Method for producing porous cermet electrode of sensor element of electro chemical gas sensor that is utilized for detecting e.g. nitrogen oxide in exhaust gas of internal combustion engine, involves sintering electrode material mixture

摘要

The method involves coating porosity particles e.g. carbon fibers, with metallic electrode material, and producing electrode paste with the metallic electrode material, ceramic electrode material and the coated particles. A shape of electrodes (15-19) is formed with the produced electrode material mixture, and the produced and shaped mixture is sintered, where the metallic electrode material contains platinum, rhodium, ruthenium, palladium, gold, silver or copper, and the ceramic electrode material contains doped zirconium oxide or doped ceroxide. An independent claim is also included for a porous cermet electrode comprising a metallic electrode material made of rhodium or platinum alloy, and a ceramic electrode material made of doped yttrium zirconium oxide.