Schott Ag

Klaus Schönberger

Friedrich Siebers

Frank-Thomas Lentes

Wolfgang Schmidbauer

Ulrich Schiffner

Erich Rodek

Evelin Weiss

Matthias Bockmeyer

Falk Gabel

Karin Naumann

Michael Bug

Thomas Zenker

Otmar Becker

Oliver Hochrein

Bernd Ruedinger

Gerhard Hahn

Ioannis Kosmas

Martin Spier

Uwe Martens

Petra Grewer

Fritz Schroeder

Andreas Schminke

Matthias Stubenrauch

Horst Blei

Reiner Best

Udo Jakob

Rainer Best

Johannes Stinner

Christian Müller

Eckhart Döring

A description is given of a coloured, transparent, lithium aluminium silicate glass-ceramic and also of the use thereof, said glass-ceramic possessing a light transmission Y of 2.5% to 10% and a spectral transmission τof more than 1.0%.

Coloured transparent lithium aluminium silicate glass-ceramic and use thereof

Transparent, dyed cook top or hob with improved color display capability, consisting of a glass ceramic with high quartz mixed crystals as predominant crystal phase, whereby the glass-ceramic contains none of the chemical refining agents arsenic oxide and/or antimony, with transmission values of greater than 0.1% in the range of the visible light within the entire wavelength range greater than 450 nm, a light transmission in the visible of 0.8-2.5% and a transmission in the infrared at 1600 nm of 45-85%.

Transparent, dyed cooktop having improved color display capability, and method for producing such a cooktop

A lithium-aluminosilicate glass or a corresponding glass ceramic that has a content of 0-0.4SnO, 1.3-2.7% by weight of &#x3a3;SnO+TiO, 1.3-2.5% by weight of ZrO, 3.65-4.3% by weight of &#x3a3;ZrO+0.87 (TiO+SnO), &#x2266;0.04% by weight of FeO, 50-4000 ppm of NdOand 0-50 ppm of CoO is described. The glass or the glass ceramic is color-neutral, has a turbidity of less than 1% HAZE and a high light transmission. The glazing time for conversion of the glass into glass ceramic is especially short with less than 2.5 hours.

Lithium-aluminosilicate glass with short glazing times

A transparent, colorless lithium-aluminosilicate glass ceramic plate with high-quartz mixed crystals as the prevailing crystal phase, which is provided on one side with an opaque, colored, temperature-stable coating over the entire surface or over the entire surface to a large extent, is described, which has a content of NdOof 40 to 4000 ppm, a Yellowness Index of less than 10% with a 4 mm glass (ceramic) layer thickness, and a variegation of colors of the glass or the glass ceramic in the CIELAB color system of C* of less than 5. The glass ceramic plate preferably has a composition (in % by weight based on oxide) of: LiO 3.0-4.5, NaO 0-1.5, KO 0-1.5, &#x3a3;NaO+KO 0.2-2.0, MgO 0-2.0, CaO 0-1.5, SrO 0-1.5, BaO 0-2.5, ZnO 0-2.5, BO0-1.0, AlO19-25, SiO55-69, TiO1-3, ZrO1-2.5, SnO0-0.4, &#x3a3;SnO+TiO&#x3c;3, PO0-3.0, NdO0.01-0.4, CoO 0.0-0.004.

Transparent glass ceramic plate that has an opaque, colored bottom coating over the entire surface or over part of the surface

The support plate for transporting products during thermal treatment at firing temperatures is a nonporous keatite glass ceramic supporting member without a glassy surface layer. It has a nubby structure on an underside thereof and preferably C-shaped rounded edges. A method of making the keatite glass ceramic supporting member is described.

Nonporous keatite glass ceramic support plate for transporting products during heat treatment, method of making same and method of transporting products therewith

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Mainz, Germany

Klaus Schönberger