Patents Examined by Martha Rachuba
  • Ceramic articles, and a process for the production thereof
    Patent number: 5070658
    Abstract: A ceramic sealing component for a machine which is in frictional contact and has at least one non-reflective sliding and sealing face of a mean roughness (Ra) greater than 0.1 and a minimum of 0.8 .mu.m is described. A component of this type can be produced by subjecting a green ceramic article to shaping, sintering, processing by face-grinding or round-grounding, optionally washing and then abrasive-polishing in the presence of an aqueous phase until the mean roughness desired for the machine component is reached.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: December 10, 1991
    Assignee: Hoechst CeramTec Aktiengesellschaft
    Inventors: Walter Rajner, Klaus Russner