Electrochemical sensor, particularly oxygen sensor to determine

Details Electrochemical sensor, particularly oxygen sensor to determine Electrochemical sensor, particularly oxygen sensor to determine

1979-07-05

1981-05-05

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

G01N 2758

Patent

active

042657245

ABSTRACT:
To improve adhesion of a porous cover layer over a platinum or platinum-rhodium electrode layer on a solid electrolyte body, for example of stabilized zirconium dioxide, the electrode layer is applied in form of interrupted, adjacent strips leaving gaps exposing the solid electrolyte body therebeneath. The porous cover layer will adhere well to the solid electrolyte body, thus protecting both the electrode and the cover layer against flaking off under high-temperature and temperature variation conditions. The sensitivity can be improved by interposing a layer of ceramic mixed with platinum or a platinum rhodium between the solid electrolyte body and at least some of the electrode strips, the adhesion of the porous cover layer over the interposed thick-film layer, where exposed between the portions of the electrode on the solid electrolyte body being sufficient for the intended purpose.

REFERENCES:
patent: 3989614 (1976-11-01), Tien
patent: 4119512 (1978-10-01), Inoue et al.
patent: 4121988 (1978-10-01), Sano et al.

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