US 12,415,748 B2
Method for manufacturing a glass-ceramic article
Thibault Guedon, Paris (FR); and Micheline Plichard, Fere en Tardenois (FR)
Assigned to EUROKERA S.N.C., Chateau Thierry (FR)
Appl. No. 17/786,985
Filed by EUROKERA S.N.C., Chateau Thierry (FR)
PCT Filed Nov. 19, 2020, PCT No. PCT/EP2020/082649
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/121846, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 1914890 (FR), filed on Dec. 19, 2019.
Prior Publication US 2023/0041565 A1, Feb. 9, 2023
Int. Cl. C03C 15/00 (2006.01); C03B 32/02 (2006.01); C03C 10/00 (2006.01); C03C 10/12 (2006.01)
CPC C03C 15/00 (2013.01) [C03B 32/02 (2013.01); C03C 10/0027 (2013.01); C03C 2204/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A process for the manufacture of a glass-ceramic article, said process comprising:
a ceramization heat treatment of a glass capable of forming a glass-ceramic, and
a chemical treatment of a surface of said glass before and/or after said ceramization heat treatment to form a textured surface,
the chemical surface treatment being carried out so that, after the ceramization heat treatment, an arithmetic roughness of said textured surface is between 2 μm and 7 μm and the glass-ceramic article exhibits a lightness L* of less than 30,
wherein the glass-ceramic article exhibits a gloss at 60° of between 1.5 GU and 10 GU.