Ag3PO4 sub-microcubic/SrFe12O19 hexagon nanoflake heterostructure for broadband electromagnetic absorber at GHz frequency

The synthesis of Ag3PO4/SrFe12O19 heterostructure is reported, in which Ag3PO4 sub-microcubic grows on the surface of SrFe12O19 nanoflake. The microwave absorption performances of the heterostructure are investigated in 2-18 GHz. Due to the complementary phenomenon between the dielectric loss and magnetic loss, the sum values of dielectric loss factor and magnetic loss factor almost keep a constant, indicating no change of loss ability on microwave. The heterostructure exhibits the broad effective bandwidth of 5.2 GHz at 2.3 mm, covering 12.4-17.4 and 17.8-18.0 GHz. The theoretical simulations reveal the interfacial polarization leads to the outstanding microwave absorbing performances.