MAGNETIC AND MICROWAVE ABSORBING PROPERTIES IN SEMI-HARD COXFE(3-X)O4 SYNTHESIZED BY SOL-GEL METHOD

Magnetic and microwave absorption properties of CoxFe(3-x)O4 semi-hard materials (x = 0.75, 1.0, 1.5) synthesized have been carried out using the chemical method sol-gel. The mixture iron nitrate Fe2(NO3)3 cobalt Co(NO3)2 dissolved in ethylene glycol, then was heated while stirring at 60 °C for 1 hour to form a gel. After that dried temperature 120°C 5 hours. A fine powder obtained through grinding process. crystallization done by sintering 1000 X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Vibrating-sample magnetometer (VSM), Vector Network Analyzer (VNA) is used investigate phase identification, particle morphology, magnetic properties, ability, respectively. Based on identification show samples with composition x 0.75 two phases, namely CoFe2O4 Fe2O3. sample ³ single CoFe2O4. morphology homogeneous spherical size about 100 – 500 nm. act ferromagnetic behavior saturation magnetization (Ms) 26.1-40.4 emu/g coercivity field (Hc) 223-299 Oe. maximum reflection loss (RL) value -14.03 dB frequency 10.98 GHz occurred single-phase 1.0. This study provided new composite material great potential development microwave-absorbing materials.