Schott Ag

Schott Glas

Michael Bug

Otmar Becker

Friedrich Siebers

Falk Gabel

Gerhard Hahn

Thoralf Johansson

Evelin Weiss

Dietmar Wennemann

Harald Striegler

Bernd Ruedinger

Friedrich-Georg Schroeder

Veit Luther

Klaus Schönberger

Petra Grewer

Jan-Peter Ortmann

Michael Glasenapp

Thomas Schuler

Guenther Siebenhaar

Wolfgang Schmidbauer

Matthias Bockmeyer

Ina Mitra

Christian Kunert

Inka Henze

Helga Goetz

Erich Rodek

Thomas Zenker

Oliver Hochrein

Ioannis Kosmas

Cora Krause

Martin Spier

Martin Mueller

Uwe Martens

Ottmar Becker

Christian Roos

Andreas Schminke

Fritz Schroeder

Rainer Best

Jutta Reichert

Johannes Stinner

Manfred-Josef Borens

Peter Franke

Gerald Wasem

Joachim Dietrich Kehl

Frank Jürgen Druschke

Helga GÖTZ

Günther Siebenhaar

Friedrich-Georg SCHRÖDER

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

An LAS-glass for producing a transparent glass-ceramic and an LAS-glass-ceramic having a predetermined chroma C* and a predetermined visually determinable scatter value (S) are provided. The LAS-glass and LAS-glass-ceramic has a process window as large as possible during the nucleus formation process with respect to the residence time in the relevant temperature range for the formation of nuclei.

Glass and glass ceramic

A lithium-containing, transparent glass-ceramic material is provided. The material has low thermal expansion and has an amorphous, lithium-depleted, vitreous surface zone. The zone is at least 50 nm thick on all sides and encloses a crystalline interior, which has high transmission. The material includes a transition region connecting the zone and the interior.

Transparent lithium glass-ceramic material, production and use thereof

The method produces a glass-ceramic article substantially in the form of a plate with improved high temperature difference resistance or strength. The glass-ceramic article contains keatite mixed crystals (KMK) or high quartz mixed crystals (HQMK) as well as the keatite mixed crystals (KMK). The method includes heating a glass-ceramic in a high quartz mixed crystal state to form the keatite mixed crystals with a heating rate of 20 K/min to 150 K/min, preferably more than 15 K/min, especially preferably more than 20 K/min. These high heating rates increase the temperature difference resistance.

Method of making a glass-ceramic article

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

The invention relates to lead- and cadmium-free glass for glazing, enamelling and decorating glasses or glass-ceramics which have a low coefficient of thermal expansion of less than 2&times;10 /K, having the composition (in % by weight) 0-6 Li O, 0-5 Na O, 0 to less than 2 K O, where the sum Li O&plus;K &plus;Na O is between 2 and 12, 0-4 MgO, 0-4 CaO, 0-4 SrO, 0-1 BaO, 0-4 ZnO, 3 to less than 10 Al O , 13-23 B O , 50-65 SiO , 0-4 TiO , 0-4 ZrO and 0-4 F, as replacement for oxygen and containing up to 30% by weight of a pigment which is resistant at the firing temperature, where the glass is suitable for glazing, enamelling and decoration in both primary and secondary firing, and both the full-area and sparse glaze, enamel or decoration layers have low abrasion susceptibility after firing, and it relates to processes for the production of a glass-ceramic coated therewith.

Cooking surface for cooking food having a glass ceramic surface with a glass coating thereon

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Muehltal, Germany

Michael Bug