Lithium silicate glass ceramic and glass with rubidium oxide content
AssigneeIvoclar Vivadent AG
InventorsVolker Rheinberger, Markus Rampf, Marc Dittmer, Christian Ritzberger, Wolfram Höland, Marcel Schweiger
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Abstract
The invention relates to the use of lithium silicate glass ceramics and glasses with rubidium oxide content for coating an oxide ceramic, a metal or an alloy.
Claims46
Composite material which comprises a lithium silicate glass ceramic or a lithium silicate glass, which comprise the following components
- Component
- wt.-%
- SiO2
- 56.0 to 73.0
- Li2O
- 13.0 to 19.0
- Rb2O
- 3.0 to 9.0
- A12O3
- 2.0 to 5.0
- P2O5
- 2.0 to 6.0
- ZrO2
- 0 to 4.5
- on a substrate selected from oxide ceramics, metals and alloys.
Process for coating a substrate selected from oxide ceramics, metals and alloys, in which a lithium silicate glass ceramic or a lithium silicate glass which comprise the following components
- Component
- wt.-%
- SiO2
- 56.0 to 73.0
- Li2O
- 13.0 to 19.0
- Rb2O
- 3.0 to 9.0
- A12O3
- 2.0 to 5.0
- P2O5
- 2.0 to 6.0
- ZrO2
- 0 to 4.5
- is applied to the substrate.
Process for coating a substrate selected from oxide ceramics, metals and alloys, in which a lithium silicate glass ceramic or a lithium silicate glass which comprise the following components
- Component
- wt.-%
- SiO2
- 56.0 to 73.0
- Li2O
- 13.0 to 19.0
- Rb2O
- 3.0 to 9.0
- Al2O3
- 2.0 to 5.0
- P2O5
- 2.0 to 6.0
- is applied to the substrate and in which a coating is obtained which comprises a lithium silicate glass ceramic that comprises lithium metasilicate as main crystal phase, and which has a bending strength in the range of about 180 to 300 MPa and/or a fracture toughness, measured as KIC value, of at least about 2.0 MPa·m0.5.
Lithium silicate glass ceramic, which comprises the following components in the given amounts
- Component
- wt.-%
- SiO2
- 56.0 to 72.5
- Li2O
- 13.0 to 19.0
- Rb2O
- 3.0 to 9.0
- Al2O3
- 2.0 to 5.0
- P2O5
- 2.0 to 6.0
- ZrO2
- 0 to 4.5
- Transition
- 0 to 7.5,
- metal oxide
- wherein the transition metal oxide is selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
Lithium silicate glass ceramic, which comprises the following components in the given amounts
- Component
- wt.-%
- SiO2
- 56.9 to 72.0
- Li2O
- 14.2 to 18.0
- Rb2O
- 3.7 to 7.7
- Al2O3
- 2.5 to 4.5
- P2O5
- 3.1 to 5.0
- ZrO2
- 0 to 4.0
- Transition
- 0 to 7.0,
- metal oxide
- wherein the transition metal oxide is selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
Dependencies are inferred from the claim text.