Stabilized zirconia sintered body and zirconia powder

Patent metadata

Field	Value
Publication number	US-12358841-B2
Application number	US-202117767376-A
Country	US
Kind code	B2
Filing date	Jan 12, 2021
Priority date	Jan 27, 2020
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

Provided is a stabilized zirconia sintered body which comprises a fluorescent agent containing zirconium and titanium, and shows fluorescence when irradiated with light including light of a wavelength of 250 nm to 380 nm.

First claim

The invention claimed is:

1. A stabilized zirconia sintered body comprising a fluorescent agent containing zirconium and titanium, wherein
the stabilized zirconia sintered body exhibits fluorescence in response to an irradiation with light including light having a wavelength of 250 nm or more and 380 nm or less, and
the fluorescent agent has a crystallite diameter of 40 nm or more and 65 nm or less.

2. The stabilized zirconia sintered body according to claim 1 , wherein
the stabilized zirconia sintered body contains stabilized zirconia, and
a content of the fluorescent agent is 0.01 mass % or more and 5 mass % or less where an entire amount of the stabilized zirconia is 100 mass %.

3. The stabilized zirconia sintered body according to claim 2 , wherein the content of the fluorescent agent is 0.1 mass % or more and 2 mass % or less where the entire amount of the stabilized zirconia is 100 mass %.

4. The stabilized zirconia sintered body according to claim 1 , wherein the stabilized zirconia sintered body emits light having an emission peak in a wavelength region of 400 nm or more and less than 600 nm in response to an irradiation with light including light having a wavelength of 250 nm or more and 380 nm or less.

5. The stabilized zirconia sintered body according to claim 1 , wherein the fluorescent agent contains 90 mass % or more of zirconium oxide and 0.1 mass % or more and 5 mass % or less of titanium oxide where an entire amount of the fluorescent agent is 100 mass %.

6. The stabilized zirconia sintered body according to claim 1 , wherein the stabilized zirconia sintered body has a relative sintered density of 99.5% or more.

7. The stabilized zirconia sintered body according to claim 1 , wherein
the stabilized zirconia sintered body comprises a stabilizer, and
the stabilizer is one or more compounds selected from the group consisting of Y 2 O 3 , Sc 2 O 3 , CaO, MgO, Er 2 O 3 , and Yb 2 O 3 .

8. The stabilized zirconia sintered body according to claim 7 , wherein
the stabilized zirconia sintered body comprises stabilized zirconia,
the stabilizer is Y 2 O 3 , and
a content of Y 2 O 3 based on the entire amount of the stabilized zirconia is 1.8 mol % or more and 7 mol % or less.

9. The stabilized zirconia sintered body according to claim 1 , wherein
the stabilized zirconia sintered body contains aluminum oxide, and
a content of the aluminum oxide is 2 mol % or more and less than 50 mol % where an entire amount of the stabilized zirconia sintered body is 100 mol %.

10. The stabilized zirconia sintered body according to claim 1 , wherein the stabilized zirconia sintered body contains one or more elements selected from the group consisting of Fe, V, Er, Mn, Co, Cr, Si, Ti, Zn, and Nb.

11. A zirconia powder comprising:
stabilized zirconia particles, and
a fluorescent agent containing zirconium and titanium, wherein
a content of the fluorescent agent is 0.01 mass % or more and 5 mass % or less where an entire amount of the stabilized zirconia particles is 100 mass %, and
the fluorescent agent has a crystallite diameter of 40 nm or more and 65 nm or less.

12. The zirconia powder according to claim 11 , wherein the content of the fluorescent agent is 0.1 mass % or more and 2 mass % or less where the entire amount of the stabilized zirconia particles is 100 mass %.

13. The zirconia powder according to claim 11 , wherein the fluorescent agent contains 90 mass % or more of zirconium oxide and 0.1 mass % or more and 5 mass % or less of titanium oxide where an entire amount of the fluorescent agent is 100 mass %.

14. The zirconia powder according to claim 11 , wherein the fluorescent agent has an average particle diameter of 1 μm or more and 20 μm or less.

15. The zirconia powder according to claim 11 , wherein
the zirconia powder contains aluminum oxide, and
a content of the aluminum oxide is 2 mol % or more and less than 50 mol % where an entire amount of the zirconia powder is 100 mol %.

16. The zirconia powder according to claim 11 , wherein
the zirconia powder contains a stabilizer, and
the stabilizer is one or more compounds selected from the group consisting of Y 2 O 3 , Sc 2 O 3 , CaO, MgO, Er 2 O 3 , and Yb 2 O 3 .

17. The zirconia powder according to claim 16 , wherein
the stabilizer is Y 2 O 3 , and
a content of Y 2 O 3 based on the entire amount of the stabilized zirconia particles is 1.8 mol % or more and 7 mol % or less.

18. The zirconia powder according to claim 11 , wherein the zirconia powder contains one or more elements selected from the group consisting of Fe, V, Er, Mn, Co, Cr, Si, Ti, Zn, and Nb.

Assignees

• Daiichi Kigenso Kagaku Kogyo

Inventors

• Takai Masayuki
• Kanenishi Keita

Classifications

• C04B2235/5454

  nanometer sized, i.e. below 100 nm · CPC title

• C04B35/49

  containing also titanium oxides or titanates · CPC title

• C09K11/67 Primary

  containing refractory metals · CPC title

• C09K11/671

  Chalcogenides · CPC title

• C09K11/02

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title