Carbon coated nickel nanoparticle and silicon resin composite microwave absorbing coating and preparation method thereof

A nano-particle and wave-absorbing coating technology, applied in the field of wave-absorbing materials, can solve the problem of inability to take into account strong electromagnetic wave absorption and broadband absorption, and achieve the effect of improving chemical stability, improving electromagnetic wave absorption capacity and low reflectivity

Inactive Publication Date: 2015-12-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional wave-absorbing materials that use ferrite as a filler often cannot take into account the advantages of strong electromagnetic wave absorption and broadband absorption
However, there is no literature report on the combination of the two to prepare wave-absorbing coatings.

Method used

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  • Carbon coated nickel nanoparticle and silicon resin composite microwave absorbing coating and preparation method thereof
  • Carbon coated nickel nanoparticle and silicon resin composite microwave absorbing coating and preparation method thereof
  • Carbon coated nickel nanoparticle and silicon resin composite microwave absorbing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a carbon-coated nickel nanoparticle / silicone resin composite wave-absorbing coating, comprising the steps of:

[0038] (1) Preparation of carbon-coated nickel nanoparticles:

[0039] Use arc plasma to prepare nanomaterial system, use graphite rod as cathode, mix graphite powder (micron level) and reduced nickel powder (micron level) in a weight ratio of 4:1, and pass through the metallographic sample mounting machine Press into a cylindrical anode with a diameter of 25mm and a height of 30mm, and the distance between the two electrodes is 3-5mm; the reaction chamber is evacuated to 2-3Pa, and high-purity argon is introduced to make the pressure in the chamber reach 50kPa, and the direct current is controlled. The voltage is 22V and the DC current is 150A, so that a stable arc is generated between the two poles; the anode material is consumed during the arc radiation process and converted into soot and deposited on the inner surface of the reactio...

Embodiment 2

[0045] A preparation method of a carbon-coated nickel nanoparticle / silicone resin composite wave-absorbing coating, comprising the steps of:

[0046] (1) Preparation of carbon-coated nickel nanoparticles:

[0047] Use arc plasma to prepare nanomaterial system, use graphite rod as cathode, mix graphite powder (micron level) and reduced nickel powder (micron level) in a weight ratio of 2:3, and pass through the metallographic sample mounting machine Press into a cylindrical anode with a diameter of 25mm and a height of 30mm, and the distance between the two electrodes is 3-5mm; the reaction chamber is evacuated to 2-3Pa, and high-purity argon is introduced to make the pressure in the chamber reach 45kPa, and the direct current is controlled. The voltage is 30V and the DC current is 130A, so that a stable arc is generated between the two poles; the anode material is consumed during the arc radiation process and converted into soot and deposited on the inner surface of the reactio...

Embodiment 3

[0053] A preparation method of a carbon-coated nickel nanoparticle / silicone resin composite wave-absorbing coating, comprising the steps of:

[0054] (1) Preparation of carbon-coated nickel nanoparticles:

[0055] Use arc plasma to prepare nanomaterial system, use graphite rod as cathode, mix graphite powder (micron level) and reduced nickel powder (micron level) in a weight ratio of 3:2, and pass through the metallographic sample mounting machine Press into a cylindrical anode with a diameter of 25mm and a height of 30mm, and the distance between the two electrodes is 3-5mm; the reaction chamber is evacuated to 2-3Pa, and high-purity argon is introduced to make the pressure in the chamber reach 30kPa, and the direct current is controlled. The voltage is 20V and the DC current is 120A, so that a stable arc is generated between the two poles; the anode material is consumed during the arc radiation process and converted into soot and deposited on the inner surface of the reactio...

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Abstract

The invention discloses a carbon coated nickel nanoparticle and silicon resin composite microwave absorbing coating and a preparation method thereof. The composite microwave absorbing coating is composed of 40%-60% by weight of carbon coated nickel nanoparticles and silicon resin. The preparation method comprises the steps that the carbon coated nickel nanoparticles are prepared through an arc discharge method; the carbon coated nickel nanoparticles are filled into the silicon resin to be evenly mixed, and coating slurry is obtained; an adequate amount of xylene is taken to serve as solvent to be added into the slurry, and the viscosity of the slurry is adjusted; a curing agent is added into the slurry, even stirring is conducted, and the coating with certain thickness is prepared. The composite microwave absorbing coating prepared through the method has the advantages of being wide in wave-absorbing band, good in wave-absorbing efficiency, low in reflectivity, high in stability, good in mechanical property and the like, the technology is simple, and the coating is easy to repair.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a carbon-coated nickel nanoparticle / silicone resin composite wave-absorbing coating and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, the wide application and development of electronic equipment has brought great convenience to people's life, and at the same time, the electromagnetic radiation produced by it has also had a great impact on human health and the environment on which we live. Electromagnetic wave absorbing materials are not only widely used in civilian use, but also become more and more important in the military. To improve the survivability and defense capabilities of military weapon systems, stealth technology has undoubtedly become a high-tech military technology that countries around the world focus on research and development. Nanocomposite wave-absorbing coatings can absorb elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C09D5/32
Inventor 黄颖欣张海燕曾国勋谢润丰郑利明朱炯杭
Owner GUANGDONG UNIV OF TECH
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