Invention Grant
- Patent Title: Alkali-free glass
- Patent Title (中): 无碱玻璃
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Application No.: US13255343Application Date: 2010-03-19
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Publication No.: US08835335B2Publication Date: 2014-09-16
- Inventor: Takashi Murata , Shinkichi Miwa
- Applicant: Takashi Murata , 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: JP2009-067142 20090319
- International Application: PCT/JP2010/054790 WO 20100319
- International Announcement: WO2010/107111 WO 20100923
- Main IPC: C03C3/091
- IPC: C03C3/091 ; C03C3/093
Abstract:
An alkali-free glass of the present invention comprises, as a glass composition expressed in terms of oxides by mass %, 45 to 70% of SiO2, 10 to 30% of Al2O3, 11 to 20% of B2O3, less than 0.1% of As2O3, less than 0.1% of Sb2O3, and less than 0.1% of an alkali metal oxide, and has a thermal expansion coefficient (30 to 380° C.) of 30 to 35×10−7/° C.
Public/Granted literature
- US20110318561A1 ALKALI-FREE GLASS Public/Granted day:2011-12-29
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