摘要
用微乳液法合成了纳米In2O3粉体,浸渍法制备了5%(inmass)La2O3掺杂In2O3。利用X射线衍射、透射电镜对合成产物进行了结构表征。采用静态配气法对氧化铟气敏元件的气敏特性进行了测试。结果表明:微乳液法合成的氧化铟经600℃,5h煅烧后,颗粒尺寸约为30nm,且分布均匀。氧化铟气敏元件对汽油、酒精、甲醛等有机蒸气具有较高的检测灵敏度,但选择性不好。氧化镧掺杂后,不同温度工作时,氧化铟分别对汽油、酒精有较好的选择性,且响应恢复快。
Indium oxide nanopowder doped with 5% (in mass) La2O3 was prepared by an impregnation method and using In2O3 obtained by a microernulsion technique. The structure and morphology of the powder product were characterized by X-ray diffraction and transmission electron microscopy, respectively. Gas sensing properties of In2O3 samples were measured by a gas match method at the static state. The results show that the homogeneous indium oxide nanopowder sintering at 600°C were obtained by sintering at 600°C and its particle size is about 30 nm. Pure indium oxide gas sensor has higher sensitivity to alcohol, gasoline and HCHO, but it has poor gas selectivity. At different working temperatures, La2O3 doped indium oxide sensor can selectively detect alcohol and gasoline with satisfactory gas sensitivity and quick response and recovery characteristics.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2005年第7期832-836,841,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(20471055)
河南省杰出青年科学基金(03120000800)资助项目。
关键词
氧化铟
纳米材料
微乳液
气体传感器
稀土金属氧化物
Doping (additives)
Indium compounds
Microemulsions
Oxides
Transmission electron microscopy
X ray powder diffraction
