The paper presents the results of a study phase composition and main static magnetic characteristics: saturation magnetization, residual magnetization coercive force polycrystalline ferroxplana type hexaferrites Ba2Ni2-xCuxFe12O22 (0 ≤ x 2.0) system. These materials have high permeability are promising for use as substrates antennas radar absorbing materials. It is shown that thermograms initia...