A study of optimization of sensor electrodes for inproving NOx response properties

研究了电流型氧化锆基 NOx 传感器传感电极的改进。为了增强 NOx 响应而制作薄致密传感电极的研究结果是，使用含有 La(NO3)3、Sr(OC3H7)2、Mn(CH3COO)2.4H2O 与乙醇胺和乙偶氮混合的 2-甲氧基乙醇溶液，通过旋涂技术在氧化锆基底上获得了致密和薄的 La0.8Sr0.2MnO3 电极。还发现La0.8Sr0.2MnO3中的Mn被Al取代提高了高温还原气氛下的稳定性，并且通过优化传感器电极的成分和制备方法，传感器表现出较高的稳定性和响应性。

Improvements of sensing electrode of an amperometric-type zirconia-based NOx sensor were examined. As a result of investigation for making a thin-dense sensing electrode in order to enhance the NOx response, dense and thin electrodes of La0.8Sr0.2MnO3 on zirconia substrate were obtained by spin coating technique using 2-methoxyethanol solution containing La(NO3)3, Sr(OC3H7)2, Mn(CH3COO)2.4H2O mixed with ethanolamine and acetoine. It was also found that substitution of Mn with Al in La0.8Sr0.2MnO3 improves the stability in high-temperature reduction atmosphere, and the sensor shows high stability and response by optimization of composition and preparation method of the sensor electrode.