Schott Ag

Bernd Rüdinger

Friedrich Siebers

Andreas Langsdorf

Wolfgang Schmidbauer

Evelin Weiss

Falk Gabel

Thilo Zachau

Meike Schneider

Otmar Becker

Oliver Hochrein

Doris Moseler

Volker Seibert

Klaus Schneider

Axel Ohlinger

Hans-Werner Beudt

Uwe Martens

Michael Jacquorie

Christian Breitbach

Gerbard Lautenschläger

Markus Heiss

Elena Aksel

A transparent, chemically prestressable or chemically prestressed glass ceramic has a high transmittance, a low haze and a high crystal phase content of keatite solid solution. A method of making such a glass ceramic includes producing a silicate green glass with a melting process and subsequent hot shaping, temperature treating the silicate green glass with at least one nucleation step carried out in the temperature range of 690° C. to 850° C. for a period of 5 min to 72 h and at least one ceramization step carried out in the temperature range of 780° C. to 1100° C. for a period of 3 min to 150 h, and performing at least one ion exchange in an exchange bath at a temperature of the exchange bath between 370° C. and 500° C. for a period of between 2 hours and 50 hours.

Transparent glass ceramic and cover pane

An optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass that can be prestressed and the glass ceramic converted therefrom are described. The glass or the glass ceramic has a composition (in % by weight based on oxide) of essentially SiO55-69, AlO19-25, LiO 3.2-5, NaO 0-1.5, KO 0-1.5, MgO 0-2.2, CaO 0-2.0, SrO 0-2.0, BaO 0-2.5, ZnO 0-&#x3c;1.5, TiO1-3, ZrO1-2.5, SnO0.1-&#x3c;1, &#x3a3;TiO+ZrO+SnO2.5-5, PO0-3, NdO0.01-0.6, CoO 0-0.005, F 0-1, BO0-2.

Optically detectable, floatable arsenic- and antimony-free, glazable lithium-aluminosilicate glass

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Wörrstadt, Germany

Bernd Rüdinger