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Three-layer composite wave-absorbing film and preparation method thereof

A layer composite and thin film technology, which is applied in the field of three-layer composite absorbing film and its preparation, can solve the problems of high cost, complex equipment, and difficult scale

Inactive Publication Date: 2011-09-14
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Judging from the current research results on multilayer films, the main ways to realize thin films are coating (electroless plating, electroplating) and magnetron sputtering. Most of the films obtained by these two methods are inflexible, and the equipment is complicated and expensive. Difficult to scale

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  • Three-layer composite wave-absorbing film and preparation method thereof
  • Three-layer composite wave-absorbing film and preparation method thereof
  • Three-layer composite wave-absorbing film and preparation method thereof

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Embodiment Construction

[0028] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0029] See attached figure 1 As shown, the three-layer composite absorbing film of the present invention is an impedance matching layer 1 composed of a dielectric material and an organic carrier, an absorbing layer 2 composed of magnetic particles and an organic carrier, and a carbon material with better conductivity and an organic carrier. The reflective layer 3 is composed of a carrier, the thickness of the impedance matching layer 1 is 0.1-0.3mm, the thickness of the absorbing layer 2 is 0.2-0.4mm, and the thickness of the reflective layer 3 is 0.1-0.3mm.

[0030] Table 1 is an embodiment of the material selection and thickness of the three-layer composite wave-absorbing film

[0031]

[0032]

[0033] Introduce the preparation method of three-layer composite wave-absorbing film of the present invention below with e...

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Abstract

The invention discloses a three-layer composite wave-absorbing film and a preparation method thereof. The three-layer composite wave-absorbing film consists of an impedance matching layer, an absorption layer and a reflection layer, wherein the impedance matching layer consists of a dielectric material and an organic carrier; the absorption layer consists of magnetic particles and the organic carrier; the reflection layer consists of a carbon material with better electro-conductivity and the organic carrier; the thickness of the impedance matching layer is 0.1 to 0.3 millimetre (mm); the thickness of the absorption layer is 0.2 to 0.4 mm; and the thickness of the reflection layer is 0.1 to 0.3 mm. The preparation method of the three-layer composite wave-absorbing film comprises the following steps of: firstly, processing organic particles; secondly, uniformly dispersing the organic particles in an organic phase in a certain mode, and spreading to form a film; and finally, after a solvent of a first layer is completely volatilized, spreading a second layer and a third layer to form the three-layer composite wave-absorbing film. The three-layer composite wave-absorbing film has the advantages of high efficiency, light weight and low thickness, can be applied to electromagnetic shielding materials, and has a wide application prospect in ultra-thin radar wave-absorbing materials.

Description

technical field [0001] The invention relates to a three-layer composite wave-absorbing film and a preparation method thereof, belonging to the technical field of electromagnetic absorption and protection. Background technique [0002] The widespread use of wireless communication equipment and the rapid development of electronic information technology have brought great convenience to people, but also caused more and more serious electromagnetic pollution, resulting in high-frequency electromagnetic absorbing materials that have attracted widespread attention. In addition, stealth technology for radar and infrared detection technology is one of the important supports for military operations. Judging from the current research results, the designed thin film material has a very excellent electromagnetic wave absorption effect at high frequencies, and its electromagnetic wave absorption mechanism is natural resonance. In order to realize the absorption of microwaves in a wide f...

Claims

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Application Information

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IPC IPC(8): B32B5/30B32B33/00
Inventor 王晓红李雪爱韩喜江杜耘辰刘阳
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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