Glass compositions with improved chemical and mechanical durability

• US 8,753,994 B2
• Filed: 08/27/2013
• Issued: 06/17/2014
• Est. Priority Date: 10/25/2011
• Status: Active Grant

• Current Assignee: Corning Incorporated
• Original Assignee: Corning Incorporated
• Inventors: Danielson, Paul Stephen, DeMartino, Steven Edward, Drake, Melinda Ann, Morena, Robert Michael, Pal, Santona, Schaut, Robert Anthony
• Primary Examiner(s): Olsen, Kaj K
• Assistant Examiner(s): Bolden, Elizabeth A
• Application Number:
  US14/011,376
• Publication Number:
  US 20130344263A1
• Time in Patent Office: 294 Days
• Field of Search: 501/70, 206/216, 206/438, 206/528, 206/524, 206/524.6, 206/565, 428/34.4, 428/410, 428/426
• US Class Current: 501/70
• CPC Class Codes: A61J 1/00 Containers specially adapted for medical or pharmaceutical purposes capsules or the like for oral use A61J3/07; specially adapted for surgical or diagnostic appliances or instruments A61B50/30; containers for radioactive substances G21F5/00
• CPC Class Codes: C03C 21/002 to perform ion-exchange between alkali ions C03C21/005 takes precedence
• CPC Class Codes: C03C 2204/00 Glasses, glazes or enamels with special properties
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/091 containing aluminium
• CPC Class Codes: C03C 4/18 for ion-sensitive glass
• CPC Class Codes: C03C 4/20 for chemical resistant glass
• CPC Class Codes: Y10T 428/131 Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
• CPC Class Codes: Y10T 428/1317 Multilayer [continuous layer]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/315 Surface modified glass [e.g., tempered, strengthened, etc.]

Abstract

The embodiments described herein relate to chemically and mechanically durable glass compositions and glass articles formed from the same. In another embodiment, a glass composition may include from about 70 mol. % to about 80 mol. % SiO₂; from about 3 mol. % to about 13 mol. % alkaline earth oxide; X mol. % Al₂O₃; and Y mol. % alkali oxide. The alkali oxide may include Na₂O in an amount greater than about 8 mol. %. A ratio of Y:X may be greater than 1 and the glass composition may be free of boron and compounds of boron. In some embodiments, the glass composition may also be free of phosphorous and compounds of phosphorous. Glass articles formed from the glass composition may have at least a class S3 acid resistance according to DIN 12116, at least a class A2 base resistance according to ISO 695, and a type HGA1 hydrolytic resistance according to ISO 720.

Claims

1. A glass container comprising:

SiO₂ in an amount greater than or equal to about 72 mol. % and less than or equal to about 78 mol. %;

X mol. % Al₂O₃, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %;

Y mol. % alkali oxide, wherein the alkali oxide comprises Na₂O in an amount greater than about 8 mol. %; and

MgO and CaO, wherein CaO is present in an amount up to about 1.0 mol. % and a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.5; and

a hydrolytic resistance of at least HGB2 according to ISO 719, wherein a ratio of a concentration of B₂O₃ (mol. %) in the glass container to (Y mol. %−

X mol. %) is less than or equal to 0.3.

2. The glass container of claim 1, wherein a ratio of Y:

X is greater than 1.

3. The glass container of claim 2, wherein a ratio of Y:

X is less than 2.

4. The glass container of claim 1, further comprising from about 4 mol. % to about 8 mol. % alkaline earth oxide.

5. The glass container of claim 1, wherein the container has a hydrolytic resistance of at least HGA2 according to ISO 720.

6. The glass container of claim 1 wherein the glass container is ion-exchange strengthened.

7. The glass container of claim 6 further comprising a compressive stress layer with a depth of layer greater than 10 μ

m.

8. The glass container of claim 6 further comprising a surface compressive stress greater than or equal to 350 MPa.

9. The glass container of claim 1, wherein the glass container is free of boron and compounds of boron.

10. The glass container of claim 1, wherein the glass container is a pharmaceutical package.

11. The glass container of claim 1, wherein the glass container comprises less than or equal to about 13 mol. % Na₂O.

12. The glass container of claim 1, wherein the glass container comprises greater than or equal to about 0.01 mol. % and less than or equal to about 4 mol. % B₂O₃.

13. A glass container comprising:

greater than or equal to about 72 mol. % and less than or equal to about 78 mol. % SiO₂;

greater than or equal to about 4 mol. % and less than or equal to about 8 mol. % alkaline earth oxide, wherein the alkaline earth oxide comprises both MgO and CaO and a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.5;

X mol. % Al₂O₃, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %; and

Y mol. % alkali oxide, wherein the alkali oxide comprises Na₂O in an amount greater than or equal to about 8 mol. %, wherein;

the glass container has a threshold diffusivity of greater than 16 μ

m²/hr at a temperature less than or equal to 450°

C., and a ratio of a concentration of B₂O₃ (mol. %) in the glass container to (Y mol. %−

X mol. %) is less than or equal to 0.3.

14. The glass container of claim 13 further comprising greater than or equal to about 0.01 mol. % and less than or equal to about 4 mol. % B₂O₃.

15. The glass container of claim 13, wherein the glass container is free from boron and compounds of boron.

16. The glass container of claim 13, wherein the glass container has a compressive stress layer with a depth of layer greater than 10 μ

m.

17. The glass container of claim 13, wherein the glass container has a surface compressive stress greater than or equal to 250 MPa.

18. The glass container of claim 13, wherein the threshold diffusivity is greater than 20 μ

m²/hr at a temperature less than or equal to 450°

C.

19. The glass container of claim 13, wherein the glass container has a hydrolytic resistance of at least HGA2 according to ISO 720.

20. The glass container of claim 13, wherein the glass container is a pharmaceutical package.

21. A glass container comprising:

greater than or equal to about 72 mol. % and less than or equal to about 78 mol. % SiO₂;

alkaline earth oxide comprising both CaO and MgO, wherein CaO is present in an amount up to about 1.0 mol. %, and a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.5;

X mol. % Al₂O₃, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %; and

Y mol. % alkali oxide, the alkali oxide comprising from about 0.01 mol. % to about 1.0 mol. % K₂O, wherein a ratio of a concentration of B₂O₃ (mol. %) in the glass container to (Y mol. %−

X mol. %) is less than or equal to 0.3 and the glass container is a pharmaceutical package.

22. The glass container of claim 21, wherein the glass container has a compressive stress layer with a depth of layer greater than 10 μ

m.

23. The glass container of claim 21, wherein the glass container has a surface compressive stress greater than or equal to 250 MPa.

24. The glass container of claim 21, wherein the glass container has a hydrolytic resistance of at least HGA2 according to ISO 720.

25. The glass container of claim 21, wherein a ratio of Y:

X is greater than or equal to 0.9 and less than 2.

26. The glass container of claim 21, wherein the glass container has a threshold diffusivity of greater than 16 μ

m²/hr at a temperature less than or equal to 450°

C.

27. The glass container of claim 21, wherein the glass container is free of boron and compounds of boron.

28. The glass container of claim 21, wherein the glass container has a hydrolytic resistance of at least HGB2 according to ISO 719.

29. The glass container of claim 21, wherein the glass container has at least a class S3 acid resistance according to DIN 12116.

30. The glass container of claim 21, wherein the glass container has at least a class A2 base resistance according to ISO 695.