Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1994-09-14
1995-12-05
Tung, T.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204421, 204427, 427 58, 427125, 4271263, 4271264, G01N 27409
Patent
active
054725917
ABSTRACT:
An oxygen concentration detector provides high durability by increasing the thermal stability of coating layers applied to an electrode face thereof. A catalyst layer is formed on an outer surface of an electrode at the analysis gas side of a partition wall made of an ion oxygen conductive ceramic for generating electromotive force according to the difference between the concentration of oxygen in the analysis gas and the concentration of oxygen in the reference gas. The catalyst layer is composed of heat resistant ceramic particles and a particulate metallic catalyst made of platinum, rhodium or the like, supported by the surface of the heat resistant ceramic particles. The catalyst layer is formed so that the catalyst is supported by the heat resistant support particles. The support particles are heat treated to grow to a particle size so that particle growth can be restrained when the support particles are exposed to the exhaust gas from an internal combustion engine. The outside of the electrode of the partition wall is covered with support particles having such heat treated large cohered catalyst particles, and good responsivity of the sensor is thereby maintained.
REFERENCES:
patent: 3935089 (1976-01-01), Togawa et al.
patent: 4177112 (1979-12-01), Suzuki et al.
patent: 4272349 (1981-06-01), Furutani et al.
patent: 4296148 (1981-10-01), Friese
patent: 4402820 (1983-09-01), Sano et al.
Fujii Namitsugu
Hotta Yasumichi
Nomura Satoru
Saito Toshitaka
Sano Hiromi
Nippondenso Co. Ltd.
Tung T.
LandOfFree
Oxygen concentration detector having heat-treated support layer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxygen concentration detector having heat-treated support layer , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen concentration detector having heat-treated support layer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1371694