钇铁共掺杂锆酸钙致密扩散层极限电流型氧传感器  

Limiting Current Oxygen Sensor Based on Y, Fe co-doped CaZrO-based Materials As Dense Diffusion Barrier Layer

作　　者：单科[1] 杨艾嘉 翟凤瑞[1] 姚喆[2] 李楠[1] 谢志鹏[3] 易中周[1] SHAN Ke;YANG Aijia;ZHAI Fengrui;YAO Zhe;LI Nan;XIE Zhipeng;YI Zhongzhou(Laboratory of New Materials for Power Sources,College of Science,Honghe University,Mengzi 661199,Yunnan,China;School of Chemistry and Biological Engineering,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,China)

机构地区：[1]红河学院理学院,新能源材料重点实验室,云南蒙自661199 [2]北京科技大学化学与生物工程学院,北京100083 [3]清华大学,新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《硅酸盐学报》2020年第9期1418-1423,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51962004,51562009和51762015);云南省应用基础研究计划(2016FB098)资助项目。

摘　　要：采用固相反应法合成钇铁共掺杂锆酸钙(Y0.08Ca0.92Zr1-xFexO3-δ(x=0.3,0.4,0.5))混合导体材料,以钇铁共掺杂锆酸钙为致密扩散障碍层,以YSZ为泵氧层,制备了极限电流氧传感器。结果表明:Y0.08Ca0.92Zr1-xFexO3-δ的主晶相为菱方钙钛矿结构;随Fe掺杂量的增加,Y0.08Ca0.92Zr1-xFexO3-δ材料的总电导率和离子电导率均增大;在800~950℃范围,氧传感器具有良好的极限电流,出现极限电流的温度随Fe掺杂量的增加而降低,极限电流(lg IL)与1 000/T呈线性关系:lg IL=3.215-2.101 3×(1 000/T),氧离子扩散激活能为0.417 eV。在750℃、1.0%(摩尔分数)≤x(O2)≤7.5%时,极限电流IL与氧含量x(O2)间的关系式为:IL=7.047 6+3.875 1×x(O2)。Y-, Fe co-doped CaZrO3(Y0.08Ca0.92Zr1-xFexO3-δ(x=0.3,0.4,0.5)) was synthesized by solid state reaction method. The crystal phase composition, microstructure, oxygen ionic conductivity, total conductivity and sensing properties were investigated. The result suggests that a highly orthorhombic perovskite structure and the increase of Fe-doped amount is unfavorable for the formation of single orthorhombic perovskite structre. The total electrical conductivity and ionic conductivity increase with Fe-doped amount increasing. The oxygen sensor shows good limiting current plateau in the range of 800-950 ℃. The linear relationship between limiting current(lgIL) and 1 000/T can described as follows: lgIL =3.215-2.101 3×(1 000/T)and the activation energy of oxygen ion is 0.417 e V. At 750 ℃、1.0%≤x(O2)≤7.5%,the relationship between limiting current(IL) and oxygen amount(x(O2)) can be expressed:IL= 7.047 6+3.875 1×x(O2).

关 键 词：掺杂 锆酸钙 致密扩散层 极限电流 氧传感器 

分 类 号：TQ174[化学工程—陶瓷工业]