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Method for producing sintered metalized aluminum nitride ceramic bodies

  • US 4,818,626 A
  • Filed: 08/03/1987
  • Issued: 04/04/1989
  • Est. Priority Date: 09/04/1986
  • Status: Expired due to Fees
First Claim
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1. A method for producing a sintered metalized aluminum nitride ceramic body, comprising the steps of:

  • applying, onto a green aluminum nitride ceramic body, a metalizing paste comprised of about 50 to 90% of an inorganic component which comprises 90 to 99% by weight of powdered metalizing agent selected from the group consisting of tungsten, molybdenum, hafnium nitride, zirconium nitride and titanium nitride and 1 to 10% by weight of a powdered mixture comprising 5 to 95% by weight of aluminum nitride and 5 to 50% by weight of a rare earth metal oxide which is dispersed in an amount of about 10 to about 50% of anorganic vehicle to form the metalizing paste;

    thereafterdrying the metalizing paste; and

    thereaftersintering the metalizing paste and the green ceramic body by heating to a temperature of from about 1750°

    C. to about 2000°

    C. in a nitrogen or nitrogen-hydrogen mixture atmosphere to convert the metalizing paste and the green ceramic body into said sintered metalized aluminum nitride body.

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