Nano-ferroferric oxide (Nano-Fe3O4) can be used as a ferrite absorbing material when exposed to microwave
absorption due to its high magnetic permeability. However, a single nanometer-sized material has a narrow
frequency range for its reflection absorption wave during the secondary polymerization process used for preparing
nanomaterials. In this study, mesoporous materials and nano-Fe3O4 were used to prepare a nano-Fe3O4
mesoporous composite, which employs the complex permeability of the material to improve the absorption performance
of the composites. The materials were characterized and the influence of absorption performance from
chemical coprecipitation and encapsulation of suspension polymerization were investigated. The experimental results
indicate that suspension polymerization produces materials with enhanced microwave absorption compared to
chemical coprecipitation. In addition, results show that “microscopic structure trigger loss of resonance” is critical for the absorbance of
composite materials. Furthermore, the eigen frequency of nano-Fe3O4was calculated.
Keywords: Mesoporous materials, nano-Fe3O4, composite materials, microwave absorption.
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