Glass ceramic article, method for producing same, and use thereof

US12351501B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Falk Gabel · Schlangenbad, DE
• Roland Dudek · Bad Kreuznach, DE
• Evelin Weiss · Mainz, DE

Key dates

• Filing date: Jun 30, 2021
• Grant date: Jul 8, 2025
• Expiry date: Mar 22, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2204/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Sheet-like glass ceramic article are provided that include surfaces with a thickness between the surfaces between 0.5 mm and 1.9 mm and a core. The articles have a first microstructure provided on each of the surfaces and have a second microstructure in the core with a second thickness (d2). The first microstructures extend inwardly from the surfaces towards the core and has a first thickness (d1). The first microstructure has a difference from the second microstructure selected from a group consisting of: a crystalline phase type, a crystalline phase amount, crystalline phase size distribution, crystalline phase orientation, crystalline phases composition, crystalline inclusion, an amorphous phase type, an amorphous phase percentage amount, an amorphous phase composition, and any combinations thereof. The difference results in a first coefficient of linear thermal expansion of the first microstructure that is smaller than a second coefficient of linear thermal expansion of the second microstructure.