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Porous nickel-carbon nano-composite microsphere electromagnetic wave absorbing material and preparation method and application thereof

A technology of carbon nanocomposite and absorbing materials, which is applied in the field of porous nickel-carbon nanocomposite microsphere electromagnetic wave absorbing materials and its preparation and application, can solve the problem of difficult to meet the requirements of high-performance electromagnetic wave absorbing materials, large-scale industrial production, complex Problems such as the preparation process, to achieve the effect of good electromagnetic wave absorption performance, high saturation magnetic susceptibility, and simple preparation process

Active Publication Date: 2016-03-30
SHANDONG UNIV
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Problems solved by technology

However, affected by the particle size, shape and uniformity of metal magnets, it is difficult to meet the requirements of high-performance electromagnetic wave absorbing materials; in addition, its complicated preparation process and high production cost are also difficult to meet the needs of large-scale industrial production

Method used

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  • Porous nickel-carbon nano-composite microsphere electromagnetic wave absorbing material and preparation method and application thereof
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  • Porous nickel-carbon nano-composite microsphere electromagnetic wave absorbing material and preparation method and application thereof

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Embodiment Construction

[0009] Technical scheme of the present invention is as follows:

[0010] A porous nickel-carbon nanocomposite microsphere electromagnetic wave absorption material is a multiphase nanocomposite powder composed of carbon and nickel; wherein, nanoscale carbon is wrapped on the outside of nanoscale and / or submicron nickel particles to form a diameter of 10-300nm carbon-coated nickel particles, and vesicular nano-scale sheet carbon distributed between the carbon-coated nickel particles to form monodisperse microspheres with a diameter of 1.2-3.0 microns in a porous structure.

[0011] According to the present invention, preferably, the porous nickel-carbon nanocomposite microspheres have a pore diameter of 1-100 nm.

[0012] The porous structure of the porous nickel-carbon nanocomposite microspheres of the present invention is formed between carbon-coated nickel particles, between nanoscale flake carbon and carbon-coated nickel particles, and in the coated carbon layer, nano-carbon...

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Abstract

The invention relates to a porous nickel-carbon nano-composite microsphere electromagnetic wave absorbing material and a preparation method and application thereof. A porous nickel-carbon nano-composite microsphere is a multiphase nano-composite powder body composed of carbon and nickel and a porous-structure monodisperse microsphere with the diameter being 1.2-3.0 microns. The preparing method comprises the steps that nickel acetate, other precursors, polyvinyl alcohol and other surfactant are dissolved in an alcohol solvent and react, and nickelous hydroxide is obtained; after being processed through dehydroxylation, the nickelous hydroxide is mixed with pyrrole, pyridine or acrylonitrile, and then the mixture is directly synthesized into the porous nickel-carbon nano-composite microsphere in a sealed reaction kettle under the condition of 500 DEG C-600 DEG C. The obtained porous nickel-carbon nano-composite microsphere is good in stability and uniformity, has the characteristics of being good in electromagnetic wave absorbility, wide in absorbing and covering frequency range, high in corrosion resistance and oxidation resistance and low in cost and is used for manufacturing electromagnetic absorbers.

Description

technical field [0001] The invention relates to a porous nickel-carbon nanocomposite microsphere electromagnetic wave absorbing material and its preparation method and application, belonging to the technical field of electromagnetic wave absorbing materials. Background technique [0002] Magnetic loss, dielectric loss and conductive loss materials can all be used as electromagnetic wave absorbers, and magnetic loss materials have become a hot research topic because thinner electromagnetic wave absorbers can be prepared from them. For magnetic electromagnetic wave absorbing materials, the permeability and permittivity of the material determine its absorption performance. As a traditional magnetic electromagnetic wave absorbing material, ferrite has strong magnetism and low conductivity, and has been widely studied and paid attention to. But due to the Snoek limitation of the material itself, ferrite is suitable for the sub-GHz frequency range. In the GHz range of high frequ...

Claims

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Application Information

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IPC IPC(8): B22F1/02B22F9/24
CPCB22F9/24B22F1/16
Inventor 刘久荣刘伟邱松刘玉珍吴楠楠
Owner SHANDONG UNIV
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