An aqueous solution-based broadband wave-absorbing metamaterial and its preparation method

An aqueous solution and metamaterial technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as difficult to meet engineering application requirements, high density of magnetic materials, complex preparation process, etc., to achieve easy scale production and application, raw materials Easy and mature preparation process

Inactive Publication Date: 2018-11-16
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high density of magnetic materials makes it difficult to meet the requirements of some engineering applications
At the same time, since magnetic materials are usually prepared by a specific process, the cost is high
In addition, broadband absorbing metamaterials can also be obtained through multi-layer structures, but the preparation process is complicated and the bandwidth is still relatively narrow

Method used

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  • An aqueous solution-based broadband wave-absorbing metamaterial and its preparation method
  • An aqueous solution-based broadband wave-absorbing metamaterial and its preparation method
  • An aqueous solution-based broadband wave-absorbing metamaterial and its preparation method

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Embodiment 1

[0032] Combine Figure 1-Figure 5 As shown, Embodiment 1 of the present invention provides an aqueous solution-based broadband microwave absorbing metamaterial, which includes a conductive reflective layer 3, a dielectric base layer, and a periodic array layer 4 stacked from bottom to top. The dielectric base layer is composed of a composite material frame 1 and The composite frame 1 is composed of deionized water 2 injected, the thickness d1 of the composite frame 1 is 2.5mm, the injection depth d2 of the deionized water 2 is 1.0mm, and the deionized water 2 is in contact with the upper surface of the conductive reflective layer 3. A periodic array layer 4 is provided on the top surface of the composite material frame 1, and the periodic array layer 4 is composed of an array of metal patches.

[0033] Specifically, the conductive reflective layer 3 is made of aluminum plate, the composite frame 1 is made of glass fiber reinforced epoxy resin composite material, the dielectric co...

Embodiment 2

[0042] Embodiment 2 of the present invention provides an aqueous solution-based broadband microwave absorbing metamaterial, which includes a conductive reflective layer 3, a dielectric matrix layer, and a periodic array layer 4 stacked sequentially from bottom to top. The dielectric matrix layer is composed of a composite material frame 1 and a composite material frame. 1, the thickness d1 of the composite material frame 1 is 2.8mm, the injection depth d2 of the deionized water 2 is 1.2mm, and the deionized water 2 is in contact with the upper surface of the conductive reflective layer 3. The composite material A periodic array layer 4 is provided on the top surface of the frame 1, and the periodic array layer 4 is composed of an array of metal patches.

[0043] Specifically, the conductive reflective layer 3 is made of carbon fiber composite material, the composite frame 1 is made of quartz fiber reinforced polyimide composite material, the dielectric constant of the quartz fiber...

Embodiment 3

[0051] Embodiment 3 of the present invention provides an aqueous solution-based broadband wave-absorbing metamaterial, which includes a conductive reflective layer 3, a dielectric matrix layer, and a periodic array layer 4 stacked from bottom to top. The dielectric matrix layer is composed of a composite material frame 1 and a composite material frame. 1 is composed of deionized water 2 injected in the composite material frame 1, the thickness d1 of the composite material frame 1 is 0.8mm, the injection depth d2 of the deionized water 2 is 0.5mm, the deionized water 2 is in contact with the upper surface of the conductive reflective layer 3, and the composite material A periodic array layer 4 is provided on the top surface of the frame 1, and the periodic array layer 4 is composed of an array of metal patches.

[0052] Specifically, the conductive reflective layer 3 is made of aluminum plate, the composite frame 1 is made of alumina fiber reinforced composite material, the dielect...

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Abstract

The invention discloses a water-solution-based broadband wave-absorbing metamaterial and relates to the technical field of electromagnetic functional materials. The water-solution-based broadband wave-absorbing metamaterial comprises an electrically-conductive reflecting layer, a dielectric matrix layer and a periodic array layer which are laminated sequentially from bottom to top, the dielectric matrix layer is composed of a composite frame and deionized water injected into the composite frame, the thickness of the composite frame is 0.8-3.5 mm, injection depth of the deionized water is 0.5-1.5 mm, the deionized water contacts with the upper surface of the electrically-conductive reflecting layer, and the periodic array layer is arranged on the top surface of the composite frame and is formed through arrayed arrangement of metal patches. The water-solution-based broadband wave-absorbing metamaterial has the advantages that with the aid of frequency dispersion characteristics of a water solution in a microwave frequency band, the metamaterial is capable of remarkably widening a wave-absorbing bandwidth without being thickened, and is simpler in structure, mature in preparation technology, easily available to raw materials, low in cost and easy for large-scale production and application.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic functional materials, and more specifically to an aqueous solution-based broadband wave-absorbing metamaterial and a preparation method thereof. Background technique [0002] The broadband performance of electromagnetic absorbing materials has always been one of the research focuses in related fields. The dispersion characteristics of electromagnetic parameters of materials are the key factors affecting the absorption bandwidth. Unfortunately, it is currently difficult to find a material system that fully meets the dispersion requirements in nature. Therefore, the multilayer structure is currently a common method to achieve broadband absorbing materials. However, the multi-layer structure often leads to a larger thickness, which largely limits its application in engineering. [0003] Electromagnetic metamaterials are composite structures composed of artificial sub-wavelength structural units, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 庞永强屈绍波王军李勇峰王甲富陈红雅闫明宝杜洪亮马华
Owner AIR FORCE UNIV PLA
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