Schott Ag

Susanne Krüger

Andreas Langsdorf

Thomas Pfeiffer

Thomas Seuthe

Jochen Alkemper

Ulrich Lange

Sebastian Leukel

Jörg Hessenkemper

Oliver Hochrein

Rainer Erwin Eichholz

Thomas Schmiady

Rüdiger Dietrich

Peter Naß

Arne Riecke

Julia Weißhuhn

Klaus Megges

Detlef Köpsel

André Petershans

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 SiO, AlO, and LiO and a content of seed formers (ZrO, SnO, and TiO) 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.

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

Chemically toughened glass is provided that has a depth of compressive stress for potassium of at least 4 &#x3bc;m and at most 8 &#x3bc;m; a compressive stress at a depth of 30 &#x3bc;m due to sodium exchange of at most 200 MPa and a minimum amount of at least 90 MPa where the thickness is 0.5 mm, at least 100 MPa where the thickness is 0.55 mm, at least 110 MPa in where the thickness is 0.6 mm, at least 120 MPa where the thickness is 0.7 mm, and at least 140 MPa where the thickness is 1 mm; a ratio of sodium exchange depth, in &#x3bc;m, to the thickness, in mm, that is greater than 0.130; and a normalized integral of tensile stress that is a storable tensile stress of at least 20.6 MPa and at most 30 MPa.

Glass with preferably increased storable tensile stress, chemically toughened glass article with preferably increased storable tensile stress, method for producing such glass, and use thereof

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Mainz, Germany

Susanne Krüger