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A nickel-containing composite wave-absorbing material and its preparation method

A composite wave-absorbing material and material liquid technology, which is applied in the field of nickel-containing composite wave-absorbing materials and its preparation, can solve the problems of limiting the application of graphene wave-absorbing materials and narrow graphene absorption frequency bandwidth

Active Publication Date: 2019-07-16
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high dielectric constant also leads to the problem of narrow absorption band width of graphene, which limits the application of graphene absorbing materials.

Method used

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  • A nickel-containing composite wave-absorbing material and its preparation method
  • A nickel-containing composite wave-absorbing material and its preparation method
  • A nickel-containing composite wave-absorbing material and its preparation method

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preparation example Construction

[0038] The present invention also provides a preparation method of the composite wave-absorbing material described in the above technical solution, comprising the following steps:

[0039] (1) Ferric chloride, nano-nickel powder, surfactant, urea and ethylene glycol are mixed to obtain a mixed material liquid;

[0040] (2) mixing the mixed feed liquid obtained in the step (1) with graphene oxide, and carrying out hydrothermal reaction to obtain a hydrothermal reaction feed liquid;

[0041] (3) removing the supernatant of the hydrothermal reaction feed liquid obtained in the step (2), and performing centrifugal washing and drying on the remaining feed liquid in sequence to obtain a composite wave-absorbing material.

[0042] The invention mixes ferric chloride, nano-nickel powder, surfactant, urea and ethylene glycol to obtain a mixed material liquid. In the present invention, the particle size of the nano-nickel powder is consistent with the particle size of the nano-nickel i...

Embodiment 1

[0062] According to the mass ratio of 1:3:2:110:18, weigh graphite powder, potassium permanganate, sodium nitrate, concentrated sulfuric acid and orthophosphoric acid, wherein the mass of concentrated sulfuric acid is crushed to 98%, and the mass concentration of orthophosphoric acid is 1.685g / mL; then after ultrasonically mixing graphite powder, potassium permanganate, sodium nitrate, concentrated sulfuric acid and orthophosphoric acid, the mixture was added to a polytetrafluoroethylene-lined autoclave, and kept at 50°C for 12 hours . After the obtained product was cooled, hydrogen peroxide (the mass fraction of hydrogen peroxide was 30%) was slowly added to it at a rate of 10 mL / min according to the mass ratio of the original graphite powder and hydrogen peroxide at 1:2, and the liquid turned bright yellow. The reacted mixed liquid is washed by distilled water for several times by centrifugation, and the supernatant is discarded after each washing, and then the remaining li...

Embodiment 2

[0069] According to the mass ratio of 1:2:1:90:10, weigh graphite powder, potassium permanganate, sodium nitrate, concentrated sulfuric acid and orthophosphoric acid, wherein the mass of concentrated sulfuric acid is crushed to 98%, and the mass concentration of orthophosphoric acid is 1.685g / mL; then after ultrasonically mixing graphite powder, potassium permanganate, sodium nitrate, concentrated sulfuric acid and orthophosphoric acid, the mixture was added to a polytetrafluoroethylene-lined autoclave, and kept at 60°C for 12 hours . After the obtained product was cooled, hydrogen peroxide (the mass fraction of hydrogen peroxide was 30%) was slowly added to it at a rate of 10 mL / min according to the mass ratio of the original graphite powder and hydrogen peroxide at 1:2, and the liquid turned bright yellow. The reacted mixed liquid is washed by distilled water for several times by centrifugation, and the supernatant is discarded after each washing, and then the remaining liq...

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Abstract

The invention provides a nickel-containing composite absorbing material and a preparation method thereof. The composite absorbing material comprises graphene oxide substrate, ferrite, nano nickel andnickelous carbonate; the ferrite, the nano nickel and the nickelous carbonate are loaded on the surface of the graphene oxide substrate. The result of the embodiment reveals that when the matching thickness of the composite absorbing material is 2.25 mm, -15.16 dB is absorbed to the maximum when the frequency reaches 14.88 GHz, the effective absorbing frequency band reaches 4 GHz when the reflection loss is lower than -10 dB, the absorbing frequency band is significantly broadened, and the absorbing capability is enhanced.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a nickel-containing composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of weapon system search and tracking capabilities, stealth technology has been paid more and more attention by the military of various countries. In order to meet the needs of modern warfare, stealth technology, as an emerging combat force, has been applied to weapons and equipment. As the core part of stealth technology, radar stealth technology can reduce the radar wave scattering cross section. The key technology of radar stealth technology lies in the wave-absorbing properties of absorbing materials. The preparation of new and efficient absorbing materials with good performance has become an important research in the field of national defense and military affairs. topic. [0003] Graphene is light in weight, good i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00
CPCC09K3/00
Inventor 魏世丞王玉江黄玉炜梁义王博郭蕾黄威徐滨士
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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