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以1,2-十六烷二醇(HDD)作为表面活性剂,采用热分解方法制备CoFe_2O_4纳米颗粒。利用X射线衍射、透射电镜、振动样品磁强计对CoFe_2O_4纳米颗粒的结构、表面形貌和磁性进行分析,研究HDD对CoFe_2O_4纳米颗粒的结构和磁性的影响。结果表明,通过HDD的加入,可提高CoFe_2O_4纳米颗粒的分散性,调控CoFe_2O_4纳米颗粒的形状和尺寸。随着CoFe_2O_4纳米颗粒尺寸的减小,样品的矫顽力和饱和磁化强度降低。
With 1, 2-hexadecanediol (HDD) as surfactant, CoFe2O4 nanoparticles were prepared by thermal decomposition method. The structure, surface morphology and magnetic properties of CoFe 2 O 4 nanoparticles were analyzed by X-ray diffraction, transmission electron microscopy and vibrating sample magnetometer to study the effect of HDD on the structure and magnetic properties of CoFe 2 O 4 nanoparticles. The results show that the addition of HDD can improve the dispersion of CoFe 2 O 4 nanoparticles and control the shape and size of CoFe 2 O 4 nanoparticles. With the decrease of the size of CoFe2O4 nanoparticles, the coercivity and saturation magnetization decrease.