Method of making a glass-ceramic article

US7205252B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Otmar Becker · Langen, DE
• Falk Gabel · Schlangenbad, DE
• Christian Roos · Bad Soden am Taunus, DE
• Bernd Ruedinger · Wörrstadt, DE
• Friedrich Siebers · Nierstein, DE
• Michael Bug · Floh-Seligenthal, DE
• Ioannis Kosmas · Stadecken-Elsheim, DE
• Wolfgang Schmidbauer · Mainz, DE
• Martin Mueller · Darmstadt, DE

Key dates

• Filing date: May 9, 2005
• Grant date: Apr 17, 2007
• Expiry date: Nov 10, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C10/0054
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The method produces a glass-ceramic article substantially in the form of a plate with improved high temperature difference resistance or strength. The glass-ceramic article contains keatite mixed crystals (KMK) or high quartz mixed crystals (HQMK) as well as the keatite mixed crystals (KMK). The method includes heating a glass-ceramic in a high quartz mixed crystal state to form the keatite mixed crystals with a heating rate of 20 K/min to 150 K/min, preferably more than 15 K/min, especially preferably more than 20 K/min. These high heating rates increase the temperature difference resistance.