Glass ceramic with reduced lithium content

US11072557B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Evelin Weiss · Mainz, DE
• Meike Schneider · Taunusstein, DE
• Oliver Hochrein · Mainz, DE
• Friedrich Siebers · Nierstein, DE
• Roland Dudek · Bad Kreuznach, DE
• Martin Mueller · Walldorf, DE
• Matthias Bockmeyer · Mainz, DE
• Birgit Doerk · Mainz, DE

Key dates

• Filing date: Dec 20, 2018
• Grant date: Jul 27, 2021
• Expiry date: Dec 20, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24C15/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A transparent colored glass ceramic, in particular an LAS glass ceramic, suitable for use as a cooking surface is provided. The transparent colored glass ceramic includes high-quartz solid solution (HQ s.s.) as a main crystal phase and exhibits thermal expansion of −1 to +1 ppm/K in the range from 20° C. to 700° C. The glass ceramic has from 3.0 to 3.6 percent by weight of lithium oxide (Li2O) as constituents and either is colored with 0.003 to 0.05 percent by weight of vanadium oxide (V2O5) or is colored with 0.003 to 0.25 percent by weight of molybdenum oxide (MoO3).