Preparation technology of centimetre wave-millimeter wave compatible absorbing material

A wave-absorbing material and preparation technology, which is applied in the field of composite material preparation, can solve the problem that centimeter wave-millimeter wave cannot be well compatible with wave-absorbing performance, and achieve the effects of light weight, wide application, and good impedance matching effect

Active Publication Date: 2014-01-29
HUNAN JINGE NEW MATERIAL
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Preparation technology of centimetre wave-millimeter wave compatible absorbing material
  • Preparation technology of centimetre wave-millimeter wave compatible absorbing material
  • Preparation technology of centimetre wave-millimeter wave compatible absorbing material

Examples

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Embodiment 1

[0030] 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.

[0031]2. Take 1g of coupling agent, dilute it with 50g o...

Embodiment 2

[0036] 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 relates to a preparation technology of a centimetre wave-millimeter wave compatible absorbing material. The material is of five-layer structure, and a substrate is an irregular surface made of any material; the topmost layer is a first layer, and mainly consists of a W-shaped hexagonal ferrite absorbing agent and an acrylic resin adhesive; a second layer is composed of a carbonyl iron powder absorbing agent and an epoxy resin adhesive, and a third layer is composed of a Fe85Si1Al6Cr8 nanometer crystal thin absorbing agent and an epoxy resin adhesive; a fourth layer is composed of a polycrystal iron fibre absorbing agent and an epoxy resin adhesive; and a fifth layer is composed of a chopped carbon fiber, a sooty mixed absorbing agent and a polyurethane adhesive. A preparation process comprises the following steps: firstly, covering and preparing a bottom fifth-layer medium coating on the substrate; and then successively covering and preparing a fourth-layer medium coating, a third-layer medium coating, a second-layer medium coating and a first-layer medium coating, wherein the coating preparation of each medium coating is as follows: uniformly stirring a coupling agent, a diluting agent and the absorbing agent of each layer, standing, then adding the adhesive of each layer, uniformly stirring to obtain a paint, coating the paint, and curing, thus obtaining the centimetre wave-millimeter wave compatible absorbing material.

Description

technical field [0001] The invention relates to a preparation process of a composite material with compatible wave-absorbing effects on centimeter waves and millimeter waves. 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) absorbin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/04B32B27/08B32B27/30B32B27/38B32B27/40B32B33/00B32B37/06B32B37/10
Inventor 邹利民邓维张晓东李卓李耀辉
Owner HUNAN JINGE NEW MATERIAL
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