Microwave Absorbing Improvement of Barium M-Hexaferrite by Ni Doping

Abstract

Variations of the doping ion Ni x = 0, 0.2, 0.4, and 0.6 have been successfully synthesized on Barium M-Hexaferrit (BaM) magnetic material using the solid-state reaction method and sintered at 1000 ^oC for 6 hours.  X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Vector Network Analyzer (VNA) were used to analyze phase changes and crystal size, morphological structure, and microwave absorption coefficients, respectively. The largest BaM phase was achieved at BaM x = 0.6, 92.23%, with a crystal size of 54,273 nm. Although BaM's surface morphological structure exhibits a uniform distribution of particles, some agglomerated particles form due to magnetic dipole interactions among particles. The addition of an Ni doping ion variation improves the reflection loss and absorption bandwidth in the X-Band of 8.2-12.4 GHz. The highest reflection loss of -29.7 dB and the highest absorption of 75.82% were recorded in the BaM x 0.6 phase over the frequency range of 9.66-10.93 GHz. According to the research findings, applying variations of the Ni doping ion to BaM material tends to increase the material's microwave absorption potential.