	US 12,304,859 B2
	Copper aluminoborosilicate glass and uses thereof
Philippe Lehuede, Dammarie-les-Lys (FR); and Marie Comte, Fontenay aux Roses (FR)
Assigned to CORNING INCORPORATED, Corning, NY (US)
Appl. No. 17/414,183
Filed by Eurokera, Jouarre (FR)
PCT Filed Dec. 17, 2019, PCT No. PCT/EP2019/085579 § 371(c)(1), (2) Date Jun. 15, 2021, PCT Pub. No. WO2020/127213, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1873528 (FR), filed on Dec. 20, 2018.
Prior Publication US 2022/0041492 A1, Feb. 10, 2022
Int. Cl. C03C 3/093 (2006.01); C03C 3/097 (2006.01)

CPC C03C 3/097 (2013.01)

16 Claims

1. An aluminoborosilicate glass of composition, expressed as percentages by weight of oxides, containing:

60% to 70% of SiO₂,

13% to 20% of Al₂O₃,

1% to 9% of B₂O₃,

0 to 3% of P₂O₅,

0.5% to 4% of MgO,

1% to 4% of BaO,

0 to 3% of CaO,

0 to 3% of SrO,

2% to 10% of ZnO,

0 to 2% of Li₂O,

0 to 2% of Na₂O,

0 to 2% of K₂O,

0.1% to 3% of CuO,

0 to 1% of at least one fining agent;

and

0 to 2% of at least one coloring agent other than CuO,

with:

MgO+BaO+CaO+SrO≤6%,

0.2%≤Li₂O+Na₂O+K₂O≤2%, and

B₂O₃+MgO+Li₂O—(BaO+CaO+SrO+CuO)<6.4%.