| 摘要 |
There is described a gas-component concentration sensor, a method of using the sensor, and a method of manufacturing a particular electrode of the sensor, wherein the sensor comprises: a first measurement chamber, an oxygen partial-pressure detection electrode in the first measurement chamber, a first oxygen-ion pump cell within and outside the first measurement such that in response to a voltage applied between the pair electrodes the cell pumps out oxygen to an extent such that a gas component such as NOx partially decomposes in said first measurement chamber in an amount of not more than 40 wt. % of the gas component present; a second measurement chamber into which the measurement gas is introduced from the first measurement chamber, a second oxygen pump cell having a pair of electrodes such that in response to a voltage applied therebetween the second oxygen-ion pump cell decomposes the gas component within the second measurement chamber; wherein the pair of electrodes of the first oxygen ion pump cell the electrode provided inside first measurement chamber includes fine particles having a function of suppressing dissociation of the gas component that are formed on and carried by a first constituent component of the electrode.
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