流延共烧法极限电流氧传感器研究  

Study of limiting current oxygen sensor by casting and co-firing method

作　　者：邵禹铭[1] 郑雁公[1] 邹杰[1] 简家文[1] SHAO Yu-ming ZHENG Yan-gong ZOU Jie JIAN Jia-wen(School of Information Science and Engineering, Ningbo University, Ningbo 315211, China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《传感器与微系统》2017年第4期46-50,共5页Transducer and Microsystem Technologies

摘　　要：采用固相法合成La_(0.8)Sr_(0.2)MnO_3(LSM)粉体,利用干压法制备自合成LSM粉体和商业化8钇稳定氧化锆(8YSZ)粉体的条样;利用流延法以及多层高温共烧工艺制备以LSM致密层为扩散障的8YSZ基极限电流氧传感器;利用四端子测电阻法对LSM和8YSZ条样在干燥空气和氦气中进行电导率的剥离测试,结果发现:在700℃时,LSM和8YSZ电子电导率分别占总电导率的99.7%和0.03%。进一步对传感器进行测试,发现传感器均具有一定的饱和平台,且随着致密扩散障厚度的增加极限电流减小。La0.8 Sr0.2 MnO3 （8LSM）powder is synthesized uxing solid-state method. In the meantime, LSM （or 8 yttria stabilized zirconia （8YSZ） ） rod and 8YSZ-based limiting current oxygen sensor are fabricated with the conventional pressed approach and tape casting ＆ co-firing way, respectively. Through four terminal measurements ,the electrical and ionic conductivity for the LSM （or 8YSZ）rod is differentiated by measuring the resistance in air or He. The results indicate that the electrical conductivity of proportion the total conductivity in LSM and 8YSZ is about 99.7 % and 0.03 % , respectively. Further investigation suggests that the fabricated sensor exhibited current limiting stage to sense oxygen at each concentration. Additionally, it is found that the limiting current decreases with increase in the thickness of the dense diffuse barrier.

关 键 词：LSM致密扩散障 流延 共烧 极限电流氧传感器 8钇稳定氧化锆(8YSZ) 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]