Synthesis of composite La1.67Sr0.33NiO4-YSZ for a potentiometric NOx sensor by microwave-assisted complex-gel auto-combustion
Synthesis of composite La1.67Sr0.33NiO4-YSZ for a potentiometric NOx sensor by microwave-assisted complex-gel auto-combustion
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DOI：
10.1016/j.ceramint.2013.05.080
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发表时间：
2013-12-01
影响因子：
5.2
通讯作者：
Xiao, Jian-Zhong
中科院分区：
文献类型：
--
作者：
Chen, Ying;Xiao, Jian-Zhong
本文报道了一种简易的微波辅助络合凝胶自燃烧法合成La_（1.67）Sr_（0.33）NiO_4和YSZ复合粉体及其在高性能电位型NOx传感器中的应用。采用傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）对不同YSZ含量（5wt%、10wt%和20wt%）的复合粉体进行了表征。在400 ℃至600 ℃的温度范围内测试了复合材料对NO的气敏性能。用10wt%YSZ添加复合敏感电极制造的传感器在400 ℃下表现出最大的响应（对于700 ppm NO约27 mV）。此外，响应时间和恢复时间分别为4-18 s和6-35 s。该传感器对NO的气敏性能增强可能是由于三相界面的表面积较大。本工作表明，简单合成的La_（1.67）Sr_（0.33）NiO_4和YSZ复合粉末可以有效地用于电位型NOx传感器的制造。(C)2013由Elsevier Ltd和Techna Group S.r.l.出版
This paper reports a facile microwave-assisted complex-gel auto-combustion method synthesis of La1.67Sr0.33NiO4 and YSZ composite powders and their utilization for the fabrication of high performance potentiometric NOx sensors. The synthesized composite powders with different YSZ concentrations (5 wt%, 10 wt% and 20 wt%) were characterized using Fourier transformed infrared (FTIR) spectrum and X-ray diffraction (XRD). The gas sensing property of the composites to NO was tested at temperatures ranging from 400 degrees C to 600 degrees C. The sensor fabricated with 10 wt% YSZ addition composite sensing electrode exhibited the biggest response (about 27 mV for 700 ppm NO) at 400 degrees C. Moreover, the response time and recovery time were within 4-18 s and 6-35 s, respectively. The enhanced gas sensing performance of the sensor to NO may be attributed to the larger superficial area of triple phase boundary. This work demonstrated that the simply synthesized La1.67Sr0.33NiO4 and YSZ composite powders can be effectively used for the fabrication of potentiometric NOx sensors. (C) 2013 Published by Elsevier Ltd and Techna Group S.r.l.