基于Sr_(2)Fe_(1.5-x)Nb_(x)Mo_(0.5)O_(6-δ)敏感电极的高温阻抗型NO传感器  

High temperature impedance type NO sensor based on Sr_(2)Fe_(1.5-x)Nb_(x)Mo_(0.5)O_(6-δ) sensitive electrode

作　　者：王朝玉 刘永光 孟维薇 戴磊 王岭 WANG Chaoyu;LIU Yongguang;MENG Weiwei;DAI Lei;WANG Ling(College of Chemical Engineering,North China University of Science and Technology,Tangshan 063200,China)

机构地区：[1]华北理工大学化学工程学院,河北唐山063200

出　　处：《传感器与微系统》2023年第4期14-18,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(51872090,51772097,62241104);河北省自然科学基金资助项目(E2020209151,B2022209018);唐山市科技计划资助项目(21130214C,22130215G);唐山市人才资助项目(A202202006)。

摘　　要：针对钢铁工业氮氧化物(NO_(x))减排的紧迫形势,对NO_(x)进行检测与分析具有重要意义。以氧化钇稳定氧化锆(YSZ)为固体电解质,以溶胶凝胶法合成的双钙钛矿结构的Sr_(2)Fe_(1.5-x)Nb_(x)Mo_(0.5)O_(6-δ)(SFM、SF-NbM)氧化物为敏感电极(SE),制备了一种阻抗型NO传感器。用XRD和SEM对材料的组成和微观结构进行了表征。SFNbM-SE传感器在450~550℃范围内进行了测试,研究了NO体积分数对电化学过程的影响。结果表明:SFNbM-SE传感器比基于SFM的传感器具有更高、更稳定的响应值。在0.1 Hz下,传感器的响应信号与NO体积分数的对数几乎呈线性变化。在500℃和0.1 Hz时,SFNbM-SE传感器拥有最高的灵敏度,该传感器还具有良好的稳定性。In view of the urgent situation of nitrogen oxide(NO_(x))reducing in steel industry,it is of great significance to detect and analyze NO_(x).Using yttrium stabilized zirconia(YSZ)as solid electrolyte,Sr_(2)Fe_(1.5-x)Nb_(x)Mo_(0.5)O_(6-δ)(SFM,SFNbM)oxide with double perovskite structure is synthesized by solgel method as a sensitive electrode(SE),and an impedance type NO sensor is prepared.The composition and microstructure of the materials are characterized by XRD and SEM.The SFNbMSE sensor is tested in the range of 450~550℃and the effect of NO volume fraction on the electrochemical process is studied.The results show that the SFNbMSE sensor has a higher and more stable response value than the sensor based on SFM.At 0.1 Hz,the response signal of the sensor changes almost linearly with the logarithm of NO volume fraction.When the frequency is 0.1 Hz at 500℃,the sensor with SFNbM as the SE has the highest sensitivity.In addition,the sensor has good stability.

关 键 词：阻抗型NO传感器 双钙钛矿氧化物 敏感电极 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置] X511[自动化与计算机技术—控制科学与工程]