The Ni-Zn-La ferrite/ polyaniline nanocomposite was prepared by in-situ polymerization method under the ultrasonic field. The structural characteristics, morphology and electromagnetic properties of the composites were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM) and HP8510 network analyzer, respectively. The results indicate that HC1 doped polyaniline has some degree of crystallinity. There is some interaction between the Ni-Zn-La ferrite particles and polyaniline chains. The imaginary part of complex permittivity and dielectric loss tangent of the Ni-Zn-La ferrite/ polyaniline nanocomposite are higher than those of polyaniline. The real part of permittivity is less than polyaniline. The imaginary part of complex permeability and magnetic loss tangent of the Ni-Zn-La ferrite/ polyaniline nanocomposite are higher than those of polyaniline above 8. 4GHz.%采用超声场下原位聚合法制备了Ni-Zn-La铁氧体/聚苯胺纳米复合材料.其结构、形貌和电磁性能分别采用X射线衍射仪(XRD)、扫描电镜(SEM)和HB8510网络矢量分析仪进行了研究.结果表明:盐酸掺杂后的聚苯胺是部分结晶的；Ni-Zn-La铁氧体与聚苯胺分子链之间存在某些相互作用；与聚苯胺相比,Ni-Zn-La铁氧体/聚苯胺纳米复合材料的复介电常数的实部ε′值减小、虚部ε″值增大、介电损耗角正切值tanδε增大.在高于8.4GHz的频率范围内,Ni-Zn-La铁氧体/聚苯胺纳米复合材料的复磁导率的虚部μ″值和磁损耗角正切值tarδm均高于聚苯胺.
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