Cobalt-carbon composite wave-absorbing material derived from nickel-doped metal organic framework and preparation method thereof

A metal-organic framework and wave-absorbing material technology, which is applied in the direction of carbon compounds, non-metallic elements, chemical instruments and methods, etc., can solve the problems of high filling degree and narrow effective absorption frequency band, and achieve enhanced conductivity and improved impedance matching characteristics , The effect of promoting polarization loss
CN113292068AActive Publication Date: 2021-08-24HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2021-08-24

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Abstract

The invention discloses a cobalt-carbon composite wave-absorbing material derived from a nickel-doped metal organic framework and a preparation method thereof, which belong to the technical field of microwave absorbing materials. By adjusting the adding amount of nickel salt in the 2-methylimidazole cobalt and melamine compound, the magnetic metal components and content in the derived cobalt-nickel-carbon material, the graphitization degree and structural form of the carbon material and the like are effectively adjusted, optimization of electromagnetic loss is achieved, and then effective absorption frequency band broadening is achieved under the low filling degree. The introduction of the nickel nanoparticles promotes the appearance of the sheet-shaped carbon material, and the cobalt and nickel nanoparticles catalyze the growth of the short carbon nanotubes, so that both the cobalt and nickel nanoparticles are helpful for enhancing the conductivity under a low filling degree; and more surface defects and abundant interface structures also promote the enhancement of polarization loss. The effective absorption frequency band of the derived cobalt-nickel-carbon composite wave-absorbing material can reach 5.6 GHz under the conditions that the filling degree is 20 wt% and the thickness is 1.7 mm, and excellent light broadband wave-absorbing characteristics are shown. The manufacturing cost is low, and the manufacturability is good.
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Description

technical field

[0001] The invention belongs to the technical field of microwave absorbing materials, in particular to a cobalt-carbon composite wave-absorbing material derived from a nickel-doped metal-organic framework, and also relates to a preparation method for the above-mentioned cobalt-carbon composite wave-absorbing material derived from a nickel-doped metal-organic framework . Background technique

[0002] In recent years, the rapid development of electronic information technology has not only brought great convenience to human life, but also brought serious problems such as electromagnetic interference and electromagnetic radiation pollution, which may cause economic losses and personal injuries. How to weaken the adverse effects of electromagnetic radiation and interference has become an urgent problem for related industries. Absorbing materials can convert the energy of incident electromagnetic waves into heat and other forms through electromagnetic attenuation ...

Claims

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