Effects of various barium titanate additives on the electromagnetic wave absorbing behavior of FeSiBNbCu P/M sheets

The soft magnetic Fe73Si16B7Nb3Cu1(at%) powder with nanocrytalline structure and the dielectric BaTiO3 powders with different sizes and shapes were mixed to be cast as the absorbing sheets with polymer-based binders and solvent. Absorbing properties, such as complex permittivity and complex permeability of the powder sheets, were measured using a network analyzer and an impedance analyzer. As a result, Fe-based nanocrystalline powder sheets mixed with the nano-sized BaTiO3showed the improved characteristics as electromagnetic wave absorbers at the high frequency of ∼10 GHz. Accordingly, it can be concluded that the characteristics of dielectric BaTi3 particles affected the electromagnetic wave absorbing properties of Fe-based nanocrystalline P/M sheets.