Title:
無アルカリガラス
Document Type and Number:
Japanese Patent JP6943252
Kind Code:
B2
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,SiO2from 65 to 75,Al2O3from 9 to 15,B2O3from 0 to 3,MgOfrom 0 to 12,CaOfrom 0 to 8,SrOfrom 0 to 6, andBaOfrom 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.
Inventors:
Hirofumi Tokunaga
Kazutaka Ono
Hirose Motoyuki
Kazutaka Ono
Hirose Motoyuki
Application Number:
JP2018535667A
Publication Date:
September 29, 2021
Filing Date:
August 21, 2017
Export Citation:
Assignee:
AGC Inc.
International Classes:
C03C3/087; C03C3/089; C03C3/091
Domestic Patent References:
| JP61236631A | ||||
| JP2015512849A |
Foreign References:
| WO2012077609A1 | ||||
| US20130210962 | ||||
| WO2013099855A1 | ||||
| WO2013172307A1 | ||||
| WO2016063981A1 | ||||
| WO2012043484A1 | ||||
| WO2012108345A1 |
Attorney, Agent or Firm:
Hideaki Ito
Takemoto Yoichi
Hirohisa Hachiya
Takemoto Yoichi
Hirohisa Hachiya