Wave-absorbing material for silicon carbide fibre reinforced resin base sandwich structure and preparation method thereof

A silicon carbide fiber, reinforced resin-based technology, applied in the field of structural wave absorbing materials, can solve the problems of difficulty in ensuring the stability of wave absorbing properties, deterioration of mechanical properties of composite materials, and difficulty in achieving broadband absorption, etc., and achieves good absorption of electromagnetic waves and good matching. Features, the effect of excellent radar absorbing function

Active Publication Date: 2011-10-19
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the Salisbury screen absorber has a narrow absorption frequency band; the Dallenbach absorber is limited by the dispersion effect of the electromagnetic parameters of the current material, and it is difficult to achieve broadband absorption; the Jaumann absorber has a simple design and a wide absorption frequency band, but its main defect is the large thickness of the material; multi-layer Matching absorbing materials has a wide absorption frequency band, but the design is difficult, and it is difficult to prepare materials with different dielectric properties
It can be seen that there are certain deficiencies in the existing absorbing materials.
In addition, from the current research status of structural absorbing materials, the more commonly used method is to add radar absorbers to composite materials to achieve their absorbing properties. The addition of absorbers will lead to adverse effects such as deterioration of mechanical properties of composite materials and increase in density. , and the stability of the material's absorbing performance is difficult to guarantee

Method used

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  • Wave-absorbing material for silicon carbide fibre reinforced resin base sandwich structure and preparation method thereof
  • Wave-absorbing material for silicon carbide fibre reinforced resin base sandwich structure and preparation method thereof
  • Wave-absorbing material for silicon carbide fibre reinforced resin base sandwich structure and preparation method thereof

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Embodiment 1

[0023] Such as figure 1 As shown, a silicon carbide fiber-reinforced resin-based sandwich structure absorbing material of the present invention is a multi-functional laminated structure including a first dielectric layer 1, an absorbing layer 2, a second dielectric layer 3 and a reflective layer 4 , each functional layer is composed of continuous silicon carbide fiber-reinforced resin-based composite materials, and the continuous silicon carbide fibers serving as reinforcing materials in each functional layer have different resistivities. In this embodiment, the superimposed structure of the absorbing material of the silicon carbide fiber reinforced resin-based sandwich structure is the first dielectric layer 1, the absorbing layer 2, the second dielectric layer 3 and the reflective layer 4 from the outside to the inside, and the first dielectric layer 1 and the resistivity of the continuous silicon carbide fibers in the second dielectric layer 2 are much greater than the resi...

Embodiment 2

[0035] Such as figure 1 As shown, another silicon carbide fiber-reinforced resin-based sandwich structure absorbing material of the present invention is a multi-functional layer stacking type comprising a first dielectric layer 1, an absorbing layer 2, a second dielectric layer 3 and a reflective layer 4 Structure, each functional layer is composed of continuous silicon carbide fiber-reinforced resin-based composite material, and the continuous silicon carbide fibers serving as reinforcing materials in each functional layer have different resistivities. The superimposed structure of the absorbing material of the silicon carbide fiber-reinforced resin-based sandwich structure is the first dielectric layer 1, the absorbing layer 2, the second dielectric layer 3 and the reflective layer 4 in sequence from the outside to the inside, the first dielectric layer 1 and the second dielectric layer The resistivity of the continuous silicon carbide fibers in the second dielectric layer 2...

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Abstract

The invention discloses a wave-absorbing material for a silicon carbide fibre reinforced resin base sandwich structure and a preparation method thereof. The wave-absorbing material has a multi-functional layer laminated structure. The structure comprises a first medium layer, an absorbing layer, a second medium layer and a reflection layer; all the functional layers consist of a continuous silicon carbide fibre reinforced resin base composite material; and the continuous silicon carbide fibres serving as the reinforcing materials in each functional layer have different specific resistances. The preparation method for the wave-absorbing material comprises the steps as follows: the continuous silicon carbide fibres are selected firstly and woven into plain cloth; and then the resin is used as a basal body and the wave-absorbing material is manufactured by adopting a resin base composite material forming technique according to the laminated sequence and thickness of each functional layer. The wave-absorbing material has the advantages of simple structure, good parameter tolerance level, easy forming, excellent wave-absorbing functions, etc.

Description

technical field [0001] The invention mainly relates to the field of structural wave-absorbing materials, in particular to a resin-based sandwich structure wave-absorbing material and a preparation method thereof. Background technique [0002] At present, more mature absorbing material structures include Salisbury screen, Dallenbach screen, Jaumman absorber, multi-layer matching structure, etc. Among them, the Salisbury screen absorber has a narrow absorption frequency band; the Dallenbach absorber is limited by the dispersion effect of the electromagnetic parameters of the current material, and it is difficult to achieve broadband absorption; the Jaumann absorber has a simple design and a wide absorption frequency band, but its main defect is the large thickness of the material; multi-layer The matching absorbing material has a wide absorption frequency band, but it is difficult to design, and it is difficult to prepare materials with different dielectric properties. It can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/04
Inventor 程海峰刘海韬周永江王军
Owner NAT UNIV OF DEFENSE TECH
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