Patent · US Active

Method to increase the strength of a form body of a lithium silicate glass ceramic

US11370702B2 · kind B2 · utility

1Cited by

5References

18Claims

0Family size

Assignee

Dentsply Sirona Inc. · US

Inventors

Stefan Fecher · Goldbach, DE
Lothar Volkl · Goldbach, DE

Key dates

Filing date	May 20, 2016
Grant date	Jun 28, 2022
Priority date	—
Expiry date	Feb 2, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C2204/00
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to a method to derive a medical form body of lithium silicate glass ceramic. To increase its strength it is proposed that in the form body comprising lithium silicate glass or containing lithium silicate glass the lithium ions are replaced by alkali ions of greater diameter to generate a surface compressive stress. To this end the form body is covered with a melt containing an alkali metal for which an aliquoted quantity of salt containing the alkali metal is used.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.