以柠檬酸为络合剂制备镍锌铁氧体溶胶，以活性炭为基体负载 Ni-Zn 铁氧体，再通过焙烧制备出形态和结构理想的活性炭/镍锌铁氧体复合材料；详细地考察烧结温度、煅烧气氛及活性炭与铁氧体的配比等工艺参数对复合材料的形态和结构的影响；分别采用X射线衍射(XRD)和扫描电镜(SEM)对制备出的复合材料进行形貌、结构表征分析.采用波导法在8．2~12．4 GHz波段对活性炭负载纳米镍锌铁氧体复合材料进行电磁参数测试，结果表明所制备活性炭负载镍锌铁氧体复合材料具有较高的电、磁损耗角正切值，其吸波性能较好.
The Ni-Zn ferrite sol was synthesized with citric acid as complexing reagent,and the ferrite and activa-ted carbon composite gel was obtained by vaporization treatment,then the activated carbon loaded with Ni-Zn ferrite composite was prepared by calcination treatment of the gel.The effect of process parameters such as the sintering temperature,sintering gas and ratio of carbon/ferrite on the morphology and structure of composite were studied in detail,in which the morphology,structure and compose of composite were characterized by scanning electron microscopy (SEM)and elements X-ray diffraction (XRD).Furthermore,the complex permit-tivity and permeability of the as-prepared composites were characterized in the frequency ranges of 8.2-12.4 GHz by the wave-guide method on the vector network analyzer,in which the higher electrical and magnetic loss tan-gent values of the activated carbon loaded with Ni-Zn ferrite composite were obtained.
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