纳米In_2O_3的微乳液合成及酒敏性能

The C_2H_5OH Sensing Property of Nanosized In_2O_3 Prepared by Microemulsion Method

采用微乳液法制备超细In2O3粉体,粉体粒径为8 nm,在In2O3基体材料中掺杂Pd及金属氧化物,研制出实用性的热线型C2H5OH气敏元件,该元件功耗低(小于300 mW),选择性高,长期稳定性好。并考察了温度、湿度变化对气敏元件性能的影响,分析了元件的气敏机理。

The sensitive composite material was prepared by doping Pd and some metal oxides into ultrafine In2O3 matric material(8 nm) prepared by microemulsion method. A kind of selective C2H5OH gas sensor was developed based on a 'hot wire type' gas sensor commercially available. The sensor possesses low power consumption, high selectivity and desirable long term stability. The dependence of the sensor output characteristics on temperature and humidity was also studied, and the working mechanism was discussed.