Composite wave absorbing material and preparation method thereof

A composite wave absorbing material and mixture technology, which is applied in the field of wave absorbing materials, can solve the problems of low matching of wave absorbing substrates, limited wave absorbing performance, low wave absorbing performance, etc., and achieves good material density and uniformity. Stable and productive effect

Active Publication Date: 2018-07-06
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional absorbing materials have high density, low absorbing performance, and low matching with absorbing substrates, which limits the further improvement of absorbing performance.

Method used

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  • Composite wave absorbing material and preparation method thereof
  • Composite wave absorbing material and preparation method thereof
  • Composite wave absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Dissolve 6g of MAX phase powder in 50ml of 40wt% HF solution, stir at 60°C for 20h, wash the obtained product with deionized water 6 times until the pH of the solution is >6, centrifuge, filter, and dry , to get MXene powder, the SEM image of the prepared MXene powder is as figure 1 shown.

[0050] Get 0.42g of MXene prepared by the above process and dissolve in 20ml of ethylene glycol solution, then add 0.21gFeCl3 6H 2 O, 0.84g of anhydrous sodium acetate, stirred for 3h to obtain a uniformly mixed brown suspension, then put the suspension in a 50ml reaction kettle and heated at 200±5°C for 8h to obtain a sandwich-structured MXene / Fe 3 o 4 Composite absorbing material; the above MXene / Fe 3 o 4 The composite absorbing material is heated at 300±5°C for 1 hour, that is, annealing treatment, and the final absorbing material is obtained. The SEM image results are as follows: figure 2 shown.

[0051] From figure 2 The SEM image shows Fe 3 o 4 Nanoparticles grow ...

Embodiment 2

[0058] Dissolve 3g of MAX phase powder in 30ml of 40wt% HF solution, stir at 40°C for 18h, wash the obtained product with deionized water 6 times until the pH of the solution is >6, centrifuge, filter, and dry , to get MXene powder, the SEM image of the prepared MXene powder is as figure 1 Consistent with that shown.

[0059] Take 0.3g of MXene prepared by the above process and dissolve in 20ml of ethylene glycol solution, then add 0.105gFeCl 3 ·6H 2 O, 0.42g of anhydrous sodium acetate, stirred for 2.5h to obtain a uniformly mixed brown suspension, then put the suspension in a 50ml reaction kettle, and heated at 200±5°C for 8h to obtain a sandwich structure MXene / Fe 3 o 4 Composite absorbing material; the above MXene / Fe 3 o 4 The composite absorbing material is heated at 300±5°C for 1 hour and then annealed to obtain the final absorbing material. The SEM image results are as follows: figure 2 Consistent with that shown.

[0060] Fe can be seen from the SEM image 3 o...

Embodiment 3

[0067] Dissolve 10g of MAX phase powder in 80ml of 40wt% HF solution, stir at 80°C for 24h, wash the obtained product with deionized water 6 times until the pH of the solution is >6, centrifuge, filter, and dry , to get MXene powder, the SEM image of the prepared MXene powder is the same as figure 1 unanimous.

[0068] Take 0.6g of MXene prepared by the above process and dissolve in 20ml of ethylene glycol solution, then add 1.05gFeCl 3 ·6H 2 O, 4.2g of anhydrous sodium acetate, stirred for 3.5h to obtain a uniformly mixed brown suspension, then put the suspension in a 50ml reaction kettle, and heated at 200±5°C for 12h to obtain a sandwich structure MXene / Fe 3 o 4 Composite absorbing material; the above MXene / Fe 3 o 4 The composite absorbing material is heated at 300±5°C for 1 hour, that is, annealing treatment, and the final absorbing material is obtained. The SEM image results are as follows: figure 2 Consistent with that shown.

[0069] Fe can be seen from the SEM...

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Abstract

The invention relates to the field of wave absorbing materials, in particular to a composite wave absorbing material and a preparation method thereof. The composite wave absorbing material is characterized in that the surface of each of MXene layers is coated with a ferrite, and the different MXene layers and the ferrites on the surfaces of all the layers jointly form a sandwich structure. The composite wave absorbing material and the preparation method thereof provided by the invention have the benefits that MXene is prepared by adopting a chemical etching process, the ferrites prepared by adopting a hydrothermal preparation process are compounded with the MXene so as to grow in situ on the surface of MXene powder, the degree of integration between the ferrites and the MXene powder is high, and the coating is uniform and compact; the prepared MXene/ferrite composite wave absorbing material with the sandwich structure is light in density, high in strength, adjustable in dielectric constant and excellent in wave absorbing performance. In addition, the preparation method is simple, used equipment is simple, the process is stable, the production efficiency is high, the cost is reduced, the compactness and the uniformity of the material are good.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the increasing popularity of electronic equipment, electromagnetic interference caused by electromagnetic radiation has become the fourth largest social public hazard after water pollution, air pollution and noise pollution. Electromagnetic interference will not only affect the stability, safety and reliability of electronic work, but also seriously endanger human health. People who are exposed to the electromagnetic environment for a long time are vulnerable to damage to the nervous system and immune system, and can induce various diseases such as leukemia, miscarriage, and breast cancer. Therefore, the control of electromagnetic pollution poses a great challenge to the shielding of electromagnetic interference. Convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 徐晨赵国梁周阳
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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