Effect of microcosmic regulation of unit cells bonding on microwave absorption properties of perovskite structure GdFeO3

GdFe1-xNixO3 material with perovskite structure was prepared using organic monohydrated citric acid-assisted sol-gel self-propagating combustion method to obtain high-efficiency microwave absorption material with thin thickness and wide effective absorption band. The influence of the introduction of Ni on dielectric properties and permeability was further studied. Experimental results show that with the introduction of 10% Ni, the lowest reflection absorption loss value of -49.5 dB is obtained, but the absorption bandwidth is only 0.89 GHz. When Ni is 15%, the lowest reflection absorption loss value of -38.8 dB is obtained, and the effective bandwidth (<-10 dB) is 5.32 GHz. The structure of GdFe1-xNixO3 perovskite was analyzed to explore structural changes in the process of Ni replacing Fe. The influence of strong interaction force, residual magnetization, and natural resonance of ceramic nanoparticles on microwave absorption performance was explored. This work provides a reliable candidate material for the synthesis of electromagnetic attenuation ceramic materials with excellent properties.