Oxygen sensor element

Details Oxygen sensor element Oxygen sensor element

1992-03-12

1996-07-23

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204426, G01N 27407

Patent

active

055386121

ABSTRACT:
An oxygen sensor element comprises a reference-gas-side electrode on one surface of a solid electrolyte having oxygen-ion conductivity, a detection-gas-side electrode on another surface, and a porous coated layer formed of a heat-resistant metal oxide formed on the surface of the detection-gas-side electrode, wherein at least a part of said coated layer is formed of a nonstoichiometric compound of transition metal (Ti, Co, Ni) oxide, and a portion formed of said nonstoichiometric compound carries a catalyst for equilibrating gas components of a detection gas. The catalyst (Pt, Rh) is 0.2-5 mole % relative to the portion formed of said nonstoichiometric compound. The coated layer may be thickened at the distal end portion.

REFERENCES:
patent: 3843400 (1974-10-01), Radford et al.
patent: 3978006 (1976-08-01), Topp et al.
patent: 3989614 (1976-11-01), Tien
patent: 4097353 (1978-06-01), Kishida et al.
patent: 4174258 (1979-11-01), Bode
patent: 4276142 (1981-06-01), Topp et al.
patent: 4280890 (1981-07-01), Friese et al.
patent: 4720335 (1988-01-01), Fukushima et al.
patent: 4915080 (1990-04-01), Nakaniwa et al.
Hackh's Chemical Dictionary, 4th ed. (1969) month unavailable, p. 687.

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