Patents by Inventor Mingxin Duan

Mingxin Duan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Grain-grade zirconia toughened alumina ceramic substrate and method for preparing the same
    Patent number: 11866370
    Abstract: A grain-grade zirconia toughened alumina ceramic substrate and a method for preparing the same. The ceramic substrate is prepared from alumina power (main phase) and zirconia powder (secondary phase) in a binary azeotrope of anhydrous ethanol and butanone in the presence of magnesia-alumina spinel powder (as sintering aid), phosphate ester (as dispersant), polyvinyl butyral (as binder) and dibutyl phthalate (as plasticizer). In a mixture of the alumina power and the zirconia powder, a volume percentage of the alumina power is 82.44-96.7%, and a volume percentage of the zirconia powder is 3.30-17.56%. The magnesia-alumina spinel powder is 0.1-4.0% by weight of the mixture of the alumina power and the zirconia powder. A particle size ratio of the alumina powder to the zirconia powder is 2.415-4.444.
    Type: Grant
    Filed: August 10, 2021
    Date of Patent: January 9, 2024
    Assignee: Sinoceram Technology (zhengzhou) Co., Ltd.
    Inventors: Chongjun Wu, Mingxin Duan, Yunpeng He
  • GRAIN-GRADE ZIRCONIA TOUGHENED ALUMINA CERAMIC SUBSTRATE AND METHOD FOR PREPARING THE SAME
    Publication number: 20220402821
    Abstract: A grain-grade zirconia toughened alumina ceramic substrate and a method for preparing the same. The ceramic substrate is prepared from alumina power (main phase) and zirconia powder (secondary phase) in a binary azeotrope of anhydrous ethanol and butanone in the presence of magnesia-alumina spinel powder (as sintering aid), phosphate ester (as dispersant), polyvinyl butyral (as binder) and dibutyl phthalate (as plasticizer). In a mixture of the alumina power and the zirconia powder, a volume percentage of the alumina power is 82.44-96.7%, and a volume percentage of the zirconia powder is 3.30-17.56%. The magnesia-alumina spinel powder is 0.1-4.0% by weight of the mixture of the alumina power and the zirconia powder. A particle size ratio of the alumina powder to the zirconia powder is 2.415-4.444.
    Type: Application
    Filed: August 10, 2021
    Publication date: December 22, 2022
    Inventors: Chongjun Wu, Mingxin Duan, Yunpeng He