Abstract: As a novel magnetic material, barium hexaferrite had been widely used, especially using as microwave absorbing material. This article reviewed how to improve BaM microwave absorb property,such as doping metal ions, controlling particle morphology and size. Through doping metal ions in BaM or reducing particle size, the natural resonance could be shifted to low frequency. The opposite result could be got if the morphology of BaM is one-dimension.The synthesizing methods for barium hexaferrite, such as conventional ceramic, sol-gel, reverse micelle, hydrothermal and co-precipitation, were also presented. We analysed all these methods merits and faults.

Key words: BaFe_(12)O_(19)%synthesis%magnetic property%electromagnetic waves absorb