Patents Represented by Law Firm Keil & Wenkauf
  • Preparation of very strong pore-free ceramic silicon carbide moldings stable at high temperature
    Patent number: 4839119
    Abstract: Compact pore-free silicon carbide moldings are produced by compressing amorphous silicon carbide powder in the absence of sintering assistants at from 1400.degree. to 1800.degree. C. and under from 100 to 2000 kp/cm .sup.2 to give dense, glassy moldings. In a subsequent stage the resulting glassy moldings are converted into crystalline .alpha.-silicon carbide at from 1950.degree. to 2200.degree. C.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: June 13, 1989
    Assignee: BASF Aktiengesellschaft
    Inventor: Hans-Josef Sterzel