Patents Assigned to Iwao Yamai
  • Low thermal expansion ceramic material
    Patent number: 4751206
    Abstract: A low thermal expansion potassium zirconium phosphate is formulated using a metal oxide as a densifier. A mixture of these powders is sintered and quenched.
    Type: Grant
    Filed: March 11, 1987
    Date of Patent: June 14, 1988
    Assignee: Iwao Yamai
    Inventors: Iwao Yamai, Toshitaka Oota