Patents Assigned to Syowa Denko K.K.
  • Sintered silicon carbide with graphite added thereto, sintered composite containing the same, and mechanical seal
    Patent number: 5998318
    Abstract: There is provided a sintered silicon carbide with graphite added thereto having excellent lubrication characteristics. The sintered silicon carbide with graphite added thereto contains 10-30 wt. % of natural graphite flakes having an average grain size of 8-100 .mu.m and the remainder silicon carbide and a sintering aid, and having a relative density of 80-92%.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: December 7, 1999
    Assignees: Tanken Seal Seiko Co., Ltd., Syowa Denko K.K.
    Inventors: Hiroshi Takanami, Yukio Ishii, Mamoru Asuwa