Translucent zirconia sintered body and zirconia powder, and use therefor
US-2016310245-A1 · Oct 27, 2016 · US
Zirconia composition, pre-sintered body and sintered body, and method of producing the same
US11535564B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11535564-B2 |
| Application number | US-201716334499-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 20, 2017 |
| Priority date | Sep 20, 2016 |
| Publication date | Dec 27, 2022 |
| Grant date | Dec 27, 2022 |
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- Title
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Abstract
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A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.
First claim
Opening claim text (preview).
What is claimed is: 1. A zirconia pre-sintered body in which a zirconia powder is not sintered yet but solidified, wherein the pre-sintered body comprises yttria, 55% or more of the zirconia is monoclinic, at least a portion of yttria does not form a solid solution with the zirconia, the zirconia pre-sintered body comprises 3 mol % to 7.5 mol % of yttria based on a total amount of moles of zirconia and yttria, a mixture of zirconia and yttria for producing the zirconia pre-sintered body is not fired at a temperature of 700° C. or higher before producing the zirconia pre-sintered body, and when a first translucency and a second translucency are compared, the first translucency is 85% or more of the second translucency, the first translucency being of a first sintered body produced by firing the pre-sintered body for 30 minutes at a temperature of 1550° C., and the second translucency being of a second sintered body produced by firing the pre-sintered body for 120 minutes at a temperature of 1550° C.
Assignees
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Classifications
Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying · CPC title
Density · CPC title
Composite crowns · CPC title
Optical properties · CPC title
Tetragonal symmetry · CPC title
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Frequently asked questions
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- What does patent US11535564B2 cover?
- A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.
- Who is the assignee on this patent?
- Kuraray Noritake Dental Inc
- What technology area does this patent fall under?
- Primary CPC classification C04B35/486. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 27 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).