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US 5,968,856 AGranted
Sinterable lithium disilicate glass ceramic
AssigneeIvoclar AG
InventorsMarcel Schweiger, Martin Frank, Volker Rheinberger, Wolfram Hoeland
Life of this patent
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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.
Claims8
A lithium disilicate glass ceramic, which comprises the following components:
- ______________________________________ Component Wt. % ______________________________________ SiO.sub.2 57.0 to 80.0 Al.sub.2 O.sub.3 0 to 5.0 La.sub.2 O.sub.3 0.1 to 6.0 MgO 0 to 5.0 ZnO 0 to 8.0 K.sub.2 O 0 to 13.5 Li.sub.2 O 11.0 to 19.0 P.sub.2 O.sub.5 0 to 11.0 Color components 0 to 8.0 Additional components 0 to 6.0 ______________________________________
- wherein
- Al.sub.2 O.sub.3 +La.sub.2 O.sub.3 equals 0.1 to 7.0 wt. % and
- MgO+ZnO equals 0.1 to 9.0 wt. %.
1 more element
Dependencies are inferred from the claim text.