PURPOSE: To make the action possible even in ≤500°C comparatively low temperature ranges, by using a metallic oxide complex consisting essentialy of oxides of lanthanum, bismuth and cobalt.
CONSTITUTION: A metallic oxide complex serving as an oxygen sensor element consists essentially of oxides of lanthanum, bismuth and cobalt. It is desirable that the component ratio of each atom is fixed in the range that 0.1W10g atom lanthanum and 0.1W15g atom bismuth per 1g atom cobalt are present and also, the ratio of the sum of each g valence of lanthanum and bismuth to that of cobalt is desirable to be 0.2W15 and moreover, the ratio of g valence of bismuth to that of lanthanum is disirable to be 0.1W10. This metallic oxide compound has an oxygen ion conductive property and at the same time, has an electron conductive property and the electrically conductive property is varied with the variation of partial pressure of oxygen atmosphere.
OKITSU HIROYUKI
YAMAJI TEIZOU
