Process for producing a metal-coated, metallized component of aluminum nitride ceramic and metal-coated component obtained thereby

摘要

The invention relates to a process for producing a metal- coated, metallized component of aluminum nitride ceramic in the steps: P P preparation of a metallizing paste comprising a pulverulent glass of the MnO--Al.sub.2 O.sub.3 --SiO.sub.2 system and a refractory metal powder, PPapplication of the metallizing paste to the component surface,P Pfiring the component coated with metallizing paste at a temperature 1100° C. under a reducing moist gas atmosphere of hydrogen- containing nitrogen,P P coating the metallized component with metal by means of metal plating, PPwherein, during the heating up of the ceramic component coated with metallizing paste, the atmosphere is humidified with water vapor so that the water vapor content in the temperature range between 800° C. and 1050° C. corresponds to a dew point of 295 K and the water vapor content outside this temperature range corresponds to a dew point of 295 K.PPThe invention also relates to a metallizing paste comprising a adhesion promotor of glass powder having a mean particle size of 2-15 &mgr;m, a refractory metal powder having a mean particle size of 1-4 &mgr;m and an organic resin dissolved in a suitable solvent or/and a screen printing oil, wherein the metallizing paste for application to the component by means of screen printing has a viscosity of 50-100 Pa·s and for application by dipping has a viscosity of 5 Pa·s.