The invention relates to compositions based on ZrO2, and single- and multi-coloured blanks made from oxide ceramics, and a process for their preparation, in which a) oxide ceramic powder is coated with a colouring substance,b) the coated powders are preferably graded and at least one coloured powder
The invention relates to compositions based on ZrO2, and single- and multi-coloured blanks made from oxide ceramics, and a process for their preparation, in which a) oxide ceramic powder is coated with a colouring substance,b) the coated powders are preferably graded and at least one coloured powder is filled into a compression mould,c) the coloured powder or powders are compressed to produce a shaped body, andd) the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations.
대표청구항▼
1. A composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O30.001-0.003Fe, calculated as Fe2O30.005-0.04 Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.0001-0.0005. 2. A composition comprising ZrO2, the composition furt
1. A composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O30.001-0.003Fe, calculated as Fe2O30.005-0.04 Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.0001-0.0005. 2. A composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O30.002-0.004Fe, calculated as Fe2O30.04-0.15Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.0003-0.002. 3. A composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O3 0.003-0.006Fe, calculated as Fe2O3 0.04-0.15Tb, calculated as Tb2O3 0.0005-0.004 Mn, calculated as Mn2O3 0.0005-0.002. 4. A composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O30.003-0.006Fe, calculated as Fe2O30.04-0.25Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.001-0.007. 5. A multi-colored shaped body comprising a composition comprising ZrO2 and further comprising the following components: Pr, calculated as Pr2O3,Fe, calculated as Fe2O3,Tb, calculated as Tb2O3, andMn, calculated as Mn2O3,in a total quantity of 0.0001 to 0.75 wt.-%,wherein the multi-coloration is produced by differently colored layers. 6. The shaped body according to claim 5, wherein said composition comprises Tb, calculated as Tb2O3, in a quantity of 0.0001 to 0.075 wt.-% and. 7. The shaped body according to claim 6, wherein said composition comprises the components in a total quantity of 0.0001 to 0.6 wt.-%. 8. The shaped body according to claim 7, wherein said composition comprises the components in a total quantity of 0.0004 to 0.37 wt.-%. 9. The shaped body according to claim 6, wherein said composition comprises the components in the following quantities, in wt.-%: Pr, calculated as Pr2O30.0001-0.01 Fe, calculated as Fe2O30.005-0.5 Tb, calculated as Tb2O3 0.0001-0.1 Mn, calculated as Mn2O30.0001-0.1. 10. The shaped body according to claim 6, wherein said composition comprises Pr, calculated as Pr2O3, in a quantity of 0.0005 to 0.01 wt.-%. 11. The shaped body according to claim 6, wherein said composition comprises Fe, calculated as Fe2O3, in a quantity of 0.0005 to 0.4 wt.-%. 12. The shaped body according to claim 6, wherein said composition comprises Fe, calculated as Mn2O3, in a quantity of 0.0001 to 0.075 wt.-%. 13. The shaped body according to claim 6, wherein said composition comprises 4 to 8 wt.-% Y2O3. 14. The shaped body according to claim 6, wherein said composition comprises up to 1 wt.-% Al2O3. 15. The shaped body according to claim 6, wherein said composition is a powder composition and comprises 98.0 to 99.9999 wt.-% of nanoscale ZrO2 powder. 16. The shaped body according to claim 15, wherein the nanoscale ZrO2 powder has a specific surface area of ≧100 m2*g-1. 17. The shaped body according to claim 15, wherein the nanoscale ZrO2 powder has a primary particle size between 5 and 50 nm. 18. The shaped body according to claim 6, wherein said composition is obtainable by a process in which a powder based on ZrO2 is coated with compounds of Pr, Tb, Fe and/or Mn. 19. The shaped body according to claim 18, wherein the powder is coated by means of fluidized bed coating. 20. The shaped body according to claim 6, wherein the shaped body is in the form of a blank, dental shaped part or dental restoration. 21. The shaped body according to claim 6, wherein the shaped body comprises at least 2 differently colored layers. 22. The shaped body according to claim 21, wherein the shaped body comprises up to 8 differently colored layers. 23. The shaped body according to claim 21, wherein at least one layer has the composition according to claim 1. 24. The shaped body according to claim 21, wherein at least one layer has a composition comprising ZrO2, the composition further comprising the following components in wt.-%: Pr, calculated as Pr2O30.001-0.003Fe, calculated as Fe2O30.005-0.04 Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O3 0.0001-0.0005. 25. A dental restoration comprising the shaped body according to claim 21. 26. The dental restoration according to claim 25, wherein the dental restoration is in the form of a crown or a bridge. 27. A single- or multi-colored body made from colored oxide ceramic powder having a ratio of oxide ceramic component to mixtures of coloring oxides, of 100: 0.0001 to 2.0 parts by weight, wherein Pr2O3, Fe2O3, Tb2O3 and Cr2O3 are used as coloring oxides and wherein Tb2O3is used in a quantity of 0.0001 to 0.075 wt. %. 28. The single- or multi-colored body according to claim 27, wherein the coloring oxides are selected from the oxides of the d- and f-elements of the periodic table. 29. The single- or multi-colored body according to claim 28, wherein oxides of V, Ti, Nd, Eu, Dy, Er and/or Yb are used as further coloring oxides. 30. A dental restoration part comprising the shaped body according to claim 21. 31. A single- or multi-colored body made from colored oxide ceramic powder having a ratio of oxide ceramic component to mixtures of coloring oxides, of 100: 0.0001 to 2.0 parts by weight, wherein Pr2O3, Fe2O3, Tb2O3 and Mn2O3 are used as coloring oxides, wherein the coloring oxides are used in the following quantities, in wt.-%: Pr, calculated as Pr2O30.001-0.003Fe, calculated as Fe2O30.005-0.04 Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O3 0.0001-0.0005. 32. A single- or multi-colored body made from colored oxide ceramic powder having a ratio of oxide ceramic component to mixtures of coloring oxides, of 100: 0.0001 to 2.0 parts by weight, wherein Pr2O3, Fe2O3, Tb2O3 and Mn2O3 are used as coloring oxides, wherein the coloring oxides are used in the following quantities, in wt.-%: Pr, calculated as Pr2O30.002-0.004Fe, calculated as Fe2O30.04-0.15Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.0003-0.002. 33. A single- or multi-colored body made from colored oxide ceramic powder having a ratio of oxide ceramic component to mixtures of coloring oxides, of 100: 0.0001 to 2.0 parts by weight, wherein Pr2O3, Fe2O3, Tb2O3 and Mn2O3 are used as coloring oxides, wherein the coloring oxides are used in the following quantities, in wt.-%: Pr, calculated as Pr2O3 0.003-0.006Fe, calculated as Fe2O3 0.04-0.15Tb, calculated as Tb2O3 0.0005-0.004 Mn, calculated as Mn2O30.0005-0.002. 34. A single- or multi-colored body made from colored oxide ceramic powder having a ratio of oxide ceramic component to mixtures of coloring oxides, of 100: 0.0001 to 2.0 parts by weight, wherein Pr2O3, Fe2O3, Tb2O3 and Mn2O3 are used as coloring oxides, wherein the coloring oxides are used in the following quantities, in wt.-%: Pr, calculated as Pr2O30.003-0.006Fe, calculated as Fe2O30.04-0.25Tb, calculated as Tb2O30.0005-0.004 Mn, calculated as Mn2O30.001-0.007. 35. The shaped body according to claim 5, wherein the shaped body is in the form of a blank, dental shaped part or dental restoration. 36. The shaped body according to claim 5, wherein the shaped body comprises at least 2 differently colored layers. 37. The shaped body according to claim 36, wherein the shaped body comprises up to 8 differently colored layers. 38. A dental restoration comprising the shaped body according to claim 5. 39. The dental restoration according to claim 38, wherein the dental restoration is in the form of a crown or a bridge.
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