Solid electrolyte exhaust gas sensor with increased NO.sub.x sen

Details Solid electrolyte exhaust gas sensor with increased NO.sub.x sen Solid electrolyte exhaust gas sensor with increased NO.sub.x sen

1978-11-30

1980-04-22

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2758

Patent

active

041994256

ABSTRACT:
A solid electrolyte exhaust gas oxygen responsive sensor having a platinum exhaust gas electrode and a porous ceramic coating on the electrode. The porous ceramic coating contains rhodium for making the sensor also responsive to NO.sub.x. In a specific example, rhodium permeates a gamma alumina porous overcoat on a sputtered platinum film serving as an exhaust gas electrode on a zirconia solid electrolyte member.

REFERENCES:
patent: 3454486 (1969-07-01), Davies
patent: 3768259 (1973-10-01), Carnahan et al.
patent: 3843400 (1974-10-01), Radford et al.
patent: 3935089 (1976-01-01), Togawa et al.
patent: 4067695 (1977-01-01), Miyaguchi
patent: 4126532 (1978-11-01), Takao et al.

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