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New corrosion resistant composite wave absorbing material

A composite wave-absorbing material and corrosion-resistant technology, applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as difficult to achieve thin-layer broadband absorption, large thickness, etc.

Inactive Publication Date: 2015-02-25
BEIJING GUOHAO SENSOR TECH RES INST GENERAL PARTNERSHIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wave-absorbing coating is usually composed of various forms of carbon, SiC powder, metal or metal-plated fiber as the absorber, and a dielectric polymer as the binder, and is light in weight (generally less than 4kg / m 2 ), high-frequency absorption is good, but the thickness is large, and it is difficult to achieve thin-layer broadband absorption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Specific steps: 1) Dissolve 8-10 g of polyvinyl alcohol in 100 g of water, spray the solution on the prepared mold, and dry it for use. 2) 30g of carbonyl iron powder and 30g of Co-Ni-Zn ferrite are ultrasonically treated with a mixed solution of 0.5-5ml of silane coupling agent and 10-50ml of absolute ethanol for 1-2 hours, and dried at 80°C for 12-24 hours. 3) Weigh 20-50 g of the powder treated in step 2) and add 10-20 ml of solvent, ultrasonically disperse for 30 minutes, then add 60-100 g of resin, pour the mixture into a ball mill tank, and mill for 8-12 hours. 4) Add 50-100g of curing agent to the mixed material ground in step 3), and spray it on the mold prepared in step 1). After curing, remove the composite film from the mold, put it in water, and remove the polyvinyl alcohol layer to obtain composite absorbing film sample 1. The frequency range in which the reflectance of sample 1 is less than -10dB is 3-15GHz, and the bandwidth is 12GHz.

Embodiment 2

[0027] Concrete steps: 1) Dissolve 8-10 g of polyethanol in 100 g of water, spray the solution on the prepared mold, and dry it for use. 2) Ultrasonicate 30g of carbonyl iron powder, 30g of Co-Ni-Zn ferrite and 10g of hollow carbon spheres with a mixed solution of 0.5-5ml silane coupling agent and 10-50ml of absolute ethanol for 1-2 hours, and dry at 80°C for 12-2 hours. 24 hours. 3) Weigh 20-50 g of the powder treated in step 2) and add 10-20 ml of solvent, ultrasonically disperse for 30 minutes, then add 60-100 g of resin, pour the mixture into a ball mill tank, and mill for 8-12 hours. 4) Add 50-100g of curing agent to the mixed material ground in step 3), and spray it on the mold prepared in step 1). After curing, remove the composite film from the mold, put it in water, and remove the polyvinyl alcohol layer to obtain composite absorbing film sample 2. The frequency range in which the reflectance of sample 2 is less than -10dB is 1.6-18GHz, and the bandwidth is 16.4GHz....

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Abstract

The invention discloses a novel corrosion resistant composite wave absorbing material and a preparation method thereof, and belongs to the field of electromagnetic wave absorbing materials. The wave absorbing material includes 60-100 parts of resin polymer matrix, 50-100 parts of a curing agent, 20-30 parts of ferrite, 20-30 parts of carbonyl iron powder and 5-10 parts of a hollow granular material. The preparation method is as follows: adding a magnetic filler, a conductive filler and a semi conductive filler into resin solution for evenly mixing, and adding the curing agent. The electromagnetic wave absorbing material prepared by the method has the coating thickness of less than or equal to 3mm; in the 2-18GHz, the absorption reflectivity is less than or equal to-10dB; and the electromagnetic wave absorbing material is stealth material with good corrosion resistance, strong wave absorbing performance and wide wave absorbing band.

Description

technical field [0001] The invention relates to a novel corrosion-resistant composite wave-absorbing material, in particular to a novel corrosion-resistant composite wave-absorbing material for absorbing electromagnetic waves. Background technique [0002] With the development of modern science and technology and military technology, the research and application of absorbing materials is becoming more and more important. New wave-absorbing materials are required to meet "thinness, lightness, width, and strength". New wave-absorbing materials should meet higher requirements such as multi-spectrum stealth, environmental adaptation, high temperature resistance, and corrosion resistance, so as to adapt to the increasingly harsh future battlefield. [0003] The absorbing materials described in this paper can be divided into resistive, dielectric and magnetic absorbing materials in terms of absorbing mechanism. The loss of resistive absorbing materials is related to the conductiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L63/02C08L75/04C08L61/16C08L79/04C08K7/06C08K7/14C08K7/24C08K3/04C08K3/08C08K3/22C09K3/00
Inventor 袁欣李建军冯华孙剑潘金杰韩跃余勇雷卫武
Owner BEIJING GUOHAO SENSOR TECH RES INST GENERAL PARTNERSHIP
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