Mindt W F, Eberhard P
Acta Anaesthesiol Scand Suppl. 1978;68:63-7. doi: 10.1111/j.1399-6576.1978.tb01394.x.
After application of the polarization voltage to a newly prepared oxygen sensor, an initial stabilization of several minutes to a few hours is required. The electrochemical phenomena accounting for this stabilization process are discussed. By far the slowest reaction is the change of the oxidation state of the noble metal cathode after application of the polarization voltage. During this process, reduction of surface oxides at the cathode causes a transient current. The contribution of this reaction to the total current is proportionately higher in the case of oxygen sensors with low cathode current densities (large cathode, membrane of low oxygen permeability) than in the case of sensors with microcathodes. For the first type of sensor, a technique has been developed which allows acceleration of this surface reaction by passing a high constant current across the cathode. With this technique, the stabilization time can be considerably shortened in a reproducible manner, and the sensor is ready to be used within 15 to 30 min of its preparation. This time is comparable to the stabilization time needed for sensors with microcathodes.
在向新制备的氧传感器施加极化电压后，需要几分钟到几小时的初始稳定时间。本文讨论了导致这种稳定过程的电化学现象。迄今为止，最慢的反应是施加极化电压后贵金属阴极氧化态的变化。在此过程中，阴极表面氧化物的还原会产生瞬态电流。在阴极电流密度低的氧传感器（大阴极、低氧渗透率的膜）中，该反应对总电流的贡献比在具有微阴极的传感器中相应地更高。对于第一种类型的传感器，已经开发出一种技术，通过使恒定高电流通过阴极来加速这种表面反应。使用这种技术，可以以可重复的方式显著缩短稳定时间，并且传感器在制备后15至30分钟内即可投入使用。这个时间与具有微阴极的传感器所需的稳定时间相当。
