Schott Ag

Schott Glas

Gerhard Hahn

Bernd Hoppe

Friedrich-Georg Schroeder

Otmar Becker

Helga Goetz

Michael Bug

Andreas Langsdorf

Hauke Esemann

Falk Gabel

Ulrich Fotheringham

Dietmar Wennemann

Roland Hochhaus

Veit Luther

Thoralf Johansson

Petra Grewer

Hermann Lemm

Michael Glasenapp

Bernd Weitzel

Thomas Schuler

Guenther Siebenhaar

Friedrich Siebers

Wolfgang Schmidbauer

Ulrich Lange

Inka Henze

Harald Striegler

Jan-Peter Ortmann

Hans-Walter Abraham

Erich Rodek

Norbert Greulich-Hickmann

Roland Dudek

Bernd Ruedinger

Matthias Brinkmann

Klaus Schönberger

Michael Clauss

Sybill Nüttgens

Ottmar Becker

Sybill Nuettgens

Fritz Schroeder

Andreas Schminke

Markus Garsche-Andres

Rainer Best

Hubertus Bader

Sybill N&uuml;ttgens

Friedrich Georg Schroeder

Markus Borrmann

Helga GÖTZ

Günther Siebenhaar

Friedrich-Georg SCHRÖDER

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

In order to obtain glass or glass ceramic materials having increased strength, the invention provides a method for producing glass or glass ceramic articles, which comprises the steps:

Method for producing glass or glass ceramic and in particular glass or glass ceramic article

In order to provide a particularly homogeneous pressure and temperature profile in a gas cushion for the levitating support of glass or glass ceramic, the invention provides a device () for transporting or supporting glass ceramic or glass, which comprises at least one diaphragm () that has at least one continuous bearing surface () and at least one gas feed chamber (-) and at least one gas discharge chamber (-), the gas feed chamber (-) and the gas discharge chamber (-) having a gas-permeable connection to the bearing surface ().

Method and device for the contactless transport or support of glass or glass ceramic

In the process for partially shaping, a glass/glass ceramic article () is held on a planar support plate () by suction. The glass/glass ceramic article is heated to soften it, so that it has a viscosity below 10dPa&#xb7;s. After the softening one or more shaping dies () is or are moved upward through an opening or respective openings () in the support plate to form raised regions in the softened glass/glass ceramic article (). The suction force is produced by a low pressure in a hollow compartment () below the support plate () and acts on the glass/glass ceramic article () by means of a gap (G) formed between each shaping die () and the support plate. Additional openings can be provided in the support plate and/or in one or more of the shaping dies to assist in applying the suction force to the glass/glass ceramic article. After solidification of the softened glass/glass-ceramic article the shaping die or dies () is or are withdrawn. Then the partially shaped glass/glass ceramic product is removed by compressed air and/or mechanically with lifting members (). An apparatus for performing this process is also described.

Process for partial shaping of flat glass or glass-ceramic articles and apparatus for performing same

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 a method of producing glass-ceramic parts and/or glass parts by deformation of a glass-ceramic blank and/or glass blank. The invention is characterized in that forming is carried out using infrared radiation.

Method of forming glass-ceramic parts and/or glass parts

Process and device for ceramising the base glass of glass ceramics

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Allenfeld, Germany

Gerhard Hahn