Lithium silicate glass ceramic

US11117829B2 · kind B2 · utility

Assignee

• Dentsply Sirona Inc. · US

Inventors

• Markus Vollmann · Gelnhausen, DE
• Irmgard WISSEL · Alzenau, DE
• Marcel Meegdes · Gerolzhofen, DE
• Carsten Wiesner · Rockenberg, DE

Key dates

• Filing date: Jul 31, 2019
• Grant date: Sep 14, 2021
• Expiry date: Sep 16, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2204/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a lithium silicate glass ceramic, which contains at least lithium disilicate as a crystal phase, and lithium aluminum silicate as further crystal phase. The lithium silicate glass ceramic in its initial composition contains Al2O3 at 1.5 to 3.5 percent by weight, and K2O at 0.6 to 1.8 percent by weight.