Electrochemical oxygen sensor, particularly for analysis of comb

Details Electrochemical oxygen sensor, particularly for analysis of comb Electrochemical oxygen sensor, particularly for analysis of comb

1984-01-19

1985-03-05

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 204425, 204426, 204427, 204428, 156 89, 264 61, 4271265, G01N 2746

Patent

active

045029393

ABSTRACT:
To provide access of gases to an electrode (39, 48) positioned on a flat plate (35) of solid electrolyte material, under controlled conditions, and while preventing access of gases to the electrodes where not desired, the electrodes are covered with a porous cover layer (42, 49) of sintered granular material, for example of zirconium dioxide, having a grain size of 10 .mu.m, and 25 .mu.m thick, with void or pore-formation material added thereto which, upon sintering, becomes volatile and leaves a porous structure. A gas-tight tunnel covering (44, 51) extends over the electrode and filler covering leaving an open space in those regions where the electrode is exposed to the desired gas, for example a test gas adjacent the sensing end (11/1) of the sensor, or oxygen from ambient air adjacent the connecting or terminal end (11/3) of the sensor, the respective gas to be applied to the electrode diffusing through the pores of the porous structure to the respective electrode.

REFERENCES:
patent: 4101403 (1978-07-01), Kita et al.
patent: 4157282 (1979-06-01), Riddel
patent: 4282080 (1981-08-01), M/u/ ller et al.
patent: 4294679 (1981-10-01), Maurer et al.
patent: 4300990 (1981-11-01), Maurer
patent: 4310401 (1982-01-01), Stahl
patent: 4334974 (1982-06-01), M/u/ ller et al.
patent: 4356065 (1982-10-01), Dietz

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