Electromagnetic properties of BaZn2Fe16O27/antimony-doped tin oxide composite absorbing materials by co-precipitation method

Abstract

W-type barium ferrite (BaZn2Fe16O27)/antimony-doped tin oxide (ATO) composite absorbing materials were synthesized by co-precipitation method, using BaZn2Fe16O27 prepared by traditional solid method and SnCl4·5H2O, SbCl3 as main raw materials. The structure and morphology of the composites were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM). The result shows that BaZn2Fe16O27/ATO composites were obtained by co-precipitation method, and ATO nano-particles were coated on the surface of BaZn2Fe16O27 ferrite. The complex permittivity and complex permeability of BaZn2Fe16O27/ATO composite absorbing materials at the frequency range from 2 to 18 GHz were analyzed by vector network analyzer. It is indicated that ATO has strong dielectric property and ferrite shows superior magnetic performance. The result shows that the complex permittivity and dielectric loss of the BaZn2Fe16O27/ATO composite absorbing materials are higher than the pure ferrite, and the complex permeability and magnetic loss are higher than the pure ferrite and the pure ATO. When the mole ratio of BaZn2Fe16O27/ATO is 1:2, the minimum reflection loss is about −31.14 dB at 12.4 GHz, moreover, the absorption bandwidth reaches 9.6 GHz when RL is −10 dB in the measured frequency range of Ku-band.