Fabrication and microwave absorption properties of BaTiO3 -SrTiO3-Ni0.5Zn0.5Fe2O4 polymer nanocomposites

Abstract

In this present work, barium titanate (BaTiO3), strontium titanate (SrTiO3) and nickel zinc ferrite (Ni0.5Zn0.5Fe2O4) were used to prepare electromagnetic wave absorption composite. Homogeneous polymer composites containing of BaTiO3 -SrTiO3 – Ni0.5Zn0.5Fe2O4 was produced by the physical mixing method. Surface morphology of polymer composites was characterized by scanning electron microscopy (SEM). Microwave absorbing and electromagnetic parameters were recorded by vector network analyzer (VNA).The influence of the ratio of nickel-zinc magnetic particles into the dielectric materials was studied. Microwave absorption properties of polymer composites were determined by complex permittivity measurement and the effects of the barium titanate, strontium titanate and nickel-zinc magnetic particles on the microwave absorption properties were examined in the frequency range of 2–16 GHz. Real and imaginary parts of complex permittivity and permeability were determined by reflection/transmission technique. The dielectric interactions between two different dielectric materials were investigated and the role of Ni0.5Zn0.5Fe2O4 ferrite in the composite has been explored. Results showed that The RL of absorber composites with thickness of 3.0 mm reached a maximum value of −9.47 dB in the frequency range from 2.00 to 16.00 GHz and demonstrated that the nanocomposites could be use as electromagnetic absorber.