sol-gel法制备ZnFe_2O_4及其NO_2气敏性能的研究  

Preparation of ZnFe_2O_4 via sol-gel method and study on its NO_2 gas sensing property

作　　者：章东兴[1] 简家文[1] 王金霞[2] 沈杰[1] 高建元[1] 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211 [2]宁波工程学院电子与信息工程学院,浙江宁波315016

出　　处：《电子元件与材料》2009年第11期16-19,共4页Electronic Components And Materials

基　　金：浙江省自然科学基金资助项目(No.Y1080430)

摘　　要：采用sol-gel法制备了尖晶石结构的ZnFe2O4粉体,以其为电极材料在钇稳氧化锆陶瓷片(YSZ)上利用丝网印刷技术制备了片式NO2传感器,并对传感器在不同NO2浓度和不同温度下的输出电动势E和响应时间进行了研究。结果显示:在φ(NO2)为(68～494)×10–6范围内,E随着NO2浓度的增大而增大,并与NO2浓度的对数呈现良好的线性关系。在600℃高温时,传感器上升和下降响应时间分别为60和120s,且重复性较好。但随着工作温度的升高,传感器的灵敏度下降。In this study, ZnFe2O4 powders with spinel structure were prepared by the sol-gel method, and planar NO2 sensor with obtained ZnFe2O4 powders as electrode material was fabricated on yttria-stabilized zirconia （YSZ） ceramics chips by means of screen-printing. The output voltage E and response time of prepared sensors were studied under conditions of different NO2 concentrations and temperatures. The results show that, when the NO2 concentration is in the range of 68-494×10^-6, E increases with increasing NO2 concentration and is proportional to the logarithm of NO2 concentration. At 600℃, the up and down response time of sensor are 60 s and 120 s, respectively, with good repeatability. However, the sensitivity of sensor decreases with increasing working temperature.

关 键 词：ZNFE2O4 sol—gel法 NO2传感器 气敏性能 响应时间 

分 类 号：TP211.2[自动化与计算机技术—检测技术与自动化装置]