Lithium silicate glass ceramic with easy machinability
AssigneeIvoclar Vivadent AG
InventorChristian Ritzberger
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Abstract
A lithium silicate glass ceramic having lithium metasilicate as main crystal phase and having not more than 30 wt.-% of lithium metasilicate crystals.
Claims19
A lithium silicate glass ceramic, which comprises lithium metasilicate as main crystal phase and comprises not more than 30 wt.-% of lithium metasilicate crystals, wherein the glass ceramic comprises 0.5 to 7.0 wt.-% P2O5 and wherein the molar ratio of SiO2 to Li2O is in the range of 2.9 to 5.0.
A lithium silicate glass ceramic, which comprises lithium metasilicate as main crystal phase and comprises not more than 30 wt.-% of lithium metasilicate crystals, wherein the molar ratio of SiO2 to Li2O is in the range of 2.9 to 5.0 and wherein the average size of the lithium metasilicate crystals is in the range of 5 to 80 nm.
A lithium silicate glass ceramic, which comprises lithium metasilicate as main crystal phase and comprises not more than 30 wt.-% of lithium metasilicate crystals, wherein the glass ceramic comprises 5.1 to 10.0 wt.-% K2O and wherein the molar ratio of SiO2 to Li2O is in the range of 2.9 to 5.0.
Dependencies are inferred from the claim text.