铈钛共掺杂氧化锆致密扩散层极限电流型氧传感器  

Cerium-titanium Co-doped Zirconia Dense Diff usion Layer Limit Current Type Oxygen Sensor

作　　者：乔权威 郜建全[1] 宋希文[1] 周芬[1] Qiao Quanwei;Gao Jianquan;Song Xiwen;Zhou Fen(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Inner Mongolia,014010)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古014010

出　　处：《当代化工研究》2024年第2期24-26,共3页Modern Chemical Research

摘　　要：采用固相法制备铈钛共掺杂氧化锆Ce_(0.2-x)Ti_(x)Zr_(0.8)O_(2)(CTZ)(x=0.05,0.1,0.15)混合导体材料,以铈钛共掺杂氧化锆作为致密障碍层,10ScSZ作为固体电解质,制备了极限电流氧传感器。结果表示:Ce_(0.2-x)Ti_(x)Zr_(0.8)O_(2)(CTZ)在x=0.05,x=0.1时主晶相为四方相结构,x=0.15时大量单斜相存在;随着Ti掺杂量x的增加晶粒逐渐增大,在x=0.05时,Ce_(0.2-x)Ti_(x)Zr_(0.8)O_(2)材料的电导率最大;在测试范围内,氧传感器具有良好的极限电流平台。在810℃时,极限电流与氧浓度呈线性关系:IL(mA)=0.778+0.451x(O_(2))(mol%)R=0.997。在恒温810℃,含氧量在6%和16%之间来回切换时,测得传感器的响应时间曲线,得出氧传感器呈现良好的重复性。Cerium-titanium co-doped zirconia Ce_(0.2-x)Ti_(x)Zr_(0.8)O_(2)(CTZ)mixed conductor materials with different Ti doping levels(x=0.05,0.1,0.15)were synthesized by solid-state reaction.The oxygen sensor with a limiting current was fabricated utilizing cerium-titanium co-doped zirconia as dense barrier layer and 10ScSZ as solid electrolyte.The results indicate that CTZ exhibits a tetragonal phase structure at x=0.05 and x=0.1,while a significant number of monoclinic phases are present at x=0.15.The grain size exhibits a gradual increase with the augmentation of Ti doping amount x,and the highest conductivity of CTZ is achieved at x=0.05.The oxygen sensor exhibits a robust limit current platform within the test range.The lim-iting current exhibits a linear correlation with oxygen concentration at 810℃:IL(mA)=0.778+0.451x(O_(2))(mol%)R=0.997.When the oxygen concentration switches back and forth between 6%and 16%at a constant temperature of 810℃,the response time curve of the sensor is measured.The oxy-gen sensor shows good repeatability.The oxygen sensor shows good repeatability.

关 键 词：铈钛共掺杂氧化锆 致密障碍层 极限电流 氧传感器 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]