CO2 sensing properties of La1-xBaxFeO3 thick film and packed powder sensors
CO2 sensing properties of La1-xBaxFeO3 thick film and packed powder sensors
复制标题
La1-xBaxFeO3 厚膜和填充粉末传感器的 CO2 传感特性
DOI：
10.1039/c5ra16509a
复制
发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Hu Jifan
中科院分区：
文献类型：
--
作者：
Li Ling;Qin Hongwei;Shi Changmin;Zhang Ling;Chen Yanping;Hu Jifan
We compared the CO2 sensing properties of La1−xBaxFeO3 packed powder and thick film sensors. The thick film sensor exhibits a larger response to CO2 gas with lower working temperature and shorter response and recovery times than the packed powder sensor because the former exposes a larger surface, absorbs the oxygen and interacts with CO2 gas more easily than the latter. However, the resistance of the thick film sensor is much larger than the packed powder sensor. La0.8Ba0.2FeO3 sensor exhibits the largest CO2 response among all La1−xBaxFeO3 packed powder and thick film sensors investigated. The response for the La0.8Ba0.2FeO3 thick film sensor to 2000 ppm CO2 at 150 °C is 2.29 and the response and recovery times are 14 s and 8 s, respectively. In addition, the CO2 responses for these two types of La0.8Ba0.2FeO3 sensors decrease with increase in the humidity. The possible sensing mechanisms of La1−xBaxFeO3 sensors are discussed.
