Electrochemical sensor

Details Electrochemical sensor Electrochemical sensor

1991-12-13

1997-09-02

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204427, G01N 27409

Patent

active

056627866

ABSTRACT:
The electrochemical sensor for determination of an oxygen content of exhaust gases, includes a probe element including a tube made from a raw material mixture consisting essentially of an ionically conductive solid electrolyte; an outer electrode located on the outer surface of the tube; a substantially pore-free conductor strip layer located on the outer surface, connected to the outer electrode, and extending toward the open end, the conductor strip layer having a portion in close proximity to the tube open end; and a substantially pore-free cover layer hermetically covering at least the portion of the pore-free conductor strip layer in close proximity to the open end of the tube, the cover layer being made from a cover layer material including the ionically conductive solid electrolyte. The cover layer material advantageously a sintering activity which is at least equal to that of the raw material mixture from which the tube is made. The conductor strip layer consists essentially of a ceramic supporting framework and an electron-conducting material. The ceramic ceramic binder has at least the same sintering activity as the cover layer material.

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patent: 4502939 (1985-03-01), Holfelder et al.
patent: 4879016 (1989-11-01), Joshi
patent: 4947125 (1990-08-01), De Pous

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