Preparation and microwave absorption properties of Fe3+ doped LaNiO3 perovskite ceramics

Abstract

Fe3+doped lanthanum nickelate perovskite ceramics were prepared by sol-gel method. Scanning electron microscope（SEM），energy dispersive spectrometer（EDS）and diffractometer（XRD）were used to characterize the micro morphology，element distribution and phase of Fe3+doped lanthanum nickelate. The electromagnetic parameters of Fe3+ doped lanthanum nickel oxide ceramics were measured by using vector network analyzer， the absorption performance was simulated，and the influence of Fe3+ doping amount on the absorption mechanism of lanthanum nickel oxide perovskite ceramics was studied. The XRD results indicate that Fe3+ ions successfully occupy the lattice position of Ni3+ ions，forming perovskite structured ceramics. The SEM results indicate that Fe3+ doping has little effect on the particle morphology of LaNiO3 ceramic material，while the EDS results confirm that the distribution of Fe element in LaNiO3 ceramic material is uniform and non-agglomerated. In terms of absorption performance，the optimal doping amount of Fe3+ doped LaNiO3 ceramic material is 0.05，with a matching thickness of 1.40 mm and a maximum peak value of –18.145 dB. The frequency bandwidth below –10 dB is 1.42 GHz（9.38-10.8 GHz）.

Keywords

• fe3+doping
• sol gel method
• lani1–xfexo3 ceramics
• absorbing performance