Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1993-08-02
1995-06-27
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204425, 204429, G01N 2726
Patent
active
054276721
ABSTRACT:
A planar sensor made of ceramic material, for measuring and detecting combustible gases and/or the oxygen content in furnaces or in the exhaust gases of internal combustion engines, is described. The sensor has an at least five-layered structure on the basis of a combination of three zirconium dioxide layers with two aluminum oxide layers, a metallic heating resistor being embedded between two aluminum oxide layers, and three zirconium dioxide layers being combined with two platinum electrodes and one further electrode made of a binary or ternary alloy of platinum with gold, nickel, copper, rhodium, ruthenium, palladium or titanium. A process for fabricating the sensor is also described. It is also possible for the sensor to be combined, according to the invention, with a suitable housing which on its outside is provided with connecting wires and plugs for transmitting the measured signals.
REFERENCES:
patent: 4798693 (1989-01-01), Mase et al.
patent: 5108577 (1992-04-01), Mase et al.
patent: 5139829 (1992-08-01), Minoha et al.
Bocker Wolfgang
Kostler Christine
Moser Hermann
Roosen Andreas
Bell Bruce F.
Hoechst Aktiengesellschaft
Niebling John
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