CAJ | 학술논문

采用sol-gel法制备了尖晶石结构的ZnFe_2O_4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NO_2传感器,并对传感器在不同NO_2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(NO_2)为(68 ～ 494)×10~(-6)范围内,E随着NO_2浓度的增大而增大,并与NO_2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120 s,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.
채용sol-gel법제비료첨정석결구적ZnFe_2O_4분체,이기위전겁재료재을은양화고도자편(YSZ)상이용사망인쇄기술제비료편식NO_2전감기,병대전감기재불동NO_2농도화불동온도하적수출전동세E화향응시간진행료연구.결과현시:재φ(NO_2)위(68 ～ 494)×10~(-6)범위내,E수착NO_2농도적증대이증대,병여NO_2농도적대수정현량호적선성관계.재600 ℃고온시,전감기상승화하강향응시간분별위60화120 s,차중복성교호.단수착공작온도적승고,전감기적령민도하강.
In this study, ZnFe_2O_4 powders with spinel structure were prepared by the sol-gel method, and planar NO_2 sensor with obtained ZnFe_2O_4 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 NO_2 concentrations and temperatures. The results show that, when the NO_2 concentration is in the range of 68～494×10~(-6), E increases with increasing NO_2 concentration and is proportional to the logarithm of NO_2 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.