Schott Ag

Schott Glas

Other

Monica Cotlear De Witzmann

Dietmar Wennemann

Friedrich Siebers

Angelina Milanovska

Dieter Schoenig

Daniela Petto

Bernd Schultheis

Evelin Weiss

Peter Nass

Waldemar Weinberg

Roland Dudek

Ioannis Kosmas

Klaus Schoenberger

Cora Krause

Ella Ruhl

Susanne Rapp

Eva Lauterbach

Claudia Booss

Ella Saar

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 cook top is divided into at least one cold zone and cooking zones heatable by radiant heating elements under the cooking zones. The cook top includes a transparent, colorless glass ceramic or glass plate and a non-ceramic underside layer or layers on the underside of the plate. The upper side of the glass ceramic or glass plate is free of any decoration or layer, thus providing a cooking surface having improved smoothness for easy cleaning. The non-ceramic underside layer is permeable to infrared radiation in the cooking zones and is a color-imparting decoration. The underside layer, at least in cooking zones, has transmission properties for visible light such that the radiant heating elements are not visible from above, at least when they are not in a switched-on state.

Cook-top

The cooking panel is made from an opaque glass-ceramic material uniformly colored throughout and having keatite mixed crystals as the predominant crystalline phase. The cooking panel is made by ceramicizing a ceramicizable glass or a transparent glass-ceramic with high quartz mixed crystals as the predominant crystalline phase in a definite color location range with a brightness parameter value (L*) less than 85 and a color shade and chromaticity according to its later service and wear pattern. The cooking panel makes deposited material, such as dirt and the like, less conspicuous.

Glass-ceramic cooking panel that makes deposited material, such as dirt, less conspicuous

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.

Growing community of inventors

Nieder-Olm, Germany

Monica Cotlear De Witzmann