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1 Materials Science Poland

1 2010

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Preparation and microwave absorption of M type ferrite nanoparticle composites

Shen G. Z., Cheng G. S., Cao Y., Xu Z.

Materials Science Poland

2010

Vol. 28, No. 1

327--334

The sol-gel method was used to obtain M type BaFe12O19 ferrite nanoparticles. Rod like and flake like ferrite nanoparticles can be successfully fabricated by controlling the heating process of the precursor. The phase attributes, morphology and grain size of BaFe12O19 ferrite were characterized by TEM and XRD. The complex permittivity and permeability of ferrite epoxy resin composites were measured in the Ku waveband (12.4-18 GHz). Ferrite composites containing short carbon fibres have also been fabricated in order to obtain higher complex permittivities of the composites. The reflectivities of these ferrite composites were calculated according to the measured electromagnetic parameters. The results show that the microwave absorption properties of ferrite composites can be effectively improved by filling them with short carbon fibres.