Transparent lithium glass-ceramic material, production and use thereof

US9862633B2 · kind B2 · utility

Assignee

• Schott AG · DE

Inventors

• Falk Gabel · Schlangenbad, DE
• Otmar Becker · Langen, DE
• Michael Glasenapp · Duisburg, DE
• Jan-Peter Ortmann · Nieder-Olm, DE
• Petra Grewer · Wiesbaden, DE
• Veit Luther · Hattersheim, DE
• Harald Striegler · Ockenheim, DE
• Dietmar Wennemann · Albig, DE
• Thomas R. Schuler · Galena Park, US
• Thoralf Johansson · Nieder-Olm, DE
• Helga Goetz · Heidesheim, DE
• Michael Bug · Floh-Seligenthal, DE
• Guenther Siebenhaar · Bodenheim, DE
• Gerhard Hahn · Allenfeld, DE
• Friedrich Schroeder · Stuttgart, DE

Key dates

• Filing date: Dec 29, 2015
• Grant date: Jan 9, 2018
• Expiry date: Dec 29, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/315
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.