Microwave Absorbing Properties of MnO2/Ni-Zn Ferrite/Graphite Structural Composite

In order to get high microwave absorbing properties, a new kind of three-layer structure composite absorption material was designed and prepared for optimal attenuation. Manganese Oxide was used as the absorbent in the matching layer. Nickel-Zinc ferrite (Ni-Zn ferrite) was used as the absorbent in the dielectric layer and Graphite was used as the absorbent in absorbing layer. The effects of different proportions of absorbents on the microwave absorbing properties were investigated. The results shows that the maximum wave absorbing peak of the 11# sample with the thickness of 5mm is -38.54dB at 14.35GHz and had a bandwidth of 7.1GHz (R<-10dB). This is very important in the design and application of absorbing material.