Lithium silicate glass ceramic

US10407341B2 · 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: Sep 27, 2017
• Grant date: Sep 10, 2019
• Expiry date: Sep 27, 2037

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.