中文摘要：

以氯化亚铁为前驱物，1，2-丙二醇为还原剂，采用多元醇法意外获得Fe3O4纳米粒子。通过X射线衍射分析标定了获得样品的物相为面心立方结构的Fe3O4，用透射电镜观察了样品的形貌，颗粒形貌为球形，大小为50～70nm，反应机理的研究表明，Fe^2＋发生了歧化反应，反应主要向氧化的方向进行。用振动样品磁强计表征了样品的静磁性能，测得的饱和磁化强度为74．30A·m^2／kg，矫顽力仅为102．68A／m，粒子具有超顺磁性。

英文摘要：

Fe3O4 nanoparticles were prepared unexpectedly by polyol process using FeCl2 · 4H2O as precursor, 1, 2- propylene glycol as reducer. The as-prepared sample was characterized by XRD analysis. The morphology observed by TEM showed that the shape of Fe3O4 nanoparticles was,the size of them was 50-70nm. The reaction mechanism research showed that the disproportionation of Fe^2＋ ions had occurred and the Fe^2＋ ions had been oxidized to produce Fe3O4 nanoparticles. The hysteresis loop measured by VSM showed that the saturation magnetization was 74.30A · m^2/kg,the coercivity was 102.68A/m which was shown that the Fe3O4 nanoparticles were superparamagnetic.