NiFe2O4/T-ZnOw复合材料的制备及电磁波吸收性能

摘要

采用铁氧体化学镀在四角氧化锌晶须(T-ZnOw)表面包覆NiFe2O镀层,制备了NiFe2O4/T-ZnOw复合材料.利用X射线衍射仪、扫描电镜、能谱分析仪对镀覆前后T-ZnOw的结构、形貌等进行了表征.利用矢量网络分析仪研究了NiFe2O4/T-ZnOw复合材料的电磁波吸收性能.结果表明,化学镀覆后,在T-ZnOw表面包覆了尖晶石型NiFe2O4镀层,生成了NiFe2O4/T-ZnOw复合材料,该材料为磁损耗型材料.化学镀覆过程中T-ZnOw的装载量会影响复合材料的介电常数和磁导率,当T-ZnOw装载量为0.2g时,所制备的复合材料具有最大的介电常数、磁导率、介电损耗和磁损耗,当吸收层厚度达到3mm时,反射率在14 GHz处达到-11 dB.%T-ZnOw/NiFe2O4 composites were prepared by encapsulating T-ZnOw with a NiFe2O4 film through ferrite plating. XRD, SEM and energy dispersion spectroscopy (EDS) were used to characterize the structure, morphology of T-ZnOw before and after plating. Vector network analyzer was used to measure the microwave absorbing properties of NiFe2O4/T-ZnOw composites. The results indicate that NiFe2O4/T-ZnOw composites are fabricated after plating by covering a layer of NiFe2O4(On the surface of T-ZnOw. The composites are magnetic loss materials. T-ZnOw loadings affect the permittivity and permeability of composites. The composites show maximum permittivity, permeability, dielectrical loss and magnetic loss when T-ZnOw loading is 0.2 g during plating. The reflection loss (R.L.) reaches -11 Db at 14 GHz when the thickness of absorbing materials is 3 mm.