以黄钠铁矾为原料,稀土掺杂改性制备镍锌铁氧体.通过X射线衍射(XRD)、扫描电镜(SEM)、红外光谱分析(FT-IR)和振动样品磁强计(VSM)等对镍锌铁氧体进行表征,探究稀土掺杂对镍锌铁氧体磁学性能的影响.结果表明:稀土掺杂后镍锌铁氧体的晶格产生畸变,但是尖晶石型的形貌没有变化,软磁性能提高.并且镝掺杂量与软磁性能提高呈现正相关.掺杂3%镝的镍锌铁氧体软磁性能最好,矫顽力为2.082 kA/m,剩余磁化强度1.73 A·m2/kg,饱和磁感应强度为42.59 A·m2/kg.
The Ni-Zn ferrites were synthesized with sodium jarosite residue through modified method of rare earth doping.The performances were characterized by X-ray diffraction(XRD), scanning electronic microscope(SEM), Fourier transform infrared spectrum(FT-IR) and vibrating sample magnetometer(VSM).The magnetic properties of Ni-Zn ferrite doped with rare earth were investigated.The results showed that the rare earth which has entered into the Ni-Zn ferrites could cause lattice distortion and soft magnetic properties improvement, while the spinel structure was not affected.There was a positive correlation between the amount of dysprosium and the improvement of soft magnetic properties.When the doping amount of dysprosium was 3%, the coercivity, saturated magnetization and remanence of Ni-Zn ferrites are 2.082 kA/m, 42.59 A·m2/kg and 1.73 A·m2/kg, respectively.The Ni-Zn ferrites exhibits best soft magnetic properties.
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