0 MPa·m 1/2 .

6. The glass-ceramic article of claim 1 comprising:
from about 70 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 18 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 16 wt. % Li 2 O;
from about 0.5 wt. % to about 8 wt. % ZrO 2 ; and
from about 2 wt. % to about 3.5 wt. % P 2 O 5 .

7. A glass-ceramic article comprising:
from about 55 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 20 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 20 wt. % Li 2 O;
a non-zero amount of P 2 O 5 less than or equal to 4 wt. %; and
ZrO 2 , wherein:
ZrO 2 (wt. %)+P 2 O 5 (wt. %) is greater than 5;
the glass-ceramic article consists of grains having a longest dimension of less than 100 nm;
the glass-ceramic article comprises 5 wt. % to 30 wt. % residual glass; and
the glass-ceramic comprises an average transmittance of greater than or equal to 90% over a wavelength range from about 400 nm to about 700 nm at an article thickness of 1 mm.

8. The glass-ceramic article of claim 7 comprising a thickness of from about 0.8 mm to about 10 mm.

9. The glass-ceramic article of claim 7 has a phase assemblage comprising:
from about 35 wt. % to about 45 wt. % petalite;
from about 40 wt. % to about 50 wt. % lithium disilicate; and
from 5 wt. % to about 20 wt. % residual glass.

10. The glass-ceramic article of claim 7 comprising a non-ion-exchanged Vickers hardness from about 600 to about 900 kgf/mm 2 .

11. The glass-ceramic article of claim 7 comprising a fracture toughness greater than or equal to 1.0 MPa·m 1/2 .

12. The glass-ceramic article of claim 7 comprising:
from about 70 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 18 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 16 wt. % Li 2 O;
from about 0.5 wt. % to about 8 wt. % ZrO 2 ; and
from about 1 wt. % to about 4 wt. % P 2 O 5 .

13. A glass-ceramic article comprising:
from about 55 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 20 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 20 wt. % Li 2 O;
0 wt. % to about 1 wt. % of Na 2 O+K 2 O;
a non-zero amount of P 2 O 5 less than or equal to 4 wt. %; and
from about 0.2 wt. % to about 15 wt. % ZrO 2 , wherein:
the glass-ceramic article consists of grains having a longest dimension of less than 100 nm;
the glass-ceramic article comprises 5 wt. % to 30 wt. % residual glass; and
the glass-ceramic comprises an average transmittance of greater than or equal to 90% over a wavelength range from about 400 nm to about 700 nm at an article thickness of 1 mm.

14. The glass-ceramic article of claim 13 comprising a thickness of from about 0.8 mm to about 10 mm.

15. The glass-ceramic article of claim 13 has a phase assemblage comprising:
from about 35 wt. % to about 45 wt. % petalite;
from about 40 wt. % to about 50 wt. % lithium disilicate; and
from 5 wt. % to about 20 wt. % residual glass.

16. The glass-ceramic article of claim 13 comprising a non-ion-exchanged Vickers hardness from about 600 to about 900 kgf/mm 2 .

17. The glass-ceramic article of claim 13 comprising a fracture toughness greater than or equal to 1.0 MPa·m 1/2 .

18. The glass-ceramic article of claim 13 comprising from about 0.5 wt. % to about 8 wt. % ZrO 2 .

19. A glass-ceramic article comprising:
from about 55 wt. % to about 80 wt. % SiO 2 ;
6 wt. % to about 20 wt. % Al 2 O 3 ;
greater than 10 wt. % to about 20 wt. % Li 2 O;
a non-zero amount of P 2 O 5 less than or equal to 6 wt. %; and
from about 3 wt. % to less than 8 wt. % ZrO 2 , wherein:
the glass-ceramic article consists of grains having a longest dimension of less than 100 nm;
the glass-ceramic article comprises 5 wt. % to 30 wt. % residual glass; and
the glass-ceramic comprises an average transmittance of greater than or equal to 90% over a wavelength range from about 400 nm to about 700 nm at an article thickness of 1 mm.

20. The glass-ceramic article of claim 19 comprising a thickness of from about 0.8 mm to about 10 mm.

21. The glass-ceramic article of claim 19 has a phase assemblage comprising:
from about 35 wt. % to about 45 wt. % petalite;
from about 40 wt. % to about 50 wt. % lithium disilicate; and
from 5 wt. % to about 20 wt. % residual glass.

22. The glass-ceramic article of claim 19 comprising a non-ion-exchanged Vickers hardness from about 600 to about 900 kgf/mm 2 .

23. The glass-ceramic article of claim 19 comprising a fracture toughness greater than or equal to 1.0 MPa·m 1/2 .

24. The glass-ceramic article of claim 19 comprising from about 4 wt. % to about 8 wt. % ZrO 2 .

25. The glass-ceramic article of claim 19 comprising from about 1 wt. % to about 4 wt. % P 2 O 5 .

Assignees

• Corning Inc

Inventors

• Beall George Halsey
• Fu Qiang
• Smith Charlene Marie

Classifications

• C03C10/0027 Primary

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

• C03C2204/00

  Glasses, glazes or enamels with special properties · CPC title

• C03C10/0054

  containing PbO, SnO2, B2O3 · CPC title

• C03C3/097

  containing phosphorus, niobium or tantalum · CPC title

• C03C4/0092

  for glass with improved high visible transmittance, e.g. extra-clear glass · CPC title