Glass compositions with improved chemical and mechanical durability
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C03C-003/087
C03C-003/078
출원번호
US-0660394
(2012-10-25)
등록번호
US-8551898
(2013-10-08)
발명자
/ 주소
Danielson, Paul Steven
DeMartino, Steven Edward
Drake, Melinda Ann
Morena, Robert Michael
Pal, Santona
Schaut, Robert Anthony
출원인 / 주소
Corning Incorporated
대리인 / 주소
Dinsmore & Shohl LLP
인용정보
피인용 횟수 :
28인용 특허 :
15
초록▼
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;
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.
대표청구항▼
1. A glass composition comprising: SiO2 in a concentration greater than about 74 mol. %;alkaline earth oxide comprising MgO and CaO, wherein CaO is present in an amount greater than or equal to about 0.1 mol. % and less than or equal to about 1.0 mol. %, and a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (
1. A glass composition comprising: SiO2 in a concentration greater than about 74 mol. %;alkaline earth oxide comprising MgO and CaO, wherein CaO is present in an amount greater than or equal to about 0.1 mol. % and less than or equal to about 1.0 mol. %, and a ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.5; andY mol. % alkali oxide, wherein the alkali oxide comprises Na2O in an amount greater than about 8 mol. %, wherein the glass composition is free of boron and compounds of boron. 2. The glass composition of claim 1 wherein the concentration of SiO2 is less than or equal to about 80 mol. %. 3. The glass composition of claim 1, wherein the glass composition is free from phosphorous and compounds of phosphorous. 4. The glass composition of claim 1, wherein the alkaline earth oxide is present in an amount from about 3 mol. % to about 13 mol. %. 5. The glass composition of claim 1, wherein the ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.3. 6. The glass composition of claim 1, further comprising SnO2. 7. The glass composition of claim 1 further comprising X mol. % Al2O3, wherein a ratio of Y:X is greater than 1. 8. The glass composition of claim 7, wherein the ratio of Y:X is less than or equal to 2. 9. The glass composition of claim 7, wherein X is greater than or equal to about 2 mol. % and less than or equal to about 10 mol. %. 10. The glass composition of claim 7, wherein the ratio of Y:X is greater than or equal 1.3 and less than or equal to 2. 11. The glass composition of claim 7, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %. 12. A glass composition comprising: from about 74 mol. % to about 78 mol. % SiO2;from about 4 mol. % to about 8 mol. % alkaline earth oxide, wherein the alkaline earth oxide comprises both MgO and CaO, CaO is present in an amount greater than or equal to about 0.1 mol. % and less than or equal 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 2 mol. % and less than or equal to about 10 mol. %; andY mol. % alkali oxide, wherein the alkali oxide comprises Na2O in an amount greater than or equal to about 9 mol. % and less than or equal to about 15 mol. %, a ratio of Y:X is greater than 1, and the glass composition is free of boron and compounds of boron. 13. The glass composition of claim 12, wherein the ratio of Y:X is less than or equal to about 2. 14. The glass composition of claim 12, wherein the ratio of Y:X is greater than or equal to about 1.3 and less than or equal to about 2.0. 15. The glass composition of claim 12, wherein the ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.1. 16. The glass composition of claim 12, wherein the alkaline earth oxide comprises from about 3 mol. % to about 7 mol. % MgO. 17. The glass composition of claim 12, wherein the alkali oxide comprises K2O in an amount greater than or equal to about 0.01 mol. % and less than or equal to about 1.0 mol. %. 18. The glass composition of claim 12, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %. 19. A glass composition comprising: from about 74 mol. % to about 78 mol. % SiO2;alkaline earth oxide comprising both CaO and MgO, wherein the alkaline earth oxide comprises CaO in an amount greater than or equal to about 0.1 mol. % and less than or equal 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 2 mol. % and less than or equal to about 10 mol. %; andY mol. % alkali oxide, wherein the alkali oxide comprises from about 0.01 mol. % to about 1.0 mol. % K2O and a ratio of Y:X is greater than 1, and the glass composition is free of boron and compounds of boron. 20. The glass composition of claim 19, wherein the ratio of Y:X is less than or equal to 2. 21. The glass composition of claim 19, wherein the ratio of Y:X is greater than or equal to 1.3 and less than or equal to 2.0. 22. The glass composition of claim 19, wherein the ratio (CaO (mol. %)/(CaO (mol. %)+MgO (mol. %))) is less than or equal to 0.1. 23. The glass composition of claim 19, wherein the glass composition is free of phosphorous and compounds of phosphorous. 24. The glass composition of claim 19, wherein the alkali oxide further comprises Na2O in an amount greater than about 8 mol. %. 25. The glass composition of claim 19, wherein the alkali oxide comprises Na2O in an amount greater than or equal to about 2 mol. % and less than or equal to about 15 mol. %. 26. The glass composition of claim 19, wherein the alkali oxide comprises from about 9 mol. % to about 13 mol. % Na2O. 27. The glass composition of claim 19, wherein X is greater than or equal to about 5 mol. % and less than or equal to about 7 mol. %. 28. A glass composition comprising: from about 74 mol. % to about 78 mol. % SiO2;from about 4 mol. % to about 8 mol. % alkaline earth oxide, wherein the alkaline earth oxide comprises CaO in an amount greater than or equal to about 0.1 mol. % and less than or equal to about 1.0 mol. %, MgO, 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 4 mol. % and less than or equal to about 8 mol. %; andY mol. % alkali oxide, wherein the alkali oxide comprises Na2O in an amount greater than or equal to about 9 mol. % and less than or equal to about 15 mol. %, a ratio of Y:X is greater than 1, and the glass composition is free of boron and compounds of boron, wherein the glass composition has a type HGA1 hydrolytic resistance according to ISO 720. 29. The glass composition of claim 28, wherein the glass composition has a threshold diffusivity greater than about 16 μm2/hr at a temperature less than or equal to 450° C.
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