Ion exchangeable Li-containing glass compositions for 3-D forming

Patent metadata

Field	Value
Publication number	US-10183887-B2
Application number	US-201715718391-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Jul 17, 2012
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

According to one embodiment, a glass article may include SiO2, Al2O3, Li2O and Na2O. The glass article may have a softening point less than or equal to about 810° C. The glass article may also have a high temperature CTE less than or equal to about 27×10−6/° C. The glass article may also be ion exchangeable such that the glass has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 μm after ion exchange in a salt bath comprising KNO3 at a temperature in a range from about 390° C. to about 450° C. for less than or equal to approximately 15 hours.

First claim

What is claimed is:

1. A glass article comprising:
greater than or equal to 67 mol. % to about 71 mol. % SiO 2 ;
from about 7 mol. % to about 12 mol. % Al 2 O 3 ;
from about 1 mol. % to about 9 mol. % Li 2 O;
less than about 16 mol. % Na 2 O;
greater than 0 mol. % to about 5 mol. % K 2 O; and
from about 0.8 mol. % to about 10 mol. % of a divalent oxide, wherein the divalent oxide comprises greater than 0 mol. % to about 1 mol. % CaO and at least one of MgO and ZnO.

2. The glass article of claim 1 further comprising from about 0.5 mol. % to about 2 mol% ZrO 2 .

3. The glass article of claim 1 , wherein a concentration of K 2 O is less than or equal to about 3.0 mol. %.

4. The glass article of claim 1 , wherein a concentration of CaO is less than or equal to about 0.5 mol. %.

5. The glass article of claim 1 , wherein the concentration of B 2 O 3 is less than or equal to 1.0 mol. %.

6. The glass article of claim 1 , wherein the glass article is substantially free of B 2 O 3 .

7. The glass article of claim 1 , wherein a sum of a concentration of Al 2 O 3 (mol. %), and a concentration of the divalent oxide (mol. %) is greater than about 10 mol%.

8. The glass article of claim 1 , wherein a concentration of SiO 2 is greater than or equal to 6 mol. %.

9. The glass article of claim 1 , wherein the glass article is ion exchange strengthened.

10. The glass article of claim 9 , wherein the glass article has a compressive stress greater than or equal to about 650 MPa and a depth of layer greater than or equal to about 25 μm.

11. A glass article comprising:
greater than or equal to 67 mol. % to about 71 mol. % SiO 2 ;
from about 7 mol. % to about 12 mol. % Al 2 O 3 ;
from about 1 mol. % to about 9mol. % Li 2 O;
less than about 16 mol. % Na 2 O;
greater than 0 mol. % to about 5 mol. % K 2 O;
less than 1.0 mol. % B 2 O 3 .
from about 0.8 mol. % to about 10 mol. % of a divalent oxide, wherein the divalent oxide comprises greater than 0 mol. % to about 1 mol. % CaO and at least one of MgO and ZnO; and
from about 0.5 mol. % to about 2 mol. % ZrO 2 .

12. The glass article of claim 11 , wherein a concentration of K 2 O is less than or equal to about 3.0 mol. %.

13. The glass article of claim 11 , wherein a concentration of CaO is less than or equal to about 0.5 mol. %.

14. The glass article of claim 11 , wherein a sum of a concentration of Al 2 O 3 (mol. %), and a concentration of the divalent oxide (mol. %) is greater than about 10 mol%.

15. The glass article of claim 11 , wherein a concentration of SiO 2 is greater than or equal to 68 mol. %.

16. The glass article of claim 11 , wherein the glass article is ion exchange strengthened.

17. The glass article of claim 16 , wherein the glass article has a compressive stress greater than or equal to about 600 MPa and a depth of layer greater than or equal to about 25 μm.

18. The glass article of claim 17 , wherein the depth of layer is greater than or equal to about 35 μm.

19. The glass article of claim 17 , wherein the depth of layer is greater than or equal to about 650 MPa.

Assignees

• Corning Inc

Inventors

• Comte Marie Jacqueline Monique
• Drake Melinda Ann
• Geisinger Karen Leslie
• Gomez Sinue
• Morena Robert Michael
• Smith Charlene Marie
• Youngman Randall Eugene

Classifications

• Y10T428/315

  Surface modified glass [e.g., tempered, strengthened, etc.] · CPC title

• C03C3/093

  containing zinc or zirconium · CPC title

• C03C3/087

  containing calcium oxide, e.g. common sheet or container glass · CPC title

• C03C4/18

  for ion-sensitive glass · CPC title

• C03C3/097 Primary

  containing phosphorus, niobium or tantalum · CPC title