Electrochemical gas sensor, and method for manufacturing the sam

Details Electrochemical gas sensor, and method for manufacturing the sam Electrochemical gas sensor, and method for manufacturing the sam

1987-09-02

1989-08-22

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, 204427, 204429, 264 61, G01N 2746

Patent

active

048593079

ABSTRACT:
A gas sensor for dealing with a measurement gas in an external space, including an electrochemical pumping cell having a planar solid electrolyte body, and a first and a second electrode which are disposed on opposite surfaces of the solid electrolyte body. The sensor has a gas-tight ceramic body cooperating with the solid electrolyte body, to define therebetween a thin flat space, such that the first electrode communicates with the thin flat space. The thin flat space extends in a direction parallel to a plane of the planar solid electrolyte body and has a predetermined diffusion resistance to the measurement gas. The sensor further includes a porous structure exposed to the thin flat space in a direction of thickness of the thin flat space. The porous structure is juxtaposed with respect to the first electrode in the direction parallel to the plane of the solid electrolyte body, and maintains the thin flat space in communication with the external space under a predetermined diffusion resistance. A method of manufacturing the gas sensor is also disclosed.

REFERENCES:
patent: 4502939 (1985-03-01), Holtelder et al.
patent: 4579643 (1986-04-01), Mase et al.
patent: 4645572 (1987-02-01), Nishizawa et al.
patent: 4772376 (1988-09-01), Yukawa et al.
Laid-Open Publication No. 59-163558 (Japanese Pat. Appln. 58-37282).
Laid-Open Publication No. 58-19554 (Japanese Pat. Appln. No. 56-117407).
Laid-Open Publication No. 60-13256 (Japanese Pat. Appln. No. 58-121264).

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