Patents by Inventor Dexian Zhu

Dexian Zhu 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).

  • Patent number: 7232780
    Abstract: The invention presents yttria elements containing high-density chrome based refractory composites, which consist of: (A) Fused polymeric compound as aggregate, containing: 40 to 50 wt % of particles in size from 1 to 4 mm and 15 to 25 wt % of particles in size below 1 mm; (B) A matrix consisting of fused polymeric compounds with particle sizes below 66 ?m, active sintered Al2O3, active industrial Cr2O3 and Y2O3, (C) Binders accounting for 2.5 to 3.5 wt %. Since Y2O3 has resistance to the slag corrosion and penetration with its compatibility with slag, it has been introduced to activate the major component Cr2O3 crystal lattice in favor with Al2O3 so that it helps to reduce the sintering temperature, increase the rate of finished products as well as reduce the manufacturing cost.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: June 19, 2007
    Assignee: Luoyang Institute of Refractories Research, China Iron & Steel Industry & Trade Group Corporation
    Inventors: Dexian Zhu, Fei Shi, RenPin Chen, Hongda Zhang, Yadong Zhang
  • Publication number: 20050245387
    Abstract: The invention presents yttira elements containing high-density chrome based refractory composites, which consist of: (A) Fused polymeric compound as aggregate, containing: 40 to 50 wt % of particles in size from 1 to 4 mm and 15 to 25 wt % of particles in size below 1 mm; (B) A matrix consisting of fused polymeric compounds with particle sizes below 66 ?m, active sintered Al2O3, active industrial Cr2O3 and Y2O3. (C) Binders accounting for 2.5 to 3.5 wt %. Since Y2O3 has resistance to the slag corrosion and penetration with its compatibility with slag, it has been introduced to activate the major component Cr2O3 crystal lattice in favor with Al2O3 so that it helps to reduce the sintering temperature, increase the rate of finished products as well as reduce the manufacturing cost.
    Type: Application
    Filed: October 15, 2004
    Publication date: November 3, 2005
    Inventors: Dexian Zhu, Fei Shi, Renpin Chen, Hongda Zhang, Yadong Zhang