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US 11,890,359 B2Granted
Zirconia composition, partially sintered material and sintered material and methods for production thereof, and laminate
AssigneeKuraray Noritake Dental Inc.
InventorYoshihisa Ito
Life of this patent
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Abstract
A composition includes granules in which zirconia particles are aggregated. The granules have an average circularity of 0.81 or greater based on a projected image.
Claims21
A layered body, comprising:
- a first layer and a second layer that comprise granules and are adjacent to each other,
- wherein the granules in the first layer have an average circularity of 0.70 or smaller, based on a projected image, and
- wherein the granules in the second layer have an average circularity of 0.92 or greater, based on a projected image.
A method of producing a composition, comprising:
- dispersing a composition in a solvent, the composition comprising zirconia particles comprising more than 50% of primary particles having an average particle diameter in a range of from 0.01 μm to 2.5 μm in a solvent, to obtain a dispersed composition;
- drying the dispersed composition via spray drying to produce granules in which the zirconia particles are aggregated;
- putting a first layer into a mold, the first layer comprising a first composition of the composition;
- layering a second layer onto the first layer, the second layer comprising a second composition of the composition;
- and
- vibrating the mold,
- wherein granules in one of the first layer and the second layer have an average circularity of 0.70 or smaller, based on a projected image, and
- wherein granules in the other layer of the first layer and the second layer have an average circularity of 0.92 or greater, based on a projected image.
5 more elements
A method of producing a composition, comprising:
- dispersing a composition in a solvent, the composition comprising zirconia particles comprising more than 50% of primary particles having an average particle diameter in a range of from 0.01 μm to 2.5 μm in a solvent, to obtain a dispersed composition;
- drying the dispersed composition via spray drying to produce granules in which the zirconia particles are aggregated;
- putting a first layer into a mold, the first layer comprising a first composition of the composition;
- layering a second layer onto the first layer, the second layer comprising a second composition of the composition;
- and
- vibrating the mold;
- wherein granules in one of the first layer and the second layer have an average circularity of greater than 0.70 and smaller than 0.81, based on a projected image, and
- wherein granules in the other layer of the first layer and the second layer have an average circularity of 0.86 or greater, based on a projected image.
5 more elements
Dependencies are inferred from the claim text.