Zirconia composition, zirconia semi-sintered body and zirconia sintered body, as well as dental product
AssigneeKuraray Noritake Dental Inc.
InventorsYoshihisa ITO, Yasutaka KUDO
Life of this patent
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Abstract
There are provided zirconia composition, zirconia semi-sintered body and zirconia sintered body, and dental product in which defect-generation is suppressed and transparency varies. The zirconia sintered body contains 4 mol % to 7 mol % of yttria as stabilizer. The zirconia sintered body contains shielding material. The zirconia sintered body comprises first region and second region having a higher content ratio of the shielding material than the first region. Difference between content ratio of yttria in the first region and that of yttria in the second region is 1 mol % or less.
Claims24
A partially stabilized zirconia sintered body, comprising 4 mol % to 7 mol % of yttria as a stabilizer,
- wherein
- the zirconia sintered body comprises a light shielding material,
- the zirconia sintered body has a first region, and a second region having a higher content ratio of the light shielding material than the first region, and
- a difference between a content ratio of yttria in the first region and a content ratio of yttria in the second region is 1 mol % or less.
A composition, wherein:
- the composition comprises a partially stabilized zirconia comprising 4 mol % to 7 mol % of yttria as a stabilizer and light shielding material,
- the composition has a first region and a second region having a higher content ratio of the light shielding material than the first region, and
- the light shielding material is at least one selected from a group consisting of silicon oxide, aluminium oxide, titanium oxide, and a complex oxide of zirconium and silicon.
15-18. (canceled)
A semi-sintered body, wherein:
- the semi-sintered body comprises a partially stabilized zirconia containing 4 mol % to 7 mol % of yttria as a stabilizer, and light shielding material,
- the semi-sintered body has a first region and a second region having a higher content ratio of the light shielding material than the first region, and
- the light shielding material is at least one selected from a group comprising silicon oxide, aluminium oxide, titanium oxide, and a complex oxide of zirconium and silicon.
(canceled)
-31. (canceled)
Dependencies are inferred from the claim text.