Oxygen sensor and process for producing same

Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering

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Details

204421, 204424, 20419212, 427124, 427125, 4273722, 427377, 427380, 4273835, C23C 1418, B05D 500, B05D 302, G01N 2746

Patent

active

046558926

ABSTRACT:
An oxygen sensor for sensing the oxygen content of an exhaust gas from an automotive engine and a process for producing the same, which sensor is less sensitive to lead poisoning than conventional sensors. In the inventive sensor, a first platinum electrode is formed on the side of a solid electrolyte body exposed to the gas to be detected, and a second electrode is formed on the other side of the electrolyte body. The first electrode comprises a platinum layer and a layer of at least one of rhodium and palladium. Preferably, the layer of rhodium or palladium has a thickness of 10 to 5,000 .ANG..

REFERENCES:
patent: 4186071 (1980-01-01), Romine et al.
patent: 4199425 (1980-04-01), Sinkevitch
patent: 4225559 (1980-09-01), Achari et al.
patent: 4253934 (1981-03-01), Berg et al.
patent: 4294668 (1981-10-01), Young

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