硅酸盐学报2011，Vol.39Issue(9)：1428-1433,6.
La_2O_3表面修饰NiFe_2O_4的制备及气敏性能
Preparation and Gas Sensing Properties of NiFe_2O_4 Modified La_2O_3
摘要
Abstract
Nickel ferrite nano-powders prepared by low-temperature solid-state reaction method were modified by dipping method with La2O3 rare-earth oxide.Crystal structure and morphology of samples were characterized by X-ray diffraction,scanning electron microscopy,and X-ray photoelectron spectroscopy.Sensitivity properties of samples modified by La2O3 rare-earth oxide with different dosages were also investigated.Results reveal that La2O3 has an amorphous structure,and NiFe2O4 sensors modified with 4% La2O3 in mass have better sensitivity of 24.5,at a lower working temperature of 150 ℃,to 1 000 μL/L alcohol gas;therefore,the sensitivity is up to 36 at 250 ℃,to 1 000 μL/L acetone gas,and response–recovery time are 1 s and 10 s,respectively.The results indicate that modification with La2O3 rare-earth oxide can be used to develop a new gas sensor that works at low temperature.关键词
氧化镧/镍铁氧体/低温固相反应/浸渍法/气敏性Key words
lanthanum oxide/nickel ferrite/low temperature solid state reaction/dipping method/gas sensing分类
通用工业技术引用本文复制引用
焦万丽,张磊..La_2O_3表面修饰NiFe_2O_4的制备及气敏性能[J].硅酸盐学报,2011,39(9):1428-1433,6.基金项目
山东省中青年科学家科研奖励基金(2006BS04035)资助项目 （2006BS04035）
