High-strength colored glass ceramics as a cooktop, smooth on both sides

US10028580B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Birgit Doerk · Mainz, DE
• Evelin Weiss · Mainz, DE
• Thomas Zenker · Nieder-Olm, DE
• Ulf Hoffmann · Pfungstadt, DE
• Silke Knoche · Saulheim, DE
• Martin Taplan · Rheinböllen, DE
• Friedrich Siebers · Nierstein, DE
• Thomas Kraus · Nieder-Olm, DE
• Lutz Klippe · Wiesbaden, DE
• Wolfgang Schmidbauer · Mainz, DE

Key dates

• Filing date: Jun 6, 2012
• Grant date: Jul 24, 2018
• Expiry date: Oct 24, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24C15/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A glass-ceramic cooktop is provided that is made of glass-ceramic material with a flat upper side and an underside. The glass-ceramic material has transmittance values of greater than 0.1% in the visible light range in the total wavelength region greater than 420 nm, a light transmittance in the visible range of 0.8-2.5%, and a transmittance of 0-85% in the infrared at 1600 nm, and wherein the glass-ceramic material has high quartz mixed crystals as the prevalent crystal phase. The underside is flat, unstructured, and coplanar with the upper side.