共沉淀法与水热法制备磁性四氧化三铁纳米颗粒的比较研究

A Comparative Study Between Coprecipitation Method and Hydrothermal Method Magnetic to Prepareferroferric Oxide Nanoparticles

本实验通过共沉淀法和水热法制备并表征四氧化三铁磁性纳米颗粒。考察了不同方法对生成物的影响作用。结果显示,两种制备方法到的产物均为反尖晶石结构,结晶度高;共沉淀法得到的Fe_3O_4纳米颗粒主要为大小较均匀的球形结构,纳米颗粒粒径约为12~15 nm,产物团聚现象较为明显;水热法制备的Fe_3O_4纳米颗粒为准球形状,粒径分布均匀,与共沉淀法合成Fe_3O_4纳米颗粒相比,水热法合成的Fe_3O_4纳米颗粒粒径明显增大,约到20 nm左右,团聚现象有缓解。

This experiment prepared by coprecipitation method and hydrothermal method and characterization of the ferromagnetic oxide nanoparticles. The effect of different methods on the products was investigated. Results show that the product of two kinds of preparation methods to are inverse spinel structure,high crystallinity. Coprecipitation method of Fe_3O_4 nanoparticles are uniformly mainly for the size of the spherical structure,about 12 ~ 15 nm nano particle size,product reunion phenomenon is more obvious; Hydrothermal preparation of Fe_3O_4 nanoparticles is ball shape,uniform particle size distribution,and the precipitation synthesis of Fe_3O_4 nanoparticles compared to hydrothermal synthesis of Fe_3O_4 nanoparticles size increases obviously,about to about 20 nm,reunion phenomenon with ease.