US 11,718,552 B2
Chemically temperable glass sheet
Thomas Lambricht, Perwez (BE)
Assigned to AGC GLASS EUROPE, Louvain-la-Neuve (BE)
Filed by AGC GLASS EUROPE, Louvain-la-Neuve (BE)
Filed on Nov. 11, 2019, as Appl. No. 16/680,006.
Application 16/680,006 is a continuation of application No. 15/527,459, abandoned, previously published as PCT/EP2015/078309, filed on Dec. 2, 2015.
Claims priority of application No. 14197020 (EP), filed on Dec. 9, 2014; and application No. 15171018 (EP), filed on Jun. 8, 2015.
Prior Publication US 2020/0180998 A1, Jun. 11, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. C03C 3/087 (2006.01); C03C 21/00 (2006.01)
CPC C03C 3/087 (2013.01) [C03C 21/002 (2013.01)] 19 Claims
 
1. A chemically tempered glass sheet comprising the following in weight percentage, expressed with respect to a total weight of glass:
65≤SiO2≤78%;
5≤Na2O≤20%;
1≤K2O<8%;
1≤Al2O3<6%;
2≤CaO<10%;
0≤MgO≤8%;
total iron content expressed as Fe2O3 of from 0.06<Fe2O3≤1.7%, and
a K2O/(K2O+Na2O) ratio which is from 0.1 to 0.7,
wherein the glass sheet is boron, strontium, and lithium free.