ZrO_2氧传感器多孔保护层研究

Research on Porous Protecting Coating for Zirconia Oxygen Sensors

汽车尾气净化用ZrO2氧传感器的电极表面通常要有陶瓷多孔层，“过滤”废气中的杂质，这对于延长氧传感器的寿命有很重要的作用。本文以镁铝尖晶石为主要原料在1500—1550℃下烧结成多孔保护层，通过研究造孔剂、粘结剂含量以及烧结过程的工艺参数对保护层性能的影响，制备出性能良好的复合氧传感器保护层。

A porous ceramic coating on electrode of zirconia oxygen sensor is commonly used to clean exhaust gas from cars. It plays an important role in extending the sensor＇ s life. Aiming at the protecting coating we use MgAl2O4 as major raw material to produce porous ceramic coating by means of sintering at 1500 - 1550℃. Through series of measurements and tests on modifying factors such as pore - forming material, binding agent and some parameters of sintering, we have prepared the desired protecting coating that can work well under high temperature.