Ceramic and method for preparing the same

Patent metadata

Field	Value
Publication number	US-10047011-B2
Application number	US-201615192721-A
Country	US
Kind code	B2
Filing date	Jun 24, 2016
Priority date	Dec 30, 2013
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A ceramic and a method for preparing a ceramic are provided. The ceramic includes an alumina and an oxygen-containing compound of strontium having a perovskite structure.

First claim

What is claimed is:

1. A ceramic comprising an alumina and an oxygen-containing compound of strontium having a perovskite structure,
wherein the oxygen-containing compound of strontium comprises at least one of Sr a A b O c and Sr x E y O z , where A represents at least one of tantalum and niobium; E represents at least one selected from a group consisting of cobalt, iron and manganese.

2. The ceramic of claim 1 , wherein a ranges from 1.5 to 2.5, b ranges from 1.5 to 2.5, c ranges from 6.5 to 7.5, y ranges from 0.9 to 1.1, and z ranges from 2.7 to 3.3.

3. The ceramic of claim 1 , wherein a red-green value of the ceramic ranges from 0.06 to 0.07, and a blue-yellow value ranges from 0.032 to −0.02.

4. The ceramic of claim 1 , wherein a luminosity value L of the ceramic ranges from 43 to 44.

5. The ceramic of claim 1 , wherein a toughness of the ceramic is in a range of 6 MPa m½ to 8 MPa m½.

6. A ceramic comprising an alumina and an oxygen-containing compound of strontium having a perovskite structure that is obtained by the method comprising:
providing a first uniform slurry of a basis material, an additive, a flexibilizer, a black stain and a sintering aid in an organic solvent;
providing a second uniform slurry of the organic solvent and a binder;
drying the second slurry to form a spherical powder; and
dry pressing and sintering the spherical powder to form the ceramic, wherein the basis material comprises alumina, the additive comprises strontium carbonate, and an oxygen-containing compound of strontium having a perovskite structure is obtainable by a reaction of the additive with at least one of the flexibilizer and the black stain during the sintering process,
wherein the oxygen-containing compound of strontium comprises at least one of Sr a A b O c and Sr x E y O z , where A represents at least one of tantalum and niobium; E represents at least one selected from a group consisting of cobalt, iron and manganese.

Assignees

• Byd Co Ltd

Inventors

• Chen Ge
• Lin Yongzhao
• Lin Xinping

Classifications

• C04B2235/604

  Pressing at temperatures other than sintering temperatures · CPC title

• C04B2235/3274

  Ferrites · CPC title

• C04B2235/3275

  Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite · CPC title

• C04B35/117 Primary

  Composites · CPC title

• C04B2235/3255

  Niobates or tantalates, e.g. silver niobate · CPC title