A kind of intelligent wave absorbing material and preparation method thereof

Abstract

The invention discloses an intelligent absorbing material and preparation method thereof. The intelligent absorbing material successively includes a high-frequency absorbing layer, a low-frequency absorbing layer, and a substrate layer from the top to the bottom. The high-frequency absorbing layer is the absorbing material for absorbing in the 2 GHz-18GHz frequency range and includes a surface-layer high-frequency absorbing material and a middle-layer high-frequency absorbing material embedded in the surface-layer high-frequency absorbing material, and carbonyl iron particles are adopted as the additive of the high-frequency absorbing layer. The low-frequency absorbing layer is the absorbing material for absorbing in the 1 GHz-2GHz frequency range, and adopts FeSi particles as the addictive. The substrate layer includes a metal substrate and a driving electromagnet embedded in the metal substrate. The invention further discloses a preparation method of the intelligent absorbing material. The preparation method is high in moulding efficiency and low in cost. The absorbing material prepared by the invention has a good electromagnetic wave absorption or shielding effect, and also has good anti-oxidation and corrosion resistance properties, and is a complex absorbing material product with application prospect.

Description

technical field [0001] The invention relates to a wave-absorbing material and a preparation method thereof, in particular to an intelligent complex structure wave-absorbing material and a preparation method thereof. Background technique [0002] With the development of electromagnetic material technology and the wide application of communication products, the application of absorbing materials provides an effective way to solve the problems of electromagnetic radiation, electromagnetic scattering and electromagnetic compatibility. The absorbing materials mainly include structural type and coating type. Among them, the coating type absorbing material is mainly prepared by spraying, which is usually thin in thickness, simple in structure, requires high manufacturing precision, and difficult to design the internal structure. The lower wave-absorbing bandwidth and wave-absorbing value are limited; the traditional preparation methods of structural wave-absorbing materials are mai...

AI Technical Summary

Problems solved by technology

The dielectric constant and permeability of tunable absorbing materials determine its resonant frequency point and energy absorption rate, that is, the resonant frequency point and energy absorption rate of tunable absorbing materials can be tuned by applying an external magnetic field or external stress, The wave-absorbing particles used in this wave-absorbing material are coated fibers, and there is still a lot of room for improvement in magnetic performance, but in order to achieve a better wave-absorbing effect, the thickness of the material is relatively large, and it has not been mentioned in detail in the manufacturing and installation

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