| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas sensor processing method capable of suppressing the progress of oxidation of a reference electrode and suppressing the degradation of measurement accuracy.SOLUTION: A sensor element 101 of a gas sensor 100 is configured from an oxygen ion conductive solid electrolyte as a main component. Between a first electrode 22 formed on the surface of an inner void 20 into which gas to be measured is introduced from an outer space and a second electrode 23 formed on the outer face of the sensor element is applied a prescribed voltage determined by a potential difference between the first electrode and a reference electrode 42 provided in the sensor element, it is thereby made possible to bail out oxygen from inside the inner void. In the case where the gas sensor is designed to perform a pump reference process, the reference electrode is electrically connected to the negative electrode, and the second electrode connected to the positive electrode, of an external DC power supply, and the element temperature is adjusted to 700°C to 850°C inclusive, in which state a DC voltage, the maximum value of which is 1.4 V to 2 V inclusive, is applied between the reference electrode and the second electrode for 10 seconds to 1200 seconds inclusive. |
