材料期刊网

Fe3O4是一种重要的磁性材料.由于其独特的光、电、磁、热等性能而备受关注.在本文中,我们采用水热溶剂热法合成了Fe3O4磁性纳米粒子.利用X-射线衍射仪（XRD）、场发射扫描电子显微镜（FESEM）和振动样品磁强计（VSM）对产物的结构、形貌及磁性能进行了研究.结果表明,通过前驱物的适当选择,可以实现Fe3O4纳米粒子的可控合成,我们获得了球形、四方体形及棒形等不同形貌的具有尖晶石结构的Fe3O4纳米粒子.磁测量结果分析表明,形貌不同的Fe3O4纳米粒子其磁性能也有所不同.棒形和四方体形貌的Fe3O4纳米粒子的饱和磁化强度都比球形Fe3O4纳米粒子的饱和磁化强度高,其中纳米棒的最高.四方体形Fe3O4纳米粒子的矫顽力明显高于其他形貌的Fe3O4纳米粒子.

Fe3O4 is a very important magnetic material,which has attracted more and more attention for their unique optical,electrical,magnetic,thermal properties.In this paper,magnetic Fe3O4 nanoparticles was synthesized via hydrothermal and solvothermal routes.The structure,morphology and magnetic properties of the as-synthesized products were investigated by X-ray diffraction（XRD）,field emission scanning electron microscope（FESEM） and Vibrating sample magnetometer（VSM）.The results show that Fe3O4 nanoparticles of spinel structure with different morphologies,including sphere,cube and nanorods have been synthesized in a controllable way via using different starting materials.Magnetic measurement results analysis indicates that Fe3O4 nanoparticles with different morphologies have different magnetic properties.The rod-shape and cube-shape Fe3O4 nanoparticles have higher saturation magnetization than that of spherical Fe3O4 nanoparticles,and the saturation magnetization of the rod-shape Fe3O4 nanoparticles is highest.The coercivity of cube-shape Fe3O4 nanoparticles is significantly higher than that of the Fe3O4 nanoparticles with other morphologies.