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US 10,280,120 B2Granted
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.
Claims27
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.
8 more elements
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
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
Dependencies are inferred from the claim text.