Hot-formed, chemically prestressable glass articles with a low proportion of crystals and methods and devices for producing
AssigneeSchott AG
InventorsThomas Schmiady, Thomas Seuthe, Jörg Hessenkemper, Sebastian Leukel, Susanne Krüger
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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.
Claims12
A chemically prestressable, hot-formed, plate-shaped glass article, comprising:
- a thickness that is at least 0.4 mm and at most 2 mm;
- a composition comprising SiO2, Al2O3, and Li2O;
- a content of ZrO2, SnO2, and TiO2 in a sum total of at least 0.8 wt %;
- and
- at most ten crystals or crystallites per kilogram of glass that have a maximum diameter greater than 1 μm and less than or equal to 5 μm.
Dependencies are inferred from the claim text.