Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1980-01-25
1981-06-09
Tung, T.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
204 1T, G01N 2746
Patent
active
042723493
ABSTRACT:
An oxygen sensor with an oxygen sensor element having an outer protective layer of alumina, acting as getters with respect to catalyst poisons, particularly phosphorus, in exhaust gases, formed on the outer surface of a catalyst layer of platinum or a mixture of platinum and rhodium which is coated on an electrode protective layer provided on the outer electrode of an oxygen sensor element. Such an outer protective layer is additionally provided on the inner wall of the inner louver of the oxygen sensor having a double louver structure. A method of manufacturing an oxygen sensor with an oxygen sensor element comprising the steps of coating such an outer alumina protective layer onto the outer surface of said catalyst layer formed on an electrode protective layer provided onto the outer electrode of an oxygen sensor element and additionally coating such an alumina protective layer onto the inner wall of the inner louver of an oxygen sensor having a double louver structure.
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Furutani Toshinobu
Matsumoto Shin-ichi
Otsuka Yasuhiro
Shinohara Hiroshi
Wakisaka Hiroshi
Toyota Jidosha Kogyo Kabushiki Kaisha
Tung T.
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