溶液法和反胶束法制备Fe-B颗粒的结构和磁性能

Microstructure and Magnetic Property of Fe-B Nanoparticles Prepared by Solution and Reverse Micelle Methods

采用溶液法和反胶束法合成Fe-B磁性纳米颗粒。通过XRD、TEM、ICP、VSM等手段,依次对Fe-B纳米颗粒的结构、形貌、成分、磁性能进行表征,并针对两种方法所得结果进行对比分析。采用溶液法制备的Fe-B纳米颗粒为晶体结构,颗粒尺寸在20～70nm;反胶束法合成的Fe-B磁性纳米颗粒一般为非晶结构,颗粒尺寸细小(约5nm)。ICP颗粒成分分析结果表明,两种方法制备的Fe-B颗粒中B含量不同,溶液法制备的Fe-B颗粒中B含量约为17.8at%;而反胶束法制备的Fe-B颗粒,其B含量较高,达34.9at%。上述结构、颗粒尺寸和B含量的差异,导致了两种方法合成的Fe-B颗粒在磁性能方面的差别。

Fe-B nanoparticles were synthesized by using solution and reverse micelle methods. The structures, the B contents and the magnetic properties of the particles have been characterized by XRD, TEM, ICP, VSM, etc. It is found that the difference in magnetic properties of Fe-B nanoparticles fabricated by the two methods is mainly caused by the structure, the B content and the particle size. The Fe-B particles fabricated by solution method are crystalline with a size range of 20-70 nm, and the B content is about 17.8 at%; and the Fe-B particles prepared by reverse micelle method are usually non-crystalline with a size much smaller （about 5 nm）, the B content is about 34.9 at%.