摘要
利用固体电解质物质的量浓度为8%的Y_2O_3掺杂的ZrO_2(8YSZ)和敏感材料WO_3制备了片式混合电势型NH_3传感器(简称8YSZ-WO_3传感器),分别在600、650、700和750℃温度下进行煅烧,获得相应的敏感电极,探讨了不同煅烧温度下敏感电极微观结构以及传感器性能的变化,并对传感器的工作机理进行了研究分析。当煅烧温度为700℃时,敏感材料晶粒间形成贯通的孔道,器件性能最佳,其中在测试温度550℃下,该传感器对250×10^(-6) NH_3的响应信号大小为59.35 mV,灵敏度为52.65 mV/decade,并且该传感器遵循混合电动势理论。
A mixed-potential NH3 sensor based on an 8 mol% yttria-stabilized zirconia (8YSZ) plate and a WO3 electrode (8YSZ-WO3 sensor) was fabricated and studied.The effects of electrode calcination temperature on the performance of the sensor were investigated.The microstructures of the electrode and the change of the sensor performance were investigated at calcination temperatures of 600,650,700 and 750 ℃ respetively.And the working mechanism of the sensor was analyzed.It was found that the sensor had the best performance when the calcination temperature was 700 ℃,and the response value of the sensor to 250×10^-6 NH3 was 59.35 mV at 550 ℃ and the sensitivity was 52.65 mV/decade.Furthermore,the sensor was identified to be consistent with the mixed-potential model.
作者
张晶晶
张骋
李学娇
李强
ZHANG Jingjing;ZHANG Cheng;LI Xuejiao;LI Qiang(School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Advanced Materials Institute,Qilu University of Technology (Shandong Academy ofSciences),Jinan 250014,China;Shanghai Research Institute of Fragrance & Flavor Industry,Shanghai 200232,China;School of Chemistry and Molecular Engineering,East China Normal University,Shanghai 200241,China)
出处
《应用技术学报》
2019年第1期35-41,共7页
Journal of Technology
基金
上海应用技术大学协同创新基金(XTCX2017-4)资助
关键词
煅烧温度
氨气传感器
混合电动势
calcination temperature
ammonia gas sensor
mixed-potential
