Manufacturing method of heated tubular oxygen sensor

1. The utility model relates to the technical field of oxygen sensors, in particular to a heating type tubular oxygen sensor.

Background technique:

2. On engines that use a three-way catalytic converter to reduce exhaust pollution, the oxygen sensor is an indispensable element; the oxygen sensor uses the nernst principle; its core element is a porous zro2 ceramic tube, which is a solid electrolyte , Porous platinum (pt) electrodes were sintered on both sides.

3. The core element is a porous zro2 ceramic tube. At a certain temperature, due to the different oxygen concentration on both sides, the oxygen molecules on the high concentration side (the inner side of the ceramic tube 4) are adsorbed on the platinum electrode and combine with the electrons (4e) to form oxygen ions o2

 Make the electrode positively charged, o2

Ions migrate to the low oxygen concentration side (exhaust gas side) through the oxygen ion vacancies in the electrolyte, which makes the electrode negatively charged, that is, a potential difference is generated; it is not affected by the temperature of the detection atmosphere, and can detect various temperature atmospheres by using different flow tubes With medium oxygen content, the overall sealing performance is poor.

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