Hot-formed, chemically prestressable glass articles with a low proportion of crystals and methods and devices for producing

US11987523B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Thomas Schmiady · Jena, DE
• Thomas Seuthe · Jena, DE
• Jörg Hessenkemper · Jena, DE
• Sebastian Leukel · Mainz, DE
• Susanne Krüger · Mainz, DE

Key dates

• Filing date: Nov 30, 2023
• Grant date: May 21, 2024
• Expiry date: Nov 30, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C21/002
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A hot-formed, chemically prestressable glass article having a low percentage of crystals or crystallites, in particular a plate-shaped, chemically prestressable glass article, as well as to a method and a device for its production are provided. The glass article has a composition including the components SiO2, Al2O3, and Li2O and a content of seed formers (ZrO2, SnO2, and TiO2) of at least 0.8 wt %, as well as at most ten crystals, including crystallites, per kilogram of glass, which have a maximum diameter greater than 1 μm and up to at most 5 μm.