Conductive metal pigments
AssigneeUop LLC
InventorsKarl J. Youtsey, Steven A. Bradley
Life of this patent
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Abstract
Conductive metal pigments which may be used in electrical devices are prepared by forming an alloy of a non-noble conductive metal and at least one oxidizable material, mixing the resulting alloy with a vitreous frit and an organic vehicle to form an ink, screening said ink onto a substrate, firing the alloy in an air atmosphere at a temperature in excess of about 500.degree. C. and cooling the ink to produce a conductive pigment. The oxidizable material is preferentially oxidized during the firing with a concomitant non-oxidation of the non-noble conductive metal.
Claims11
A process for the preparation of a conductive pigment coated surface which comprises alloying a non-noble conductive metal with at least one oxidizable material selected from the group consisting of carbon, boron, silicon, carbon-silicon, and boron-silicon, mixing the resulting alloy with a vitreous frit and an organic vehicle to form an ink, screening said ink onto a substrate, thereafter firing said ink in an oxidizing atmosphere containing at least 20% by volume of oxygen at a temperature in excess of about 500.degree. C. for a period of time sufficient to oxidize said oxidizable material without oxidation of said non-noble metal, cooling the thus fired product to produce a conductive pigment coated surface.
Dependencies are inferred from the claim text.