Claims
- 1. A multi-component ceramic comprising:
a major ceramic phase comprising a ceramic oxide composite; a ceramic oxide additive that is different from the major ceramic phase; and a rare earth ceramic oxide additive, wherein the total of the additives and comprise from about 0.1 weight percent to less than 50 weight percent based on the total weight the multi-component ceramic composite.
- 2. The multi-component ceramic of claim 1, wherein at least one component is nanostructured.
- 3. The multi-component ceramic of claim 1, wherein all of the components are nanostructured.
- 4. The multi-component ceramic of claim 1, wherein one or both of the ceramic oxide additive and the rare earth ceramic oxide additive is a composite.
- 5. The multi-component ceramic of claim 1, wherein the major ceramic phase comprises oxides of aluminum, boron, calcium, magnesium, or a transition metal.
- 6. The multi-component ceramic of claim 1, wherein the major ceramic phase is alumina/titania or chromia/titania.
- 7. The multi-component ceramic of claim 1, wherein the ceramic oxide additive is an oxide of aluminum, boron, calcium, magnesium, or a transition metal.
- 8. The multi-component ceramic of claim 1, wherein the ceramic oxide additive comprises an oxide of chromium, iron, nickel, niobium, titanium, or zirconium.
- 9. The multi-component ceramic of claim 1, wherein the ceramic oxide additive comprises zirconium oxide, ceria-stabilized zirconium oxide, or yttria-stabilized zirconium oxide.
- 10. The multi-component ceramic of claim 1, wherein the rare earth ceramic oxide is an oxide of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, terbium, or ytterbium.
- 11. The multi-component ceramic of claim 1, wherein the rare earth ceramic oxide is an oxide of cerium or yttrium.
- 12. The multi-component ceramic of claim 1, comprising alumina, titania, ceria, and further comprising zirconia or yttria-stabilized zirconia.
- 13. The multi-component ceramic of claim 12, wherein at least one of the components is nanostructured.
- 14. The multi-component ceramic of claim 1, comprising chromia, titania, ceria, and further comprising zirconia or yttria-stabilized zirconia.
- 15. The multi-component ceramic of claim 14, wherein at least one of the components is nanostructured.
- 16. The multi-component ceramic of claim 1, wherein the combination of additives comprises about 10 to about 40 wt % of the total weight of the composite.
- 17. The multi-component ceramic of claim 1, wherein the combination of additives comprises about 10 wt % to about 30 wt % of the total weight of the composite.
- 18. A multi-component microstructured or nanostructured multi-component ceramic comprising
a major ceramic oxide phase comprising a ceramic oxide composite; and one of a ceramic oxide additive or a rare earth ceramic oxide additive, wherein the amount of the additive comprises from about 0.1 weight percent to less than 50 weight percent based on the total weight the multi-component ceramic composite.
- 19. The multi-component ceramic of claim 18, wherein all of the components are nanostructured.
- 20. The multi-component ceramic of claim 18, wherein one or both of the ceramic oxide additive and the rare earth ceramic oxide additive is a composite.
- 21. The multi-component ceramic of claim 18, wherein the major ceramic phase comprises oxides of aluminum, boron, calcium, magnesium, or a transition metal.
- 22. The multi-component ceramic of claim 18, wherein the major ceramic phase is alumina/titania or chromia/titania.
- 23. The multi-component ceramic of claim 18, wherein the ceramic oxide additive is an oxide of aluminum, boron, calcium, magnesium, or a transition metal.
- 24. The multi-component ceramic of claim 18, wherein the ceramic oxide additive comprises an oxide of chromium, iron, nickel, niobium, titanium, or zirconium.
- 25. The multi-component ceramic of claim 18, wherein the ceramic oxide additive comprises zirconium oxide, ceria-stabilized zirconium oxide, or yttria-stabilized zirconium oxide.
- 26. The multi-component ceramic of claim 18, wherein the rare earth ceramic oxide is an oxide of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, terbium, or ytterbium.
- 27. The multi-component ceramic of claim 18, wherein the rare earth ceramic oxide is an oxide of cerium or yttrium.
- 28. The multi-component ceramic of claim 18, comprising alumina, titania, and one of zirconia, ceria-stabilized zirconia, yttria-stabilized zirconia, ceria, or yttria.
- 29. The multi-component ceramic of claim 18, comprising chromia, titania, and one of zirconia, ceria-stabilized zirconia, yttria-stabilized zirconia, ceria, or yttria.
- 30. The multi-component ceramic of claim 18, wherein the additive comprises about 1 to about 30 wt % of the total weight of the composite.
- 31. A method for the manufacture of reconstituted, multi-component, ceramic composite powders, comprising
mixing and blending constituent powders; de-agglomerating the mixture of constituent powders; dispersing the de-agglomerated powders; optionally adding one or more binders to the dispersion of de-agglomerated powders; spray drying the dispersion to form reconstituted powders; and optionally heat treating the spray-dried powders.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefits of U.S. Provisional Patent Application Serial No. 60/234,479, filed Sep. 22, 2000, which is fully incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60234479 |
Sep 2000 |
US |