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Centimeter wave-millimeter wave compatible absorbing composite material

A composite material and millimeter-wave technology, applied in radiation-absorbing coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problem that centimeter-millimeter waves cannot be well compatible with wave-absorbing performance, and achieve good impedance Matching Effects, Reflection Reduction Effects

Active Publication Date: 2012-06-20
HUNAN JINGE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the performance problem that centimeter wave-millimeter wave cannot be well compatible with absorbing waves in the current existing field, the purpose of the present invention is to provide a composite absorbing material that is compatible with lossy absorption of centimeter wave-millimeter wave band electromagnetic waves

Method used

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  • Centimeter wave-millimeter wave compatible absorbing composite material
  • Centimeter wave-millimeter wave compatible absorbing composite material
  • Centimeter wave-millimeter wave compatible absorbing composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Take 1g of coupling agent, dilute it with 50g of diluent mixed with xylene and n-butanol with a volume ratio of 7:3, and add a coupling agent with a diameter of 2 to 5 microns and an aspect ratio of 6:1 to 10:1. Mix chopped carbon fiber and carbon black with a particle size of 1 to 3 microns in a mass ratio of 1:8 to 1:5 to form a composite absorbent 45g into it, and stir the mixture with an electric mixer for half an hour; after standing for half an hour, then Add 55g of polyurethane adhesive to the mixture, stir to form a uniform coating; apply the coating on the substrate by air spraying or brushing, the thickness is controlled at 0.5-0.6mm, and then put it in a constant temperature drying room at 30°C for 1 hour, Then raise the temperature of the drying room to 60° C. for 1 hour to cure, or place it at room temperature for 12 hours to cure naturally, so as to prepare the fifth layer of dielectric coating.

[0030] 2. Take 1g of coupling agent, dilute it with 50g ...

Embodiment 2

[0035] Step is the same as embodiment 1, wherein in the first layer BaCo 0.9 Zn 1.1 Fe 16 o 27 60g of W-type hexagonal ferrite, 40g of acrylic resin adhesive; the raw materials of the second layer of dielectric coating include: adding 70g of spherical carbonyl iron powder with a particle size of 3 to 5 microns, and 30g of epoxy resin adhesive; the third layer Raw materials for dielectric coating include: Fe 85 Si 1 Al 6 Cr 8 75g of nanosheet-shaped absorbent, 25g of epoxy resin adhesive; the raw materials of the fourth layer of dielectric coating include adding 20g of polycrystalline iron fiber absorbent with a diameter of 3 to 6 microns and an aspect ratio of 15:1 to 20:1 , 80g of epoxy resin adhesive; the raw materials of the fifth layer of dielectric coating include adding short-cut carbon fibers with a diameter of 2 to 5 microns and an aspect ratio of 6:1 to 10:1 and carbon black with a particle size of 1 to 3 microns. The mass ratio is 1:8 to 1:5 to form a composit...

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Abstract

The invention discloses a centimeter wave-millimeter wave compatible absorbing composite material. The material has a five-layer structure including a substrate which is an irregular surface made of a random material, a topmost first layer which is composed of a W-shaped hexagonal ferrite absorbent and a acrylic resin adhesive, a second layer which is composed of a carbonyl iron powder absorbent and an epoxy resin adhesive, a third layer which is composed of an Fe85Si1Al6Cr8 nanocrystalline sheet-like absorbent and an epoxy resin adhesive, a fourth layer which is composed of a polycrystallineiron fiber absorbent and an epoxy resin adhesive, and a fifth layer which is composed of a short carbon fiber / carbon black mixed absorbent and a polyurethane adhesive. The material can well solve theproblem of poor centimeter wave-millimeter wave compatible absorbing performance in the prior art, and is a composite wave-absorbing material compatible with electromagnetic waves of centimeter wave-millimeter wave bands.

Description

technical field [0001] The invention relates to a composite material with compatible wave-absorbing effect on centimeter wave and millimeter wave. Background technique [0002] Absorbing materials can convert electromagnetic wave energy into other forms of energy and be attenuated by loss. Due to the rapid development of electronic and telecommunications technology, the electromagnetic wave frequency band is expanding to higher frequency bands. The electromagnetic interference and electromagnetic pollution problems caused by ultra-wide frequency band electromagnetic wave radiation have attracted increasing attention and attention. A multi-band compatible civilian wave-absorbing material is urgently sought. [0003] At present, the existing centimeter-wave (2-18GHz) absorbing materials have good absorbing performance in the centimeter-wave band, but their millimeter-wave absorbing performance is very low, while millimeter-wave (26.6-40GHz) absorbing materials have good absorb...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D163/00C09D175/04C09D5/32
Inventor 邹利民邓维张晓东李卓李耀辉
Owner HUNAN JINGE NEW MATERIAL
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