Foaming type electromagnetic wave absorption composite material and preparation method thereof

A technology of electromagnetic wave absorption and composite materials, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as sedimentation and agglomeration, affect electromagnetic wave absorption, poor dispersion, etc., achieve good absorption function, prolong service life, and reduce oxidation Effect

Inactive Publication Date: 2010-12-01
李勇
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high density of electromagnetic loss absorbing materials, they are prone to sedimentation and agglomeration, and it is difficult to disperse them evenly in the matrix, which affects the absorption of electromagnetic waves.
The existing research results at home and abroad are mainly filled with polystyrene balls, ceramsite, perlite and electromagnetic absorbe

Method used

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Example Embodiment

[0020] The following further explains the present invention in combination with specific embodiments, which will help to further understand the present invention. The protection scope of the present invention is not limited by these embodiments, and the protection scope of the present invention is defined by the claims.

[0021] 1. Preparation of electromagnetic absorber

[0022] The composition and mass of the electromagnetic absorber are in kilograms:

[0023] Carbon black 3, amorphous alloy powder 3, silicon carbide powder 3, stone grinding powder 3, polyaniline 1, polyphenylene 1, magnetic ferrite powder 3, sendust powder 3, permalloy powder 1, hydroxyl iron Powder 1, alumina, zinc, titanium powder 0.3, carbon fiber 0.5, amorphous iron fiber 0.5, metal short fiber and magnetic beads 0.2, bentonite 0.2, titanate coupling agent 0.2, reinforcing agent 0.1.

[0024] The preparation method of electromagnetic absorber is:

[0025] The first step: dry and mix carbon black 3, amorphous all...

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Abstract

The invention discloses a foaming type electromagnetic wave absorption composite material and a preparation method thereof. The electromagnetic wave absorption composite material is prepared from 10 to 40 mass percent of an electromagnetic absorbent and 60 to 90 mass percent of a base material through a foaming process. Impedance matching between the base material and air is improved by uniform gaps formed by foaming, and a powder material with electromagnetic wave absorption function is uniformly diffused in the foaming process of the base and adsorbed on foam hole walls to form a dielectric loss and magnetic hysteresis loss electromagnetic wave absorption network, so that the electromagnetic waves entering the base are converted into heat energy and attenuated through motion such as reflection, refraction, vortex, resonance and the like. The foaming type electromagnetic wave absorption composite material is widely applied to the field of electromagnetic radiation, electromagnetic interference and electromagnetic information leakage prevention, suppression and absorption treatment.

Description

technical field [0001] The invention relates to the field of electromagnetic wave-absorbing composite materials, in particular to a foamed electromagnetic wave-absorbing composite material and a preparation method thereof. Background technique [0002] In the traditional sense, according to the structure of the absorbing material, it can be divided into coating-type absorbing materials, patch-type absorbing materials, absorbing polymers, and absorbing composite materials. According to the electromagnetic absorbing mechanism, absorbing materials are divided into magnetic loss absorbing materials, electric loss absorbing materials and double complex absorbing materials. In order to meet the requirements of low reflection, high absorption, and broadband absorption, absorbing materials are often designed as double-layer or multi-layer structures. When the impedance transformation layer formed by the electromagnetic loss type absorbing material has a lower dielectric constant, i...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08L21/00C08L3/02C08L79/02C08L49/00C08L1/02C08K13/04C04B28/00C09K3/00C04B14/48
Inventor 李勇
Owner 李勇
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