Invention Grant
- Patent Title: Glass composition, glass composition for chemical strengthening, strengthened glass article, and cover glass for display
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Application No.: US14777683Application Date: 2014-03-13
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Publication No.: US09764980B2Publication Date: 2017-09-19
- Inventor: Yutaka Senshu , Junji Kurachi
- Applicant: Nippon Sheet Glass Company, Limited
- Applicant Address: JP Tokyo
- Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
- Current Assignee: NIPPON SHEET GLASS COMPANY, LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JP2013-060489 20130322
- International Application: PCT/JP2014/001442 WO 20140313
- International Announcement: WO2014/148020 WO 20140925
- Main IPC: C03C3/087
- IPC: C03C3/087 ; C03C21/00
Abstract:
A glass composition of the present invention includes, in mol %, 66 to 72% SiO2, 1 to 4% Al2O3, 8 to 15% MgO, 1 to 8% CaO, 12 to 16% Na2O, and 0 to 1% K2O. A total content of MgO and CaO is in a range of 12 to 17%, and a molar ratio of CaO to the total content of MgO and CaO is in a range of 0.1 to 0.4. The glass composition of the present invention is suitable for production by the float process, and is suitable for chemical strengthening.
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