Patent ID: 11866370
Assignee: SINOCERAM TECHNOLOGY (ZHENGZHOU) CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A grain-grade zirconia toughened alumina ceramic substrate, wherein the grain-grade zirconia toughened alumina ceramic substrate is prepared from a main phase material and a secondary phase material in a solvent in the presence of a sintering aid, a dispersant, a binder and a plasticizer;
the main phase material is an alumina powder;
the secondary phase material is a zirconia powder;
the sintering aid is a magnesia-alumina spinel powder;
the solvent is a binary azeotrope of anhydrous ethanol and butanone;
the dispersant is a phosphate ester;
the binder is polyvinyl butyral;
the plasticizer is dibutyl phthalate;
the alumina powder accounts for 82.44-96.7% of a total volume of the alumina powder and the zirconia powder, and the zirconia powder accounts for 3.30-17.56% of the total volume of the alumina powder and the zirconia powder;
a weight of the magnesia-alumina spinel powder is 0.1-4.0% of a total weight of the alumina powder and the zirconia powder;
the alumina powder, the zirconia powder and the magnesia-aluminum spinel powder constitute an inorganic powder;
the binary azeotrope of anhydrous ethanol and butanone is 20-35% by weight of the inorganic powder;
the phosphate ester is 0.5-2.0% by weight of the inorganic powder;
the polyvinyl butyral is 5-15% by weight of the inorganic powder;
the dibutyl phthalate is 2-6% by weight of the inorganic powder; and
in a microstructure of the grain-grade zirconia toughened alumina ceramic substrate, a grain size ratio of an alumina grain to a zirconia grain is 2.145-4.444.