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US 2017/0247295 A1Published application
Zirconia composition, zirconia pre-sintered body and zirconia sintered body, and dental product
AssigneeKuraray Noritake Dental Inc.
InventorsYoshihisa ITO, Atsushi Matsumoto, Tomohiro Emoto
Life of this patent
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Abstract
Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.
Claims30
1-3. (canceled)
4:
- A zirconia sintered body, comprising:
- at least two coloring agents selected from the group consisting of
- a coloring agent A:
- erbium oxide,
- a coloring agent B:
- nickel oxide,
- a coloring agent C:
- a composite oxide of zirconium and vanadium,
- a coloring agent D:
- a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
- a coloring agent E:
- a composite oxide of zirconium, silicon, cobalt and nickel.
9 more elements
5:
- The zirconia sintered body according to claim 4, comprising:
- at least one of the coloring agent A, the coloring agent B and the coloring agent C;
- and
- at least one of the coloring agent D and the coloring agent E.
1 more element
6:
- The zirconia sintered body according to claim 4, comprising:
- 0.005 to 0.02 mass % of the coloring agent C;
- and
- 0.06 to 0.08 mass % of the coloring agent E.
1 more element
7:
- The zirconia sintered body according to claim 4, comprising:
- 0.07 to 0.09 mass % of the coloring agent C;
- and
- 0.05 to 0.2 mass % of the coloring agent D.
1 more element
8:
- The zirconia sintered body according to claim 4, comprising:
- 0.007 to 0.06 mass % of the coloring agent B;
- and
- 0.01 to 0.06 mass % of the coloring agent D.
1 more element
9:
- The zirconia sintered body according to claim 4, comprising:
- 0.01 to 0.04 mass % of the coloring agent A;
- 0.05 to 0.07 mass % of the coloring agent C;
- and
- 0.05 to 0.08 mass % of the coloring agent D.
2 more elements
10:
- The zirconia sintered body according to claim 4, comprising:
- 0.002 to 0.3 mass % of the coloring agent A;
- 0.0005 to 0.03 mass % of the coloring agent B;
- 0.005 to 0.07 mass % of the coloring agent C;
- and
- 0.004 to 0.04 mass % of the coloring agent D.
3 more elements
11-13. (canceled)
14:
- A composition, comprising:
- zirconium oxide,
- yttrium oxide, and
- a coloring agent,
- wherein the coloring agent comprises at least two coloring agents selected from the group consisting of
- a coloring agent A:
- erbium oxide,
- a coloring agent B:
- nickel oxide,
- a coloring agent C:
- a composite oxide of zirconium and vanadium,
- a coloring agent D:
- a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
- a coloring agent E:
- a composite oxide of zirconium, silicon, cobalt and nickel.
12 more elements
15:
- The composition according to claim 14, comprising:
- at least one of the coloring agent A, the coloring agent B and the coloring agent C;
- and
- at least one of the coloring agent D and the coloring agent E.
1 more element
16:
- The composition according to claim 14, comprising:
- 0.02 to 0.03 mass % of the coloring agent C;
- and
- 0.06 to 0.08 mass % of the coloring agent E.
1 more element
17:
- The composition according to claim 14, comprising:
- 0.07 to 0.09 mass % of the coloring agent C;
- and
- 0.08 to 0.12 mass % of the coloring agent D.
1 more element
18:
- The composition according to claim 14, comprising:
- 0.007 to 0.06 mass of the coloring agent B;
- and
- 0.01 to 0.06 mass % of the coloring agent D.
1 more element
19:
- The composition according to claim 14, comprising:
- 0.01 to 0.04 mass % of the coloring agent A;
- 0.05 to 0.07 mass % of the coloring agent C;
- and
- 0.05 to 0.08 mass % of the coloring agent D.
2 more elements
20:
- The composition according to claim 14, comprising:
- 0.002 to 0.3 mass % of the coloring agent A;
- 0.0005 to 0.03 mass % of the coloring agent B;
- 0.005 to 0.07 mass % of the coloring agent C;
- and
- 0.004 to 0.04 mass % of the coloring agent D.
3 more elements
21:
- A pre-sintered body, produced by firing a composition according to claim 14 at 800° C. to 1200° C.
22:
- A zirconia sintered body, produced by firing a composition according to claim 14 at 1300° C. to 1600° C.
23-25. (canceled)
26:
- A pre-sintered body, comprising:
- zirconium oxide,
- yttrium oxide, and
- a coloring agent,
- wherein the coloring agent comprises at least two coloring agents selected from the group consisting of
- a coloring agent A:
- erbium oxide,
- a coloring agent B:
- nickel oxide,
- a coloring agent C:
- a composite oxide of zirconium and vanadium,
- a coloring agent D:
- a mixture of a composite oxide of iron, cobalt and chromium, a composite oxide of zirconium and silicon, silicon dioxide and nickel oxide, and
- a coloring agent E:
- a composite oxide of zirconium, silicon, cobalt and nickel.
12 more elements
27:
- The pre-sintered body according to claim 26, comprising:
- at least one of the coloring agent A, the coloring agent B and the coloring agent C;
- and
- at least one of the coloring agent D and the coloring agent E.
1 more element
28:
- The pre-sintered body according to claim 26, comprising:
- 0.02 to 0.03 mass % of the coloring agent C;
- and
- 0.06 to 0.08 mass % of the coloring agent E.
1 more element
29:
- The pre-sintered body according to claim 26, comprising:
- 0.07 to 0.09 mass % of the coloring agent C;
- and
- 0.08 to 0.12 mass % of the coloring agent D.
1 more element
30:
- The pre-sintered body according to claim 26, comprising:
- 0.007 to 0.06 mass % of the coloring agent B;
- and
- 0.01 to 0.06 mass % of the coloring agent D.
1 more element
31:
- The pre-sintered body according to claim 26, comprising:
- 0.01 to 0.04 mass % of the coloring agent A;
- 0.05 to 0.07 mass % of the coloring agent C;
- and
- 0.05 to 0.08 mass % of the coloring agent D.
2 more elements
32:
- The pre-sintered body according to claim 26, comprising:
- 0.002 to 0.3 mass % of the coloring agent A;
- 0.0005 to 0.03 mass % of the coloring agent B;
- 0.005 to 0.07 mass % of the coloring agent C;
- and
- 0.004 to 0.04 mass % of the coloring agent D.
3 more elements
33:
- A zirconia sintered body, produced by firing a pre-sintered body according to claim 26 at 1300° C. to 1600° C.
34:
- A dental product, comprising a zirconia sintered body according to claim 4.
35:
- The dental product according to claim 34, further comprising a porcelain layer laminated on the zirconia sintered body,
- wherein the porcelain layer comprises an anti-yellowing material.
36:
- The dental product according to claim 35, wherein the anti-yellowing material comprises at least one of an antimony compound and a cerium compound.