Patents Assigned to Kabushiki Kaisha Toyota Chuo Kenkysusho
  • Method for producing a sintered silicon nitride base ceramic and said ceramic
    Patent number: 3950464
    Abstract: A silicon nitride based ceramic is formed of silicon nitride and at least two metal oxides of such a type that when the metal oxides are heated separately they form a spinel. Combination of said metal oxides and said silicon nitride as fine powders and sintering same at a specified temperature for a specified period of time results in a silicon nitride based ceramic having improved mechanical and chemical properties.
    Type: Grant
    Filed: October 23, 1973
    Date of Patent: April 13, 1976
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkysusho
    Inventor: Hideyuki Masaki