Invention Grant
- Patent Title: Alkali-free glass
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Application No.: US16282363Application Date: 2019-02-22
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Publication No.: US11053160B2Publication Date: 2021-07-06
- Inventor: Hirofumi Tokunaga , Kazutaka Ono , Motoyuki Hirose
- Applicant: AGC Inc.
- Applicant Address: JP Chiyoda-ku
- Assignee: AGC Inc.
- Current Assignee: AGC Inc.
- Current Assignee Address: JP Chiyoda-ku
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JPJP2016-162676 20160823
- Main IPC: C03C3/087
- IPC: C03C3/087 ; C03C3/091 ; C03C3/093
Abstract:
To provide an alkali-free glass, of which the compaction is low, the strain point is high, and the ultraviolet transmittance is high, and which is easy to melt.
An alkali-free glass, which comprises, as represented by mol % based on oxides, SiO2
from 65 to 75, Al2O3
from 9 to 15, B2O3
from 0 to 3, MgO
from 0 to 12, CaO
from 0 to 8, SrO
from 0 to 6, and BaO
from 0 to 5, wherein MgO+CaO+SrO+BaO is from 12 to 22, and 4.84[Fe2O3]+5.65[Na2O]+4.03[K2O]+4.55[SnO2] is at most 0.55, and of which the compaction is at most 80 ppm.
An alkali-free glass, which comprises, as represented by mol % based on oxides, SiO2
from 65 to 75, Al2O3
from 9 to 15, B2O3
from 0 to 3, MgO
from 0 to 12, CaO
from 0 to 8, SrO
from 0 to 6, and BaO
from 0 to 5, wherein MgO+CaO+SrO+BaO is from 12 to 22, and 4.84[Fe2O3]+5.65[Na2O]+4.03[K2O]+4.55[SnO2] is at most 0.55, and of which the compaction is at most 80 ppm.
Public/Granted literature
- US20190185368A1 ALKALI-FREE GLASS Public/Granted day:2019-06-20
Information query
