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US 12,559,428 B2Granted
Metal oxide ceramic nanomaterials and methods of making and using same
AssigneeIvoclar Vivadent AG
InventorsWei Xu, Yijun Wang, Dmitri Brodkin
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AssigneeIvoclar Vivadent AG
InventorsWei Xu, Yijun Wang, Dmitri Brodkin
Estimating the term…
Provided are metal oxide ceramic materials and intermediate materials thereof (e.g., nanozirconia gels, nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental articles). The nanozirconia gels are formable gels. Also provided are methods of making and using the metal oxide materials and intermediate materials. The nanozirconia gels can be made using, for example, osmotic processing. The nanozirconia gels can be used to make nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental article. The nanozirconia green bodies, pre-sintered ceramic bodies, zirconia dental ceramic materials, and dental articles have desirable properties (e.g., optical properties and mechanical properties).
A gel comprising a plurality of zirconia nanoparticles and water, wherein the zirconia nanoparticles have an average size of 10 to 30 nm, 95% or more of the zirconia nanoparticles by volume have a size of 45 nm or less, the zirconia nanoparticles are present at 70 to 85% by weight based on the total weight of the gel, and wherein the gel further comprises a processing agent chosen from colloid stabilizers, particle interaction strengthening agents, and combinations thereof.
Dependencies are inferred from the claim text.