用溶胶-凝胶法制备锰锌掺杂Z型钡钴铁氧体Ba3（MnZn）xCo2（1-x）Fe24O41（x=0.0、0.1、0.2、0.3、0.4、0.5）样品。用XRD和SEM对样品的晶体结构、颗粒形貌进行表征,用微波矢量网络分析仪测试该样品在2～18GHz微波频率范围的复介电常数、复磁导率,根据测量数据计算电磁损耗角正切及反射率,探讨该材料的微波吸收性能与电磁损耗机理。结果表明样品为Z型六角铁氧体晶体结构,颗粒呈六角片状形貌;当样品厚度为2.2mm、x=0.4时,在频率3.9GHz处吸收峰值为38.5dB,10dB以上频带宽度为3.8GHz;该材料能在1～5.8GHz微波低频范围实现有效吸收,其微波吸收兼具磁损耗和介电损耗,但磁损耗更为显著。%The samples of MnZn-doped Z-type barium ferrite Ba3（MnZn）xCo2（1-x）Fe24O41（x=0.1,0.2,0.3,0.4,0.5） were prepared by sol-gel process.The crystal structure and surface morphology of the particles were characterized by X-ray diffraction（XRD） and scanning electron microscope（SEM）,respectively.Their complex dielectric constant and complex permeability were measured by microwave vector network analyzer in the frequency range from 2 to 18GHz,the reflection coefficient and loss tangent were calculated according to measurements,and the microwave absorbing properties and the electromagnetic loss mechanism of samples were studied.The results showed that Z-type hexaferrite crystal structure was formed and powder morphology was micro-hexagonal flake for this samples,and the absorption peak was 38.5dB at 3.9GHz and the bandwidth above 10dB was 3.8GHz when sample thickness was 2.2mm and x=0.4.This material that can effectively achieve the microwave absorption in 1-5.8GHz low frequency range had both magnetic loss and dielectric loss,but the former was more significant.
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