US 11,866,370 B2
Grain-grade zirconia toughened alumina ceramic substrate and method for preparing the same
Chongjun Wu, Henan (CN); Mingxin Duan, Henan (CN); and Yunpeng He, Henan (CN)
Assigned to Sinoceram Technology (zhengzhou) Co., Ltd., Zhengzhou (CN)
Filed by Sinoceram Technology (zhengzhou) Co., Ltd., Henan (CN)
Filed on Aug. 10, 2021, as Appl. No. 17/398,911.
Application 17/398,911 is a continuation of application No. PCT/CN2021/101514, filed on Jun. 22, 2021.
Prior Publication US 2022/0402821 A1, Dec. 22, 2022
Int. Cl. C04B 35/119 (2006.01); C04B 35/488 (2006.01); C04B 35/10 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01); C04B 35/64 (2006.01)
CPC C04B 35/10 (2013.01) [C04B 35/6261 (2013.01); C04B 35/6264 (2013.01); C04B 35/6342 (2013.01); C04B 35/64 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/3246 (2013.01); C04B 2235/6025 (2013.01); C04B 2235/6567 (2013.01)] 5 Claims
OG exemplary drawing
 
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.