公开(公告)号：US10392293B2

公开(公告)日：2019-08-27

申请号：US15933707

申请日：2018-03-23

Applicant: AGC Inc.

Inventor： Yusaku Matsuo ,  Yutaka Kuroiwa ,  Yusuke Arai ,  Hiroyuki Hijiya ,  Yuki Kondo

IPC: C03C3/087 ,  C03C3/085 ,  C03C3/091 ,  C03C4/00

Abstract: The present invention provides a high-transparency glass having a high fining action at a low temperature and capable of achieving redox lowering more than before. The present invention relates to a glass containing 1 to 500 ppm of a total iron oxide (t-Fe2O3) in terms of Fe2O3, having a redox ([divalent iron (Fe2+) in terms of Fe2O3]/[total (Fe2++Fe3+) of divalent iron (Fe2+) and trivalent iron (Fe3+) in terms of Fe2O3]) of 0% or more and 25% or less, containing, as expressed by mass percentage based on oxides, 50 to 81% of SiO2, 1 to 20% of Al2O3, 0 to 5% of B2O3, 5 to 20% of Li2O+Na2O+K2O, and 5 to 27% of MgO+CaO+SrO+BaO, and having a bubble disappearance-starting temperature (TD) of 1485° C. or lower.