Pump cell element for air-fuel ratio sensor

Details Pump cell element for air-fuel ratio sensor Pump cell element for air-fuel ratio sensor

1986-06-17

1987-12-15

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204410, 204429, G01N 2758

Patent

active

047131667

ABSTRACT:
A pump cell element, for an air-fuel ratio sensor, comprising an oxygen ion conductive zirconia solid electrolyte, a pair of layer electrodes coated on the both surface areas of a measuring portion, and ceramic coating layers each coated on each of said electrodes, at least one of said coating layers disposed on the electrode of a minus side of the pump cell element being provided uniformly and dispersedly with through-pores having a converted diameter of 20-500 .mu.m with an average opening percentage of said through-pores is 5-20%. Blackening at the cathode is effectively eliminated.

REFERENCES:
patent: 4101403 (1978-07-01), Kita et al.
patent: 4304652 (1981-12-01), Chiba et al.
patent: 4496455 (1985-01-01), Linder et al.
patent: 4498968 (1985-02-01), Yamada et al.
patent: 4510036 (1985-04-01), Takeuchi et al.

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