以无水乙醇为隔离剂，通过湿法球磨制备了片型羰基铁粉，研究了球料比对片型化过程、电磁性能的影响。结果表明：增加球料比，羰基铁粉片型化更充分，晶粒尺寸减小；粒子的各向异性提高了片型羰基铁粉的微波电磁性能。以环氧树脂为基体树脂，填充体积分数30％的吸波剂制备了1．0mm 单层吸波涂层，在 X-Ku 波段反射率小于－7．5dB 的带宽大于10GHz，涂层最小面密度为2．96kg ／m2。
The flake-shaped carbonyl iron powder(FCIP)was prepared by wet ball mill method with ethanol as isolation agent(0.1 nm).The influence of the ratio of ball to powder on the flake-shaped process and electromagnetic parameter was studied.The results show that the grain size of FCIP gradually is decreased and the anisotropy is increased significantly with the enhancing of the ratio of ball to powder.The dielectric loss and magnetic loss microwave performance are enhanced significantly attributed to the anisotropy of the FCIP.Epoxy resin is applied as bonders.The single-layer microwave absorbing coating with 1 .0 mm in thickness is prepared by u-sing epoxy resin as a matrix and the FCIP with the volume fraction of 30%.The lightest coating weights 2.96 kg /m2 ,when it meets the request of band width more than 10 GHz,and the reflectivity is less than -7.5 dB at the frequency range of 8-18 GHz.
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