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用W/O微乳液法制备了CoSmxFe2-xO4(x=0.00,0.02,0.04,0.06,0.08,0.10)铁氧体纳米粉晶。用X射线衍射仪(XRD),透射电子显微镜(TEM)、振动样品磁强计(VSM)和阻抗/材料分析仪表征了样品的结构、形貌和电磁性能。结果表明,掺杂少量Sm3+对样品的晶体结构没有影响,但其晶粒尺寸、饱和磁化强度、矫顽力和电磁损耗性能等都有不同程度的改变。样品的晶粒尺寸随Sm3+含量的增加而减小,在35~20 nm之间变化;而饱和磁化强度随着钐掺杂量的增加呈先减小后增大的变化趋势(x=0.00→0.04→0.08,Ms=52.95→51.03→52.56emu.g-1);当钐掺杂量x分别等于0.6和0.4时,其磁损耗性能和电损耗性能在1 MHz~1 GHz的频率范围达到最大,且低频区优于高频区。
CoSmxFe2-xO4 (x = 0.00,0.02,0.04,0.06,0.08,0.10) ferrite nano-powder was prepared by W / O microemulsion method. The structure, morphology and electromagnetic properties of the samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM) and impedance / material analyzer. The results show that the doped Sm3 + has no influence on the crystal structure of the samples, but the grain size, saturation magnetization, coercivity and electromagnetic loss properties of Sm3 + have different degrees of change. The grain size decreases with the increase of Sm3 + content and varies from 35 to 20 nm. The saturation magnetization decreases first and then increases with the increase of samarium doping amount (x = 0.00 → 0.04 → 0.08, Ms = 52.95 → 51.03 → 52.56 emu.g-1). When the samarium doping amount x is equal to 0.6 and 0.4 respectively, the magnetic loss performance and electric loss performance reach the maximum in the frequency range from 1 MHz to 1 GHz , And the low frequency area is better than the high frequency area.