Barium ferrite (BaFe12O19) particles were prepared using microwave hydrothermal synthesis with Fe(NO3)3 and Ba(NO3)2 as starting materials. The phase composition, crystallography and morphology of BaFe12O19 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), differential scanning caborimetry (DSC), FT-IR spectra and vibrating-sample magnetometer (VSM). The results showed that nanosized hexagonal barium ferrite was synthesized when Ba/Fe ratio molar was 1 : 8 and annealed at 900 οC for 30 minutes. Meanwhile the different morphologies of BaFe12O19 could be influenced by Ba/Fe molar ratio and reaction time. For sample, the saturation magnetization (σs) was 61 emu/g, coercive force (Hc) was 4800 Oe.

Keywords: Microwave hydrothermal, Barium ferrite, Magnetic property