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以FeCl3,C2H2O4,NaOH为原料,采用水热法200℃反应12 h制备得到了α-Fe2O3纳米晶自组装的球形颗粒。利用X射线衍射仪、扫描电镜和透射电镜对所得产物进行了表征分析,并在室温下测量了其磁学性能。结果表明,所制备的α-Fe2O3纳米晶自组装的球形颗粒为三方晶系的单晶结构,其平均尺寸为300 nm。在室温下测试了球形颗粒的磁学特性,其矫顽力和剩余磁化强度分别为1543.34 Oe和0.10 emu/g,并根据α-Fe2O3纳米晶的形成与组装过程中的作用,并提出了可能生长机理。
FeCl3, C2H2O4, NaOH as raw materials, the use of hydrothermal method at 200 ℃ for 12 h prepared by the α-Fe2O3 nanocrystalline self-assembled spherical particles. The obtained product was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The magnetic properties were measured at room temperature. The results show that the prepared spherical particles of α-Fe2O3 nanocrystals have a single-crystal cubic structure with an average size of 300 nm. The magnetic properties of spherical particles were tested at room temperature. The coercive force and remanent magnetization were 1543.34 Oe and 0.10 emu / g, respectively. Based on the role of α-Fe2O3 nanocrystal in the formation and assembly process, Growth mechanism.