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Novel nano carbon wave absorbing material and preparation method thereof

A technology of nano-carbon and microwave-absorbing materials, which is applied in metal material coating technology, metal processing equipment, transportation and packaging, etc., and can solve the problem that the microwave-absorbing performance of nano-carbon materials has not been fully utilized and cannot achieve full-band microwave absorption , Affect the application of nano-carbon materials and other issues, to achieve the effect of high absorption efficiency

Pending Publication Date: 2019-01-18
贵州火焰山电器股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various nano-state carbon materials (graphite, carbon nanotubes, carbon fiber materials, graphene, etc.) that have been disclosed in many years of research have very good wave-absorbing properties, and are called carbon-based wave-absorbing materials, so , It is beyond reproach that nano-carbon materials are used as the basis of wave-absorbing materials. However, at present, a single nano-carbon material cannot achieve the effect of full-band wave absorption, which greatly affects the application of nano-carbon materials in wave-absorbing materials. As a result, the good wave-absorbing performance of nano-carbon materials has not been fully utilized

Method used

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  • Novel nano carbon wave absorbing material and preparation method thereof
  • Novel nano carbon wave absorbing material and preparation method thereof
  • Novel nano carbon wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A novel nano-carbon absorbing material prepared by the following method:

[0027] (1) material selection: select nano-carbon powder with a diameter below 10nm, a purity of 92%, and iron with a purity of 99.5%;

[0028] (2) Evaporation: ① make a vacuum evaporation box, the bottom of the evaporation box is a movable disc, which is used to place nano-carbon materials, and a heated electrode is provided near the inner wall of the evaporation box. It is to use the iron selected in step (1); ② vacuumize the evaporation box to 1 × 10 -5 mmHg, heat the electrode to 1000°C to turn the iron into iron vapor, and keep it for 30 minutes; ③ Move the chassis of the evaporation box back and forth, so that the nano-carbon material particles are evenly dispersed in the air, and fully contact with the iron vapor, so that the iron vapor can be automatically plated onto the nano-carbon particles, then stop the evaporation, and sprinkle nano-carbon material powder in a vacuum state; ④ repea...

Embodiment 2

[0030] A novel nano-carbon absorbing material prepared by the following method:

[0031] (1) material selection: select nano carbon powder with a diameter below 10nm, a purity of 90%, and iron with a purity of 99%;

[0032] (2) Evaporation: ① make a vacuum evaporation box, the bottom of the evaporation box is a movable disc, which is used to place nano-carbon materials, and a heated electrode is provided near the inner wall of the evaporation box. It is to use the iron selected in step (1); ② vacuumize the evaporation box to 1 × 10 -5mmHg, heat the electrode to an appropriate temperature, so that the iron becomes iron vapor, and keep it for 25 minutes; ③ Move the chassis of the evaporation box back and forth, so that the nano-carbon material particles are evenly dispersed in the air, and fully contact with the iron vapor, so that the iron vapor automatically Plating on the nano-carbon particles, then stop the evaporation, and sprinkle the nano-carbon material powder in the va...

Embodiment 3

[0034] A novel nano-carbon absorbing material prepared by the following method:

[0035] (1) material selection: select nano-carbon powder with a diameter below 10nm, a purity of 95%, and iron with a purity of 99.7%;

[0036] (2) Evaporation: ① make a vacuum evaporation box, the bottom of the evaporation box is a movable disc, which is used to place nano-carbon materials, and a heated electrode is provided near the inner wall of the evaporation box. Use the selected ones in step (1) for 3 times each; ② Vacuum the evaporation box to 1×10 -5 mmHg, heat the electrode to 1000°C to turn the iron into iron vapor, and keep it for 35 minutes; ③ Move the chassis of the evaporation box back and forth to make the nano-carbon material particles evenly disperse into the air, fully contact with the iron vapor, and make the iron vapor automatic plating onto the nano-carbon particles, then stop the evaporation, and sprinkle nano-carbon material powder in a vacuum state; ④ repeat the evaporat...

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Abstract

The invention relates to the field of novel materials, in particular to a novel nano carbon wave absorbing material and a preparation method thereof. The metal materials of iron, cobalt, zinc, manganese and copper with good wave absorbing performance are evenly adsorbed on a nano carbon material, a special structural form, namely, a multi-layer defect metal ball structure is formed, by means of the multi-layer defect metal ball structure, when external electromagnetic waves irradiate ball bodies, the nano carbon material firstly absorbs the electromagnetic waves, then the electromagnetic wavesare scattered in metal sheets back and forth, and the electromagnetic waves are fully converted into heat energy after multiple times of scattering. The wave absorbing range of the novel nano carbonwave absorbing material is 0.5-25 microns, electromagnetic wave full wave bands are included, the effect of wave absorbing of the electromagnetic wave full wave bands is truly achieved, the absorbingrate of the electromagnetic waves is 40-45 db, the absorbing efficiency is high, the wave absorbing type is resistance type loss, and the composite nano carbon wave absorbing material is efficient, and achieves full wave band wave absorbing.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a novel nano-carbon wave-absorbing material and a preparation method thereof. Background technique [0002] Absorbing material is a functional material that can absorb electromagnetic waves and convert them into heat energy. So far, there have been many kinds of wave-absorbing materials in the world, including metal-based, non-metal-based, and composite-based. It is usually difficult to find a single dielectric material that can satisfy both impedance matching and strong absorption in a wide frequency range, and most of them can only absorb waves in their corresponding bands. Therefore, it is of great value to find a material with a relatively simple structure and strong wave-absorbing ability. [0003] Carbon is the main group element of the second period IV in the periodic table of elements, and its outermost electronic structure is 2S 2 2P 2 , so its ability to gain and lose e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C14/14C23C14/24
CPCC23C14/14C23C14/223C23C14/24B22F1/17
Inventor 吴翔邓正刚
Owner 贵州火焰山电器股份有限公司