采用原位化学沉淀法将Fe3O4与石墨复合,研究了不同复合比例对吸波性能的影响.结果表明:随着Fe3O4负载量的增加,复合材料中Fe3O4的X射线衍射峰增强;Fe3O4主要沉积在石墨表面,随着Fe3O4负载量的增加,对石墨表面的包覆越完整,但也有一些Fe3O4纳米颗粒散落在石墨颗粒之间;复合材料的介电常数随Fe3O4负载量的增大而减小,磁导率变化较小;在Fe3O4与石墨不同质量比复合材料中,质量比为5∶1和4∶1的复合材料表现出较好的吸波效果,在厚度为1.5mm时,质量比为5∶1样品吸收峰值达-31.9dB,大于-10dB的吸收频带宽为5.0GHz.
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