An analysis is conducted on the performance impact of limiting-current zirconia oxygen sensors in thermal vacuum tests.Through mechanism analysis

it is revealed that the mismatch in thermal expansion coefficients between the zirconia and platinum electrodes used in the sensor and the electrolysis of zirconia electrolyte under vacuum conditions are the main factors causing performance degradation.Through thermal vacuum testing

the performance changes of sensors under thermal vacuum environmental conditions are studied

and the influence of thermal vacuum on sensor output

response time

accuracy

and long-term stability is analyzed.The experimental results show that after the thermal vacuum environmental test

the sensors exhibit performance degradation phenomena such as reduced output in a normal environment

prolonged response time

and decreased accuracy and stability.This study provides theoretical basis and experimental support for optimizing the performance of limiting-current zirconia oxygen sensors in extreme environments.