Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1995-10-27
1998-01-13
Bell, Bruce F.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
204424, 205163, 205167, 205210, 205219, G01N 2726
Patent
active
057075034
ABSTRACT:
According to the present invention, an oxygen sensor element includes a solid electrolyte having a side surface at one side thereof, the side surface being contactable with a gas to be measured, a skeletal electrode provided on the side surface and having a plurality of pore portions, each of the pore portions passing through the skeletal electrode up to the solid electrolyte, and a reactive electrode made of a porous film and provided in each of the pore portions, a thickness of the porous film being smaller than that of said skeletal electrode. An area percentage (SH/SZ) which is a ratio of a total area (SH) of the reactive electrode to a total area (SZ) of the skeletal electrode and the reactive electrode is in a range from 10 to 50%, an average area (SA) of the pore portions is 100 .mu.m.sup.2 or less, a film thickness of the skeletal electrode is in a range from 1.5 to 4 .mu.m, and the film thickness of the reactive electrode is in a range from 0.6 to 1.5 .mu.m. The oxygen sensor element is superior in the heat resistance characteristics and the response characteristics.
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patent: 5421984 (1995-06-01), Saito et al.
Hotta Yasumichi
Miwa Naoto
Saito Toshitaka
Sano Hiromi
Suzuki Masatoshi
Bell Bruce F.
Nippondenso Co. Ltd.
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