Carbon fiber electromagnetic wave absorbing material and preparation method thereof

A technology of electromagnetic wave absorption and carbon fiber, which is applied in the direction of chemical instruments and methods, other chemical processes, lamination devices, etc., can solve the problems of long development cycle and limited wave absorption bandwidth, and achieve low preparation cost, wide operating frequency band, and preparation The effect of simple process route

Inactive Publication Date: 2013-06-26
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current carbon fiber absorbing materials are usually used in the traditional Dallenbach structure, and the absorbing bandwidth is limited, and the current research is mainly based on experimental methods, and the development period is long

Method used

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  • Carbon fiber electromagnetic wave absorbing material and preparation method thereof
  • Carbon fiber electromagnetic wave absorbing material and preparation method thereof
  • Carbon fiber electromagnetic wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a kind of like Figure 1 to Figure 5 The shown carbon fiber electromagnetic wave-absorbing material of the present invention is mainly composed of square prisms 1 periodically distributed on the conductive substrate 4 (metal aluminum substrate is used in this embodiment), and the regular prism is composed of Carbon fiber layers 2 and dielectric layers 3 are alternately stacked in a direction perpendicular to the plane of the conductive substrate 4 . In this embodiment, the periodic distribution of the regular square prisms 1 means that the regular square prisms 1 are arranged in a matrix. The side length b of the lower bottom of the regular square prism 1 is 8.4mm, the side length a of the upper bottom of the regular square truss is 4.5mm, and the distance d between two adjacent regular square trusses is 2.0mm. The carbon fiber layer 2 in this embodiment is made of carbon fiber-reinforced epoxy resin-based composite material, especially a resin composite material reinf...

Embodiment 2

[0033] a kind of like Figure 1 ~ Figure 3 The carbon fiber electromagnetic wave-absorbing material of the present invention shown, the carbon fiber electromagnetic wave-absorbing material is mainly composed of regular square prisms 1 periodically distributed on the conductive substrate 4, and the regular square prisms are composed of carbon fiber layers 2 and medium layers 3 in the vertical direction. They are alternately stacked in the direction of the plane of the conductive substrate 4 . In this embodiment, the periodic distribution of the regular square prisms 1 means that the regular square prisms 1 are arranged in a matrix. The side length b of the lower bottom of the regular square truss 1 is 7.0mm, the side length a of the upper bottom of the regular square truss is 3.8mm, and the distance d between two adjacent regular square trusses is 1.5mm. The carbon fiber layer 2 in this embodiment is made of carbon fiber reinforced epoxy resin matrix composite material, and th...

Embodiment 3

[0037] a kind of like Figure 1 ~ Figure 3 The carbon fiber electromagnetic wave-absorbing material of the present invention shown, the carbon fiber electromagnetic wave-absorbing material is mainly composed of regular square prisms 1 periodically distributed on the conductive substrate 4, and the regular square prisms are composed of carbon fiber layers 2 and medium layers 3 in the vertical direction. Alternately stacked in the direction of the plane of the conductive substrate 4 . In this embodiment, the periodic distribution of the regular square prisms 1 means that the regular square prisms 1 are arranged in a matrix. The side length b of the lower bottom of the regular square prism 1 is 10.0mm, the side length a of the upper bottom of the regular square truss is 4.8mm, and the distance d between two adjacent regular square trusses is 2.0mm. The carbon fiber layer 2 in this embodiment is made of carbon fiber reinforced epoxy resin matrix composite material, and the electr...

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Abstract

The invention discloses a carbon fiber electromagnetic wave absorbing material. The material mainly comprises prismoids periodically distributed on a conductive substrate, wherein the prismoids are formed by alternately superposing a carbon fiber layer and a dielectric layer in the direction vertical to the plane of the conductive substrate. A preparation method for the material comprises the following steps of: selecting reinforcing materials for preparing the carbon fiber layer and the dielectric layer, then sequentially spreading the resin adhesive dipped reinforcing materials according to the sequence of alternately superposing the carbon fiber layer and the dielectric layer, and preparing a carbon fiber layer / dielectric layer superposed board by adopting a hot pressing process of resin adhesive standards; and processing the carbon fiber layer / dielectric layer superposed board according to the required shape and size by using a standard numerical control milling method, thereby obtaining the carbon fiber electromagnetic wave absorbing material. The material has the advantages of high applicability, low cost, wide working band, simple processing process and the like.

Description

technical field [0001] The invention relates to a wave-absorbing material and a preparation method thereof, in particular to a wave-absorbing material containing carbon fiber and a preparation method thereof. Background technique [0002] The development and application technology of electromagnetic absorbing materials originated during the Second World War and has been widely used so far. Today, with the development of electronic science and technology, the application range of electromagnetic absorbing materials has gone far beyond the military field, and its application in civilian applications such as information dissemination, electromagnetic compatibility, and microwave radiation protection has become increasingly widespread. Among the many kinds of electromagnetic wave absorbing materials, carbon fiber absorbing materials are one of the most widely researched and used absorbing materials. However, the current carbon fiber absorbing materials are usually used in the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/30B32B9/04B32B15/04B32B37/02B32B37/06C09K3/00
Inventor 程海峰庞永强周永江王军
Owner NAT UNIV OF DEFENSE TECH
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