IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0015495
(2013-08-30)
|
등록번호 |
US-9242890
(2016-01-26)
|
우선권정보 |
JP-2009-284809 (2009-12-16) |
발명자
/ 주소 |
- Koyama, Akihiro
- Hashimoto, Mikiko
|
출원인 / 주소 |
|
대리인 / 주소 |
Hamre, Schumann, Mueller & Larson, P.C.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
Provided is a glass composition suitable for a glass substrate for a flat panel display such as a liquid crystal display. This glass composition has high thermal stability, and is substantially free of BaO but has a low devitrification temperature. It is suitable for the production of a glass substr
Provided is a glass composition suitable for a glass substrate for a flat panel display such as a liquid crystal display. This glass composition has high thermal stability, and is substantially free of BaO but has a low devitrification temperature. It is suitable for the production of a glass substrate by a downdraw process. This glass composition contains, in terms of mass %: 54 to 62% of SiO2; 4 to 11% of B2O3; 15 to 20% of Al2O3; 2 to 5% of MgO; 0 to 7% of CaO; 0 to 13.5% of SrO; 0 to 1% of K2O; 0 to 1% of SnO2; and 0 to 0.2% of Fe2O3, and is substantially free of BaO. In this glass composition, the total content of alkaline earth metal oxides (MgO+CaO +SrO) is 10 to 18.5 mass %. The devitrification temperature of the glass composition is 1200° C. or lower.
대표청구항
▼
1. A glass composition comprising, in terms of mass %: 54 to 62% of SiO2;4 to 11% of B2O3;15 to 20% of Al2O3;2 to 5% of MgO;0 to 4.255% of CaO;0 to 13.5% of SrO;0 to 1% of K2O;0.1 to 1% of SnO2; and0.05 to 0.2% of Fe2O3, whereinthe glass composition is substantially free of BaO,a total content of al
1. A glass composition comprising, in terms of mass %: 54 to 62% of SiO2;4 to 11% of B2O3;15 to 20% of Al2O3;2 to 5% of MgO;0 to 4.255% of CaO;0 to 13.5% of SrO;0 to 1% of K2O;0.1 to 1% of SnO2; and0.05 to 0.2% of Fe2O3, whereinthe glass composition is substantially free of BaO,a total content of alkaline earth metal oxides (MgO+CaO+SrO) is 10 to 18.5 mass %,a mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.23 or lower, anda devitrification temperature of the glass composition is 1200° C. or lower. 2. The glass composition according to claim 1, wherein the mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.05 to 0.23. 3. The glass composition according to claim 1, wherein a glass transition point of the glass composition is 720° C. or higher. 4. The glass composition of claim 1, wherein the content of SrO is 5% or more. 5. A glass substrate for a flat panel display, the substrate being composed of the glass composition according to claim 1. 6. A flat panel display comprising the glass substrate for a flat panel display according to claim 5. 7. A glass composition comprising, in terms of mass %: 54 to 62% of SiO2;4 to 11% of B2O3;15 to 20% of Al2O3;2 to 5% of MgO;0 to 4.255% of CaO;0 to 13.5% of SrO;0 to 1% of K2O;0 to 1% of SnO2; and0 to 0.2% of Fe2O3, whereinthe glass composition is substantially free of BaO,a total content of alkaline earth metal oxides (MgO+CaO+SrO) is 10 to 18.5 mass %,a mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.23 or lowera mass ratio of the content of MgO to the total content of the alkaline earth metal oxides is 0.2 to 0.3, anda devitrification temperature of the glass composition is 1200° C. or lower. 8. The glass composition according to claim 7, wherein the mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.05 to 0.23. 9. The glass composition according to claim 7, wherein a glass transition point of the glass composition is 720° C. or higher. 10. The glass composition of claim 7, wherein the content of SrO is 5% or more. 11. A glass substrate for a flat panel display, the substrate being composed of the glass composition according to claim 7. 12. A flat panel display comprising the glass substrate for a flat panel display according to claim 11. 13. A glass composition comprising, in terms of mass %: 54 to 62% of SiO2;4 to 11% of B2O3;15 to 20% of Al2O3;2 to 5% of MgO;0 to 4.255% of CaO;0 to 13.5% of SrO;0 to 1% of K2O;0 to 1% of SnO2; and0 to 0.2% of Fe2O3, whereinthe glass composition is substantially free of BaO,a total content of alkaline earth metal oxides (MgO+CaO+SrO) is 10 to 18.5 mass %,a mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.23 or lower, anda devitrification temperature of the glass composition is 1200° C. or lower. 14. The glass composition according to claim 13, wherein the mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.05 to 0.23. 15. The glass composition according to claim 13, wherein a glass transition point of the glass composition is 720° C. or higher. 16. The glass composition of claim 13, wherein the content of SrO is 5% or more. 17. A glass substrate for a flat panel display, the substrate being composed of the glass composition according to claim 13. 18. A flat panel display comprising the glass substrate for a flat panel display according to claim 17. 19. A glass composition comprising, in terms of mass %: 54 to 62% of SiO2;4 to 11% of B2O3;15 to 20% of Al2O3;2 to 5% of MgO;0 to 4.255% of CaO;0 to 13.5% of SrO;0.1 to 1% of K2O;0 to 1% of SnO2; and0 to 0.2% of Fe2O3, whereinthe glass composition is substantially free of BaO,a total content of alkaline earth metal oxides (MgO+CaO+SrO) is 10 to 18.5 mass %,a mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.23 or lower, anda devitrification temperature of the glass composition is 1200° C. or lower. 20. The glass composition according to claim 19, wherein the mass ratio of the content of CaO to the total content of the alkaline earth metal oxides is 0.05 to 0.23. 21. The glass composition according to claim 19, wherein a glass transition point of the glass composition is 720° C. or higher. 22. The glass composition of claim 19, wherein the content of SrO is 5% or more. 23. A glass substrate for a flat panel display, the substrate being composed of the glass composition according to claim 19. 24. A flat panel display comprising the glass substrate for a flat panel display according to claim 23.
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