| 摘要 |
<p>In a method for heat processing a ceramic article on which has been printed a conductive or dielectric layer from a photo-imageable paste including an organic binder, an inorganic binder, a plasticiser, a photo-initiation system and a photo-hardenable monomer, after application of radiation to polymerise the monomer, and drying of the layer, the article is subjected to heating first to remove organics, and then to sinter the residual components of the layer. Water vapour is present in the sintering atmosphere in an amount of from about 0.25% to about 2% by volume of the gaseous atmosphere at at least the sintering stage, and preferably at both the binder burn-out stage and the sintering stage. Up to about 10 ppm, and preferably from about 2 ppm to about 3 ppm by volume H2 may be included, the balance of the atmosphere being nitrogen. Conductive ceramic articles heat treated with this atmosphere exhibit a combination of improved properties, including acceptable cohesion of the metallic pattern and adhesion thereof to the ceramic substrate, in combination with improved conductivity. <IMAGE></p> |
