在水热合成α-Fe2O3十八面体和十二面体的基础上,以5%H2+95%N2为还原介质,通过控制还原条件制备出纯相Fe3O4十八面体和十二面体颗粒.用X射线衍射、扫描电镜、X射线光电子能谱、透射电镜和振动样品磁强计等手段对样品进行了表征.结果表明,颗粒表面氟离子吸附层的存在是其形貌保持较好的重要原因.与其它形貌的Fe3O4颗粒比较,本文合成的多面体Fe3O4颗粒矫顽力较高,主要归因于吸附的氟离子层和材料的形貌结构.
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