基于多掺杂的CeO_(2)和La_(0.8)Sr_(0.2)Fe_(0.7)Ni_(0.3)O_(3-δ)极限电流型氧传感器的制备及性能研究  

Preparation and Performance Research of Limiting Current Oxygen Sensor Based on Multi-doped CeO_(2) and La_(0.8)Sr_(0.2)Fe_(0.7)Ni_(0.3)O_(3-δ)

作　　者：姜晓峰 周芬[1] 郜建全[1] 宋希文[1] Jiang Xiaofeng;Zhou Fen;Gao Jianquan;Song Xiwen(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China;Hebei CNC Risun Energy Limited,Xingtai 054000,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]河北中煤旭阳能源有限公司,河北邢台054000

出　　处：《中国稀土学报》2023年第5期949-955,I0003,共8页Journal of the Chinese Society of Rare Earths

基　　金：内蒙古自然科学基金项目(2021LHMS05025)资助。

摘　　要：采用溶胶-凝胶法制备Ce_(0.8)Sm_(0.1)Nd_(0.05)Ca_(0.05)O_(2-δ)(CSNC)和La_(0.8)Sr_(0.2)Fe_(0.7)Ni_(0.3)O_(3-δ)(LSFN)粉体。利用X射线衍射仪、电化学工作站、数字源表等设备分别对试样的晶体结构和性能进行测试。采用陶瓷片复合法制备致密扩散障极限电流氧传感器,并对其氧敏性能进行测试。结果表明:CSNC呈立方萤石结构,LSFN为六方钙钛矿结构。LSFN在700℃时,电导率达到最大为359.40 S·cm^(-1)。氧传感器在600~800℃范围内,氧含量为2%~20%时,显示出良好的极限电流平台。在同一温度下,随着氧浓度的增加,出现极限电流平台的电压逐渐增大,极限电流逐渐升高,极限电流IL与氧浓度x(O_(2))之间存在较好的线性关系;在同一氧浓度下,随温度的升高,出现极限电流平台的电压逐渐降低,极限电流逐渐增大,lg IL与1000/T呈线性关系。Ce_(0.8)Sm_(0.1)Nd_(0.05)Ca_(0.05)O_(2-δ)(CSNC)and La_(0.8)Sr_(0.2)Fe_(0.7) Ni_(0.3)O_(3-δ)(LSFN)powder were prepared by sol-gel method.The crystal structure and performance of the sample was tested respectively by using X-ray diffraction instrument,electrochemical workstation,digital source table and other equipment.The dense diffusion barrier limiting current oxygen sensor was fabricated by ceramic sheet composite method,and its performance was mea⁃sured.The results show that CSNC has a cubic fluorite structure,LSFN is a hexagonal perovskite structure,and the electrical conductivity of LSFN reaches a maximum of 359.40 S·cm^(-1) at 700℃.The oxygen sensor fabricat⁃ed by CSNC and LSFN shows a good limiting current platform at the temperature range of 600~800℃ and oxy⁃gen concentration of 2%-20%.At the same temperature,with the increase of oxygen content,the voltage at which the limiting current plateau appears gradually increases,and the current gradually increases,and there is a good linear relationship between the limiting current I L and the oxygen concentration x(O_(2)).At the same oxy⁃gen concentration,the voltage at which the limiting current platform appears gradually decreases with the in⁃crease of temperature,while the limiting current gradually increases.The lgI L has a linear relationship with 1000/T.

关 键 词：氧传感器 极限电流 铈基电解质 致密扩散障碍层 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]