G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 27/409 (2006.01) G01N 27/407 (2006.01)
Patent
CA 2161602
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 (SH) of the pore portions is 100 µm2 or less, a film thickness of the skeletal electrode is in a range from 1.5 to 4 µm, and the film thickness of the reactive electrode is in a range from 0.6 to 1.5 µm. The oxygen sensor element is superior in the heat resistance characteristics and the response characteristics.
Hotta Yasumichi
Miwa Naoto
Saito Toshitaka
Sano Hiromi
Suzuki Masatoshi
Fetherstonhaugh & Co.
Nippondenso Co. Ltd.
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