Preparation and microwave absorption properties of nanosized Ni/SrFe12O19 magnetic powder

A new type of Ni-coated strontium ferrite powder was prepared with electroless plating enhanced by ultrasonic wave at room temperature. The morphology, crystal structure and microwave absorption properties of the Ni-coated powder were investigated with field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), EDS and vector network analyzer. The results show that the powder possesses excellent microwave absorption properties. The maximum microwave loss of the composite powder reaches –41.3 dB. The bandwidth with the loss above –10 dB reaches 8 GHz