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The purpose of this paper is to study the oxygen field sensor based on the temperature field and the thermal field. By using cerium zirconium oxygen storage material as the oxygen partial pressure reference layer, the multi layer structure of flat type concentration oxygen sensor was designed. The finite element model of the sensor is established. Thermal conductivity and thermal stress analysis of 8YSZ and 3YSZ different electrolyte sensors were carried out respectively. The results show that the sensor reaches the response temperature above 300 °C at t = 5s. When the sensor is stable, the temperature of the sensitive area is about 800 °C. At the same time, it shows consistency in the thickness direction. The thermal stress of each layer of the sensor increases with increasing temperature. When the sensor is stable, it reaches its maximum value. However, they are less than the breaking strength of each material. Based on the above findings, we conclude that the plate type concentration oxygen sensor based on temperature field and thermal field has the advantages of fast response time and reliable performance.

THE ANALYSIS AND RESEARCH FOR THE PLATE DIFFERENTIAL OXYGEN GAS SENSOR OF AUTO BASED ON THE TEMPERATURE FIELD AND THERMAL STRESS FIELD