Structural and microwave attenuation characteristics of ZnCuY barium ferrites synthesized by a sol-gel auto combustion method

Ba2ZnCuFe12O22 (ZnCuY) barium ferrites were prepared using a sol-gel auto combustion method. Mixing the ferrite particles with various sintering temperature from 900 to 1200 °C, ferrite/silicone composite were fabricated. The phase structures, morphologies, magnetic and microwave properties were investigated for the as-prepared samples and the composites. The composites show considerable large permeability with µ′0 of 4.8 and µ″max of 1.7 at resonance frequency of 2.4 GHz. Also, they have good microwave attenuation properties with the percentage bandwidth of 106% for RL<−10 dB in a frequency range of 3-10 GHz with thickness of only 3.7 mm. Therefore, ZnCuY composites could be potential candidates for microwave attenuation applications.