US 12,371,381 B2
High-strength prestressed composite ceramic and preparation method thereof
Yiwang Bao, Beijing (CN); Fenghua Kuang, Beijing (CN); Hongbo Zhang, Beijing (CN); and Detian Wan, Beijing (CN)
Assigned to China Building Material Test & Certification Group Co., Ltd., Beijing (CN); and China Building Materials Academy Co., Ltd., Beijing (CN)
Filed by China Building Material Test & Certification Group Co., Ltd., Beijing (CN); and China Building Materials Academy Co., Ltd., Beijing (CN)
Filed on Aug. 22, 2020, as Appl. No. 17/000,311.
Application 17/000,311 is a continuation of application No. PCT/CN2019/076052, filed on Feb. 25, 2019.
Claims priority of application No. 201810159609.1 (CN), filed on Feb. 26, 2018; and application No. 201811030015.7 (CN), filed on Sep. 5, 2018.
Prior Publication US 2021/0130239 A1, May 6, 2021
Int. Cl. C04B 35/10 (2006.01); C04B 35/64 (2006.01); C04B 41/00 (2006.01); C04B 41/45 (2006.01); C04B 41/50 (2006.01); C04B 41/87 (2006.01)
CPC C04B 35/10 (2013.01) [C04B 35/64 (2013.01); C04B 41/0081 (2013.01); C04B 41/009 (2013.01); C04B 41/4578 (2013.01); C04B 41/5032 (2013.01); C04B 41/87 (2013.01); C04B 2235/3217 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A high-strength prestressed composite ceramic, characterized in that, the prestressed ceramic comprises a multilayer structure formed by a matrix and a surface layer; an expansion coefficient of a surface layer material constituting the surface layer is lower than that of a matrix material constituting the matrix; an elastic modulus of the surface layer material is not lower than that of the matrix material; and the matrix is coated with the surface layer; a sectional area ratio of the matrix to the surface layer is 0.1-2500; the surface layer material and the matrix material are different and independently selected from alumina, cordierite, mullite, and magnesia alumina spinel.