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US 7,452,836 B2Granted
Lithium silicate glass ceramic
AssigneeIvoclar Vivadent AG
InventorsElke Apel, Wolfram Höland, Marcel Schweiger, Christian van t'Hoen, Harald Bürke, Volker M. Rheinberger
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Abstract
Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.
Claims23
A lithium silicate glass ceramic which comprises the following components:
- Component
- wt.-%
- SiO2
- 64.0-75.0
- Li2O
- 13.0-17.0
- K2O
- 2.0-5.0
- Al2O3
- 0.5-5.0
- Nucleating agent
- 2.0-5.0
- Me(II)O
- 0-3.0
- ZrO2
- 0.1-4.0
- and which comprises less than 0.1 wt. % of ZnO,
- with Me(II)O being selected from at least one of CaO, BaO, MgO and SrO.
15 more elements
Dependencies are inferred from the claim text.