A multi-layer radar absorbing coating

Abstract

The invention provides a multi-layer radar wave-absorbing coating and a preparation method thereof. The wave-absorbing coating comprises alternately laminated dielectric loss composite coating layers and magnetic loss composite coating layers; the dielectric loss coating mainly includes tetrapod-shaped zinc oxide Whiskers, conductive carbon black; magnetic loss composite coating mainly includes ferric oxide and nano-iron powder; it is applied to aluminum flat materials by spraying or brushing, and the spraying sequence from the bottom layer to the surface layer is: magnetic layer-dielectric Layer-magnetic layer-dielectric layer..., the coating is cured at constant temperature to obtain a wave-absorbing coating. The total thickness of the coating is 1.5±0.1mm, and the thickness of each layer is evenly distributed. The reflectance of the radar wave absorbing stealth paint in the 4-8GHz band reaches -4-6dB, and the reflectivity in the 8-18GHz band reaches -5--8dB. The surface density of the coating is about 1.6±0.2kg/m2, the adhesion reaches more than 13.5MPa, the impact strength reaches 50kg.cm, and it has good temperature resistance and environmental stability.

Description

A multi-layer radar absorbing coating technical field The invention relates to a wave-absorbing stealth material (RAM), in particular to a multi-layer radar wave-absorbing coating and a preparation method thereof. Background technique The development and application of stealth materials are considered to be a major breakthrough in the field of military high-tech. Modern stealth technology mainly includes the design and application of stealth structures and stealth materials. Advanced stealth materials play a pivotal role in the engineering application of stealth targets. They can be used not only to suppress specular waves, but also to suppress traveling waves, creeping waves, and edge-launched echoes. The radar wave absorption performance of materials is an important and key indicator of stealth materials and stealth technology; radar wave absorption performance refers to the ability of materials to attenuate the target echo intensity through the interaction with radar wa...

AI Technical Summary

Problems solved by technology

From the perspective of practical application, there are also two problems: one is that the dispersion process of powdered nanomaterials has not been solved, and the other is that the stability and absorbing effect have not yet been accepted.

But its material thickness is more than 3.5mm

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