Investigation The Effect Of Polyethylene Glycol and Polymethyl Methacrylate Surfactants On The Physical And Radar Absorption Properties (X and Ku Bands) Of Barium Hexaferrite Synthesized By Sol-Gel Combustion Method

In this research the effect of polyethylene glycol and Polymethyl methacrylate surfactants were investigated on physical and radar absorption properties of barium hexaferrite synthesized via Sol-gel combustion method. In order to scrutiny investigate the phase, morphology and magnetic properties of final product X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM) were used respectively. Also, electromagnetic parameters of synthesized samples were evaluated by using a vector network analyzer (VNA) device in the radar bands of X and Ku. As a result, the presence of polyethylene glycol as a surfactant has strongly influenced on the final phase purity. SEM represents the hexagonal particle morphology was prepared for all samples. According to the magnetic studies the greatest amount of saturation magnetization (56emu/g) and coercivity (5240 Oe) was achieved for the sample synthesis in the presence of Polyethylene Glycol. PEG sample X band in frequencies 11.5GHz and 10.6 GHz had the highest Reflection loss -1.5 dB and -1.8 dB. The width of the absorption of polyethylene glycol was better than the other two. In Ku Band the maximum absorbance value belonged to Poly (methyl methacrylate) sample which has Reflection loss -2.2 dB in frequency 17.1 GHz. Therefore, the absorption results have shown an increase in the broadband absorption in the case of using both surfactants in X and Ku bands.