Absorption Properties of Composite Materials for the Encapsulation of Nano- Ferroferric Oxide in Mesoporous Materials

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.