Investigation on the Effect of B2O3 Additive on Microstructure and Magnetic Properties of Barium Hexaferrite

The effects of B2O3 addition (0, 0.2, 0.5, 1 and 2 wt %) on the change of microstructure and magnetic properties of barium hexaferrite (BHF) has been made and analyzed. The purpose of this work is to higher the magnetic properties of BHF by B2O3 additive. It was found that the distribution average diameter particle, true density, sintered density, and magnetic flux density of BHF are modified obviously as a small amount of B2O3 is added. The best quality of materials is obtained which 0.5 wt % B2O3 addition and showed excellent properties with average particle size of 1.78 µm , true density of 5.00 g/cm3, sintered density of 4,66 g/cm3, and flux density of 722.5 Gauss. Furthermore, the surface morphology by SEM revealed that the grain is around 1.2 µm and more homogeneity. The results can be interpreted that the preferential addition of B2O3 at low level is 0.5 wt%.