Sinterable lithium disilicate glass ceramic

• US 6,514,893 B1
• Filed: 10/19/1999
• Issued: 02/04/2003
• Est. Priority Date: 09/05/1996
• Status: Expired due to Term

• Current Assignee: Ivoclar AG
• Original Assignee: Ivoclar AG
• Inventors: Frank, Martin, Hoeland, Wolfram, Rheinberger, Volker, Schweiger, Marcel
• Primary Examiner(s): SAMPLE, DAVID R
• Application Number:
  US09/419,550
• Time in Patent Office: 1,204 Days
• Field of Search: 501/5, 501/7, 501/57, 501/63, 501/64, 501/65, 501/66, 501/67, 501/69, 501/70, 501/72
• US Class Current: 501/63
• CPC Class Codes: A61K 6/17 Particle size
• CPC Class Codes: A61K 6/78 Pigments
• CPC Class Codes: A61K 6/807 comprising magnesium oxide
• CPC Class Codes: A61K 6/818 comprising zirconium oxide
• CPC Class Codes: A61K 6/824 comprising transition metal oxides
• CPC Class Codes: A61K 6/833 Glass-ceramic composites
• CPC Class Codes: C03C 10/0009 containing silica as main constituent
• CPC Class Codes: C03C 10/0027 containing SiO2, Al2O3, Li2O as main constituents

Abstract

High-strength sinterable lithium disilicate glass ceramics are described which can be further processed in particular by pressing in the viscous state to shaped dental products.

Claims

1. A lithium disilicate glass comprising the following components:

2. The lithium disilicate glass according to claim 1, wherein the color components are formed from glass-coloring oxides in a quantity of 0 to 5.0 wt. %.

3. The lithium disilicate glass according to claim 1, wherein the glass consists essentially of the components specified.

4. The lithium disilicate glass according to claim 1, wherein the color components comprise the glass-coloring oxides TiO₂, CeO₂, Fe₂O₃, or mixtures thereof.

5. The lithium disilicate glass according to claim 1, further comprising in admixture with the glass doped spinels, doped ZrO₂, or mixtures thereof as coloring bodies.

6. The lithium disilicate glass according to claim 1, wherein the additional components are F, Na₂O, ZrO₂, BaO, SrO, or mixtures thereof.

7. The lithium disilicate glass according to claim 1, wherein the quantities of the components, independently of one another, are as follows:

8. The lithium disilicate glass according to claim 7, wherein the composition includes: