Corrugated core structure absorbing materialIt is an efficient material that absorbs electromagnetic waves, and its manufacturing method is similar to that of a honeycomb structure. By adjusting the geometric parameters of the corrugated structure, the absorbing performance of the material can be adjusted. In addition, it can also be combined with the foam core structure to further improve the wave absorption effect.
The production method of corrugated core structure absorbing material
The production method of corrugated core structure absorbing material is similar to that of honeycomb structure. Generally speaking, absorbing material coatings can be applied to the surface of corrugated structures, or absorbing composite materials can be directly used to make corrugated plate structures. By adjusting the geometric parameters of the corrugated structure, the absorption performance of the material can be precisely adjusted.
The special structure of corrugated board brings multiple absorption effects
Due to the unique structure of corrugated plates, electromagnetic waves undergo multiple absorptions within the structure, resulting in a better absorption effect. The corrugated structure can be combined with the foam core structure to fill the gap of the corrugated plate with light foam material. This can not only reduce the weight of the material, but also adjust the surface impedance of the material, thereby achieving better absorption effect.
Excellent absorption and mechanical properties of composite corrugated plates
Advanced Institute Technology has designed a copper wire made of epoxy resin/glass fiber and fishbone shape
Composite corrugated boardThe absorption/transmission composites were prepared by filling channels with polymethyl acrylate (PMI) foam. The research results indicate that this composite corrugated plate scheme can achieve broadband absorption (5.74~7.84 GHz), with absorption and transmission rates both exceeding 80%. At the same time, the addition of foam also significantly improved the mechanical properties of the structure, and obtained a composite with excellent microwave absorption properties and mechanical properties.
Absorbing composite material with periodic ripple structure and surface thin layer resistance
In addition to the composite corrugated board designed by the advanced technology institute mentioned above, researchers also used styrene ethylene butadiene styrene (SEBS) and materials such as carbon black and graphite to prepare an absorbing composite material with periodic corrugated structure and surface thin layer resistance. Research has found that the peak reflection loss and absorption bandwidth of this structure are determined by the geometric parameters and surface layer resistance of the corrugated structure. Among them, the geometric parameter w affects the size and position of the peak; When h increases, the absorption peak will shift towards lower frequencies; When d increases while other geometric parameters remain constant, the absorption peak will shift towards lower frequencies. As the thin layer resistance increases, the absorption peak gradually becomes clear, and the maximum peak value of -41.92 dB appears at a resistance of 2200 Ω/sq.
Conclusion:
Corrugated core structure absorbing materialThe production method is similar to that of honeycomb structure, and the absorption performance can be adjusted by adjusting the geometric parameters. In addition, the combination of corrugated structure and foam core structure can further improve the wave absorption effect of materials. The composite corrugated board designed by Advanced Institute Technology and the absorbing composite material with periodic corrugated structure and surface thin layer resistance have achieved excellent absorbing and mechanical properties. These research results provide important guidance for us to deepen our understanding and application of corrugated core structure absorbing materials.
