Method for preparing ceramic material

Patent metadata

Field	Value
Publication number	US-11465911-B2
Application number	US-202016892581-A
Country	US
Kind code	B2
Filing date	Jun 4, 2020
Priority date	Jul 30, 2019
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

Disclosed are a method for preparing a ceramic material including a compound of a formula of A2BxOy and a ceramic material prepared by the method. The method includes: mixing a first oxide of AOm and a second oxide of BOn to obtain a mixture, ball-milling the mixture until a particle size of the mixture is not greater than 1 μm with a medium selected from a group consisting of ethanol, acetone, deionized water and a combination thereof, to obtain a powder, drying the powder at a temperature in a range of 60 to 80° C., and sintering the powder with a laser irradiation having a laser wavelength of 980 nm, an irradiation power ranging from 50 to 1500 W and an irradiation period of 3 s to 8 min to obtain the ceramic material.

First claim

What is claimed is:

1. A method for preparing a ceramic material comprising a compound of a formula of A 2 B x O y , where A is at least one of Sc, Y, La, Nd, Eu, Gd, Dy, Er, Yb and Lu, B is at least one of Ti, Zr, Ce and Hf, 2≤x≤10, 7≤y≤20, and 0.7≤y/x≤3.5, the method comprising:
mixing a first oxide of AO m and a second oxide of BO n to obtain a mixture,
ball-milling the mixture until a particle size of the mixture is not greater than 1 μm with a medium selected from a group consisting of ethanol, acetone, deionized water and a combination thereof, to obtain a powder,
drying the powder at a temperature in a range of 60 to 80° C., and
sintering the powder with a laser irradiation having a laser wavelength of 980 nm, an irradiation power ranging from 50 to 1500 W, a spot diameter ranging from 10 to 15 mm and an irradiation period of 3 s to 8 min to obtain the ceramic material.

2. The method according to claim 1 , wherein the ball-milling is performed at a ball-milling speed of 400 rpm for a period ranging from 8 to 24 h.

3. The method according to claim 1 , wherein after the powder is obtained, the method further comprises a granulation process comprising:
preparing an aqueous binder solution being of 1 to 10% of a binder by mass,
dividing the aqueous binder solution into 2 or 3 parts, adding the parts into the powder separately,
milling for 3 to 6 h, and
sieving with a 20 to 500 mesh screen.

4. The method according to claim 3 , wherein the milling includes manual grinding or ball-milling.

5. The method according to claim 3 , wherein the binder comprises at least one of polyvinyl alcohol, methoxysilane, polyurethane and silicone.

6. The method according to claim 3 , wherein the method further comprises:
removing the binder by heating or laser irradiation.

7. The method according to claim 6 , wherein the binder is removed by heating, and the heating is performed at a heating rate ranging from 1 to 5° C./min to a temperature in a range of 300 to 600° C., and the temperature is maintained for 10 to 24 h.

8. The method according to claim 6 , wherein the binder is removed by laser irradiation, and the laser irradiation has a power not greater than 30 W, a spot diameter ranging from 10 to 15 mm and an irradiation period ranging from 5 to 20 min.

9. The method according to claim 1 , wherein the method further comprises:
compacting the powder by a hydraulic process or an isostatic pressing process.

10. The method according to claim 9 , wherein the powder is compacted by a hydraulic process, and the hydraulic process has a pressure ranging from 2 and 15 MPa and a compacting time ranging from 3 to 10 s.

11. The method according to claim 9 , wherein the powder is compacted by an isostatic pressing process, and the isostatic pressing process has an isostatic pressure ranging from 100 to 300 MPa and a compacting time of 1 to 10 min.

12. The method according to claim 1 , wherein a molar ratio of the first oxide of AO m to the second oxide of BO n is in a range of 1:1 to 1:5.

13. The method according to claim 1 , wherein the ceramic material comprises a further compound different from the compound of the formula of A 2 B x O y .

14. The method according to claim 13 , wherein the further compound has a mass of 0.5 to 30 wt % based on a total weight of the first oxide of AO m and the second oxide of BO n .

15. The method according to claim 13 , wherein the further compound is SiO 2 .

16. The method according to claim 13 , wherein the further compound is LiF.

17. The method according to claim 1 , wherein the powder has a diameter distribution in a range of 10 nm to 1 μm.

18. The method according to claim 1 , wherein before the laser irradiation, the powder is applied on a substrate.

Assignees

• Chongqing Institute Of East China Normal Univ
• Univ East China Normal

Inventors

• Zeng Heping
• Huang Yanwei
• He Jiayang

Classifications

• C01P2004/03

  obtained by SEM · CPC title

• C01B33/20 Primary

  Silicates (persilicates C01B15/14 {; containing aluminium C01B33/26}) · CPC title

• C01P2006/32

  Thermal properties · CPC title

• H01M2300/0077

  based on zirconium oxide · CPC title

• H01M8/1253

  the electrolyte containing zirconium oxide · CPC title