LIU Zhi-min, QIN Hao, WANG Yang-yang, et al. Failure analysis and improvement of sealing material crack of ZrO2 oxygen sensor[J]. 2018, (4): 38-40. DOI: 10.13873/J.1000-9787(2018)04-0038-03.
According to failure mechanism of sealing material of ZrO
2
oxygen sensor
preheating function is put forward to add in sensor heating circuit. The effectiveness of the improved measure is verified by simulation and experiment.The results of simulation analysis show that the stress is reduced about 40% from temperature change range 200 ℃ to 400 ℃.The sample test results show that
after 576 times starting thermal stress tests are carried out
the sealing material is in good condition
without cracks.The results show that heating circuit can reduce the thermal stress impact strength after adding preheating function
which can avoid sealing material cracking in sensor usage.