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以化学法制出了一种立方状的 Fe_3O_4超细粒子,其生成与化学制备过程中 Na~(+1)的浓度有关.立方状 Fe_3O_4粒子与具有同其大致相同尺寸的球状 Fe_3O_4粒子相比,矫顽力较高,而比饱和磁化强度则较低.
A cubic Fe_3O_4 ultrafine particle was chemically synthesized and its formation was related to the concentration of Na ~ (+1) during the chemical preparation.Compared with the spherical Fe_3O_4 particles with the same size, the cubic Fe_3O_4 particles, The coercivity is higher than the saturation magnetization is lower.