Schott Ag

Schott Glas

Schott Glaswerke

Dietmar Wennemann

Harald Striegler

Monica Cotlear De Witzmann

Angelina Milanovska

Dieter Schoenig

Friedrich Siebers

Peter Nass

Falk Gabel

Otmar Becker

Gerhard Hahn

Helga Goetz

Michael Bug

Ioannis Kosmas

Friedrich-Georg Schroeder

Annette Lukas

Veit Luther

Thoralf Johansson

Petra Grewer

Jan-Peter Ortmann

Daniela Petto

Thomas Schuler

Michael Glasenapp

Guenther Siebenhaar

Evelin Weiss

Waldemar Weinberg

Stefan Hubert

Ella Ruhl

Patrik Schober

Joachim Gr&uuml;tzke

Susanne Rapp

Eva Lauterbach

Dietmar Schoenig

Dieter Schonig

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

The black-colored glass ceramic panel has a cooking surface provided with a smooth black decoration by burning in a decorative paint, which contains a colorless zinc-containing glass flux and up to 10 wt. % of a partially coated pigment. The partially coated pigment consists of 20 to 40 wt. % of a black pigment with a grain size of at most 5&#x3bc; and a grain size distribution characterized by a D&#x3c;2&#x3bc; and 60 to 80% by weight of a zinc-free boro-alumino-silicate glass coating the black pigment. The glass flux consists, in wt. %, of LiO, 0-5; NaO, 0-5; KO, &#x3c;2; &#x3a3;LiO+NaO+KO, 1-10; MgO, 0-3; CaO, 0-4; SrO, 0-4; BaO, 0-4; ZnO, &#x3e;0-4; BO, 15-27; AlO, 10-20; SiO, 43-58; TiO, 0-3; ZrO, SbO, 0-2; F, 0-3.

Glass ceramic panel with a pleasing black decoration applied with a decorative paint

The cook top includes a colorless transparent glass ceramic plate, which is provided with an opaque coating extending over its underside, except that in at least one window area a window coating is provided on the underside of the glass ceramic plate area instead of the opaque coating. In order to optimize colored displays arranged under the at least one window area and to facilitate the use of capacitive touch sensors, the window coating is a burned-in noble metal preparation with an electrical surface resistance of 1 M&#x3a9;/&#x25a1; and in the at least one window area the glass ceramic plate coated with the window coating has a transmission in a range from 1.0 to 21.0% and a light scattering in a range of from 0.0 to 1.0% for visible light with wavelengths of from 400 nm to 750 nm.

Cook top comprising a glass ceramic plate having an opaque coating and an improved window coating on a display window on an underside of the plate

The glass ceramic plate for a cooking apparatus is transparent to visible light and IR radiation and has a noble metal film on its underside. The noble metal film is composed of an alloy of gold, platinum and/or palladium, which imparts a reflective property to it. It contains from 0 to 5 percent by weight, in relation to a total metal content, of silver, copper, silicon, bismuth and other metals that are not noble metals. The glass ceramic plate coated with the noble metal film has a spectral transmission of 0 to 12% in the infrared region of the spectrum. When a decoration consisting of a grid of unsymmetrically distributed elements is provided on the topside of the glass ceramic plate, defects in the glass ceramic material can be concealed. The invention also includes a method of coating.

Glass ceramic plate providing a cooking surface for a cooking apparatus and having a coating on an underside thereof and coating process for making same

The glass ceramic or glass element that can be subjected to high thermal loads is decorated with a metallic colorant. The metallic colorant consists of a melted silicate and at least one effect pigment, which is included in a specified proportion in a melt of the silicate glass to form the metallic colorant. The at least one effect pigment is in the form of platelets of synthetic aluminum oxide (AlO) coated with at least one metal oxide. Preferably the at least one effect pigment is a XIRALLIC&#xae; high chroma sparkle pigment supplied commercially by Merck and the metallic colorant has a pigment content of from 1 to 30 wt. %.

Glass ceramic or glass element that can be subjected to great thermal loads and is decorated with a metallic color

The glass ceramic panels are non-transparent and have at least one decoration. In order to fulfill the requirements for a glass ceramic panel that provides a cooking surface for a cooking unit in a variety of different pleasing colors, especially a creamy white color shade (BISQUE), in an economical manner, the glass ceramic panel has a predominant crystalline phase of keatite mixed crystals and a full-surface decorative coating that covers at least 80 percent of the upper smooth surface of the glass ceramic substrate. The full-surface decorative coating is provided in a different color from,the glass ceramic panel. Methods for making these glass ceramic panels are described.

Cooking device with a glass-ceramic panel providing a cooking surface in a variety of different colors and method of making same

The cooking unit has a glass-ceramic panel () providing a cooking surface, which is made of transparent colorless glass-ceramic bulk material or a glass panel made of pre-stressed transparent colorless glass material. Radiant heating elements () are provided under the glass or glass-ceramic panel, which heat respective cooking zones. The glass or glass-ceramic panel has a full surface decorative coating () on its upper side, which makes dirt and usage marks less conspicuous, and an IR permeable coating () having a solid or plain color, preferably bisque-like, on its underside. The IR permeable coating having the solid or plain color prevents an observer from viewing the internal components of the cooking unit that are under the cooking panel from above it.

Cooking unit with a glass-ceramic or glass panel made of transparent colorless material and provided with an IR permeable solid colored underside coating

The glass ceramic panels are non-transparent and have at least one decoration. In order to fulfill the requirements for a glass ceramic panel that provides a cooking surface for a cooking unit in a variety of different pleasing colors, especially a creamy white color shade (BISQUE), in an economical manner, the glass ceramic panel has a predominant crystalline phase of keatite mixed crystals and a full-surface decorative coating that covers at least 80 percent of the upper smooth surface of the glass ceramic substrate. The full-surface decorative coating is provided in a different color from the glass ceramic panel. Methods for making these glass ceramic panels are described.

Stove or grill having a cook top, hob or cooking surface for cooking food. The cook top or hob is made of a glass ceramic material. The top surface of the cook top or hob has at least one groove-shaped depression to define and separate various zone and cooking areas on the cook top or hob.

Stove or grill for cooking, and a stove or grill for cooking having a glass ceramic cook top or hob, and a glass ceramic plate cook top or hob for use in a stove or grill

Modern cooking ranges have a glass-ceramic panel ( ) providing a cooking surface with at least one cooking zone, which typically is associated with a radiating heated body. To indicate the cooking zone and, if necessary, the residual heat, it is known to associate an externally lighted annular glass with the heated body, which is observable from above as a lighted ring. A structured lighted cooking zone indicating device is provided according to the present invention by a structured light-impermeable coating layer ( ) applied directly to the underside of the glass-ceramic panel ( ) having transparent regions forming a predetermined or desired structure or pattern within the cooking zone indicating device. This cooking zone indicating device is made by a screen printing technique in which a heat-resistant light-impermeable varnish is applied to the underside of the glass-ceramic panel to form the structured coating layer ( ).

Glass-ceramic panel providing a cooking surface with a cooking zone indicating device and method of making same

A glass-ceramic article decorated with ceramic colorings has a first coloration layer over which at least a second coloration layer is arranged. The second coloration layer at least partially overlaps the first coloration layer. The first coloration layer can be applied as a base decor over a large area and be finely distributed on the surface of the glass-ceramic article. The base decor, for example, also protects the surface of the glass-ceramic article against scratches. The second coloration layer is colored differently and, as a marking decor, defines, for example, the cooking zones and facilitates the confusion-free recognition of the thereby individualized color function areas.

Glass-ceramic article decorated with ceramic colorings and method for

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Albig, Germany

Dietmar Wennemann