Invention Grant
- Patent Title: Alkali-free glass
- Patent Title (中): 无碱玻璃
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Application No.: US13817196Application Date: 2011-08-10
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Publication No.: US09023744B2Publication Date: 2015-05-05
- Inventor: Takahiro Kawaguchi , Shinkichi Miwa
- Applicant: Takahiro Kawaguchi , Shinkichi Miwa
- Applicant Address: JP Shiga
- Assignee: Nippon Electric Glass Co., Ltd.
- Current Assignee: Nippon Electric Glass Co., Ltd.
- Current Assignee Address: JP Shiga
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2010-182068 20100817
- International Application: PCT/JP2011/068252 WO 20110810
- International Announcement: WO2012/023470 WO 20120223
- Main IPC: C03C3/087
- IPC: C03C3/087 ; C03C3/091 ; H01L51/00 ; H01L51/52

Abstract:
Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10−7/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO2, 10 to 20% of Al2O3, 0.1 to 4.5% of B2O3, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.
Public/Granted literature
- US20130244859A1 ALKALI-FREE GLASS Public/Granted day:2013-09-19
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