钡铁氧体与羰基铁复合材料的吸波性能研究

The Absorption Performance of Composite Materials Combining with Barium Ferrite and Carbonyl Iron

摘要: 本文制备了钡铁氧体和羰基铁复合材料作为吸波材料，分析讨论了钡铁氧体在复合材料中不同含量对复合材料在2~18 GHz波段的电磁参数及吸波性能的影响。结果表明：随着钡铁氧体含量的减少，介电常数先增大后减小，在钡铁氧体含量为25%时达到最大。在2~7 GHz频段，磁导率随钡铁氧体含量的减少而增加，在7~18 GHz频段，磁导率随钡铁氧体含量的减少而减少；当钡铁氧体含量为50%，厚度为1.7 mm，最小反射损耗为−41 dB,有效吸收频率为9.2~14.9 GHz，带宽达5.7 GHz，复合材料的吸波性能最佳。

Abstract: In this work, composite materials combined with Barium ferrite and carbonyl iron were prepared as absorbing materials. The influence of different contents of barium ferrite in the composite materials on the electromagnetic parameters and absorption performance in the 2~18 GHz band was analyzed and discussed. The results show that as the content of barium ferrite decreases, the dielectric constant first increases and then decreases, reaching its maximum at a barium ferrite content of 25%. In the 2~7 GHz frequency band, the magnetic permeability increases with a decrease in barium ferrite content, while in the 7~18 GHz, the magnetic permeability decreases with a decrease in barium ferrite content; When the content of barium ferrite is 50%, with the thickness of 1.7 mm, the minimum reflection loss is −41 dB and the effective absorption frequency is 9.2~14.9 GHz. The composite material has the best absorption performance.