摘要
使用溶胶-凝胶法制备并在900℃煅烧6 h获得了NiFe_(2)O_(4) 粉体,用于制备敏感电极。采用流延技术制备了5YSZ膜和Al_(2)O_(3) 膜,并在膜上分别丝网印刷了参比电极和加热电极,将它们叠层并在1 480℃烧结后,再印刷NiFe_(2)O_(4) 敏感电极并在1 150℃烧结,最终获得了电势型NH_(3)传感器件。在11 V、13 V和15 V的加热电压下测试了器件的NH;响应性能,响应性能在13 V和15 V时较稳定,NH;敏感度分别为-47.24 mV/decade和-28.57 mV/decade。并在13 V加热电压下研究了器件对320×10^(-6) 和200×10^(-6) NH_(3)混入不同浓度NO_(2) 后的响应信号,发现测试气氛中NH_(3)浓度较高时的抗NO_(2) 信号干扰能力较强。还在此加热电压下研究了氧气浓度由10%变化到7%、4%和14%时器件对320×10^(-6) NH_(3)的响应信号,发现氧气浓度低时的响应信号变化率较大。
The NiFe_(2)O_(4) powder was prepared by sol-gel method and calcined at 900 ℃ for 6 h, which was used to prepare the sensing electrode. The 5 YSZ film and Al_(2)O_(3) film were prepared by casting technology, and the reference electrode and heating electrode were screen printed on them respectively. After they were laminated and sintered at 1 480 ℃,the NiFe_(2)O_(4) -SE was printed and sintered at 1 150 ℃,the potentiometric ammonia sensor was finally obtained. The ammonia response performance of the device was tested under heating voltages of 11 V,13 V and 15 V. The device has good performance stability at 13 V and 15 V,and the ammonia sensitivity is-47.24 mV/decade and-28.57 mV/decade, respectively. And the response signal of the device to 320×10^(-6) and 200×10^(-6) of NH_(3) mixed with different concentrations of NO_(2) was studied under the heating voltage of 13 V,it was found that the anti-NO_(2) signal interference ability was stronger when the NH_(3) concentration in the testing atmosphere was higher. The response signal of the device to 320×10^(-6) NH_(3) when the oxygen concentration changed from 10% to 7%,4%,and 14% was also studied under this heating voltage. It was found that the response signal change rate was great when the oxygen concentration was low.
作者
杨斌
王瑜琛
谢宁
王超
肖建中
YANG Bin;Wang Yuchen;Xie Ning;WANG Chao;XIAO Jianzhong(Nano New Material Engineering Technology Research Center,School of Chemistry and Chemical Engineering,Ankang University,Ankang Shaanci 725000,China;State Key Laboratory of Materials Proessing and Die&Mold Technology,Huashong University of Science and Technology,Wuhan Hubei 430074,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2021年第12期1603-1608,共6页
Chinese Journal of Sensors and Actuators
基金
安康学院高层次人才科研启动项目(2020AYQDZR12)
陕西省教育厅项目(11JK0585)。
