Effect of electrode microstructure on the sensitivity and response time of potentiometric NOx sensors based on stabilized-zirconia and La5/3Sr1/3NiO4-YSZ sensing electrode

被引：16
|
作者：
Chen, Ying [1 ]
Xia, Feng [1 ]
Xiao, Jianzhong [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Coll Mat Sci & Engn, Wuhan 430074, Peoples R China
来源：
SOLID-STATE ELECTRONICS | 2014年 / 95卷
关键词：
Mixed-potential-type gas sensor; Auto-combustion; La5/3Sr1/3NiO4; YSZ; NO; OXIDE ELECTRODES; REDUCTION;
D O I：
10.1016/j.sse.2014.03.001
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The microstructure of a potentiometric NOx sensor's electrodes considerably affects the sensor performance. In the present paper, nanometric La5/3Sr1/3NiO4 and different YSZ concentrations (5 wt%, 10 wt% and 20 wt%) composite powders were synthesized with microwave-assisted complex-gel autocombustion method for fabricating NOx sensor electrodes. The sensor electrodes were sintered at 1000 degrees C, 1100 degrees C and 1200 degrees C respectively to obtain a variety of electrode morphology. The electrode porosity decreased with the increased YSZ addition. The sintering temperatures have effect on the porosity and distribution. All the sensors could produce a steady-state response voltage at the lower temperatures. Sensor fabricated with 10 wt% YSZ additional composites and sintered at 1000 degrees C exhibited the biggest response to NO at 400 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：23 / 27
页数：5
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