Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1982-07-29
1983-09-06
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204429, G01N 2756, G01N 2758
Patent
active
044028202
ABSTRACT:
A limiting current type oxygen analyzer designed for detecting oxygen concentration comprising a solid electrolyte element made from an oxygen ion conductive metal oxide and a pair of porous film electrodes provided on the inner and outer sides of said element respectively, at least one side electrodes being coated with a gas-diffusive resistive layer made from a porous insulating metal oxide, wherein the oxygen ions in the gas to which said element is exposed are caused to diffuse in the inside of said electrolyte element by applying a given voltage across said both electrodes and the limiting current corresponding to the concentration of said diffused oxygen ions is measured to determine the oxygen concentration in the gas to be analyzed, further characterized in that said gas-diffusive resistive layer is composed of a three-layer structure consisting of the first, second and third layers counted from the electrode side, said first layer having porosity of 11-15%, the second layer 6-8% and the third layer 15-20%.
REFERENCES:
patent: 4265930 (1981-05-01), Shinohara et al.
Fujimoto Masaya
Saito Toshitaka
Sano Hiromi
Suzuki Masatoshi
Yamakawa Mitihiro
Kaplan G. L.
Nippondenso Co. Ltd.
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