Electrochemical measuring probe

Details Electrochemical measuring probe Electrochemical measuring probe

1994-04-14

1996-01-23

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204427, G01N 27407

Patent

active

054862795

ABSTRACT:
An electrochemical measuring probe for determining the oxygen content of gases, in particular of exhaust gases of internal combustion engines, whose measuring probe body consists essentially of a solid electrolyte, for example stabilised ZrO.sub.2 and whose electrode exposed to the gas to be measured is a cermet electrode which is coated with a finely porous ion-conducting covering layer composed of an ion-conducting supporting matrix material having no sintering activity of the type standard for cermet electrodes the covering layer is covered by a porous protective layer. The ion-conducting porous covering layer appreciably increases the activity of the cermet electrode.

REFERENCES:
patent: 4021326 (1977-05-01), Pollner et al.
patent: 4164462 (1979-08-01), Ichikawa et al.
patent: 4177112 (1979-12-01), Suzuki et al.
patent: 4292158 (1981-09-01), Muller et al.
patent: 4296148 (1981-10-01), Friese
patent: 4354912 (1982-10-01), Friese
patent: 4402820 (1983-09-01), Sano et al.
patent: 4502939 (1985-03-01), Holfelder et al.

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