Development of radar absorbing nano crystals by microwave irradiation

Single phase M-type barium hexaferrite nano crystals of radar absorbing material i.e., BaFe12O19 were synthesized by a modified flux method under cyclic microwave irradiation. Uniform and ultrafast morphological transformation from spherical to pyramidal-faced nano crystals were noticed in field emission electron microscopy during the cyclic microwave irradiation power for constant time. The reflection loss of nano crystals in Ku band (12.4–18.0 GHz) were measured. Significant increments in reflection loss from − 15.23 to − 53.63 dB over a wide bandwidth were noticed during symmetric morphological growth of single phase nano crystals.