Ceramic and preparation method therefor

Patent metadata

Field	Value
Publication number	US-10106465-B2
Application number	US-201515533563-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Dec 8, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A ceramic and a preparation method therefor are provided. The ceramic includes a zirconia matrix, and an additive dispersed inside and on an outer surface of the zirconia matrix. The additive is an oxide including elements A and B, where A is selected from at least one of Ca, Sr, Ba, Y, and La, and B is selected from at least one of Cr, Mn, Fe, Co, and Ni.

First claim

What is claimed is:

1. A ceramic, comprising:
a zirconia matrix; and
an additive, the additive being dispersed inside and on an outer surface of the zirconia matrix, and the additive being an oxide comprising elements A and B;
wherein A is selected from at least one of Ca, Sr, Ba, Y, and La, and B is selected from at least one of Co, and Ni.

2. The ceramic according to claim 1 , wherein a chemical composition of the additive is AxByOz, x, y and z are atomic percentages, and x is 0.5 to 2, y is 0.5 to 2, and z is 3 to 5.

3. The ceramic according to claim 1 , wherein an average particle size of the additive is 0.5 to 10 micrometers.

4. The ceramic according to claim 3 , wherein the average particle size of the additive is 1 to 7 micrometers.

5. The ceramic according to claim 1 , further comprising:
a sintering aid, wherein the sintering aid is selected from at least one of Ta 2 O 5 , Nb 2 O 5 , CuO, ZnO, and TiO 2 .

6. The ceramic according to claim 5 , wherein based on a total weight of the zirconia matrix, a content of the sintering aid is 0.1 to 5 weight %.

7. The ceramic according to claim 1 , wherein based on the total weight of the zirconia matrix, a content of the additive is 1 to 10 weight %.

8. The ceramic according to claim 1 , wherein toughness of the ceramic is 10 to 12 MPa m 1/2 .

9. The ceramic according to claim 1 , wherein a red-green value a of the ceramic is 0.06 to 0.07, a blue-yellow value b is −0.02 to −0.03, and an intensity L of surface reflection light is 42 to 44.

Assignees

• Byd Co Ltd

Inventors

• Gong Qing
• Lin Xinping
• Chen Ge
• Lin Yongzhao
• Wu Bo

Classifications

• C04B35/6303

  Inorganic additives · CPC title

• C04B2235/3232

  Titanium oxides or titanates, e.g. rutile or anatase · CPC title

• C04B2235/3274

  Ferrites · CPC title

• C04B2235/5445

  submicron sized, i.e. from 0,1 to 1 micron · CPC title

• C04B2235/3284

  Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof · CPC title