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A light-weight magnetic wave-absorbing material and its preparation method

A magnetic wave-absorbing and light-weight technology, which is applied in the fields of magnetism of inorganic materials, carbon preparation/purification, inductor/transformer/magnet manufacturing, etc. Wave performance, low cost, wide frequency effect

Active Publication Date: 2020-05-22
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high density of metal fine powder (the density of general metal fine powder is 1g / cm 3 Above), low filling rate and other reasons, the application of metal micropowder magnetic absorbing materials has received certain restrictions

Method used

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  • A light-weight magnetic wave-absorbing material and its preparation method
  • A light-weight magnetic wave-absorbing material and its preparation method
  • A light-weight magnetic wave-absorbing material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) prepare chitosan airgel: add 120ml deionized water in 3g chitosan, after mixing uniformly, add dropwise the acetic acid solution that volume percent concentration is 5%, stir 2 hours, chitosan dissolves completely, The solution was clear, and then freeze-dried at -80°C to obtain chitosan airgel;

[0042] (2) Preparation of precursor mixed solution: immerse 6.5g chitosan airgel in 800ml of 0.0375mol / L nickel nitrate solution, and leave it for 24h to obtain precursor mixed solution;

[0043] (3) Move the precursor mixture to an oven at 130° C., dry until it explodes, and collect the product after the explosion. After the explosion, a nickel / carbon airgel composite material is obtained, and the light-weight magnetic wave-absorbing material is obtained.

[0044] The density of the lightweight magnetic absorbing material prepared in Example 1 is 0.42g / cm 3 .

[0045] Depend on figure 1 It can be seen that the structural shape of the lightweight magnetic absorbing mate...

Embodiment 2

[0051] (1) prepare chitosan airgel: add 200ml deionized water in 6g chitosan, after mixing uniformly, add dropwise the acetic acid solution that volume percent concentration is 50%, stir 2 hours, chitosan dissolves completely, The solution is clear, and then freeze-dried at -60°C to obtain chitosan airgel;

[0052] (2) Preparation of precursor mixed solution: immerse 4g chitosan airgel in 500ml of 0.06mol / L nickel nitrate solution, and leave it for 12h to obtain precursor mixed solution;

[0053] (3) Move the precursor mixture to an oven at 150° C., dry until it explodes, and collect the product after the explosion. After the explosion, a nickel / carbon airgel composite material is obtained, and the light-weight magnetic wave-absorbing material is obtained.

[0054] The density of the lightweight magnetic absorbing material prepared in Example 2 is 0.55g / cm 3

[0055] A light-weight magnetic wave-absorbing material and a preparation method thereof described in the embodiments...

Embodiment 3

[0057] (1) prepare chitosan airgel: add 100ml deionized water in 3g chitosan, after mixing uniformly, add dropwise the acetic acid solution that volume percent concentration is 10%, stir 2 hours, chitosan dissolves completely, The solution becomes clear, and then freeze-dried at -70°C to obtain chitosan airgel;

[0058] (2) Preparation of precursor mixed solution: 8.5g chitosan airgel was immersed in 600ml of 0.05mol / L nickel nitrate solution, and after standing for 24h, the precursor mixed solution was obtained;

[0059] (3) Move the precursor mixture to an oven at 160° C., dry until it explodes, and collect the product after the explosion. After the explosion, a nickel / carbon airgel composite material is obtained, and the light-weight magnetic wave-absorbing material is obtained.

[0060] The density of the lightweight magnetic absorbing material prepared in Example 3 is 0.38g / cm 3

[0061] A light-weight magnetic wave-absorbing material and a preparation method thereof de...

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Abstract

The invention provides a lightweight magnetic wave-absorbing material and a preparation method thereof, and belongs to the technical field of magnetic wave-absorbing materials. The preparation methodof the lightweight magnetic wave-absorbing material comprises the following steps: (1) preparation of chitosan aerogel; (2) preparation of precursor mixed liquor: chitosan aerogel is dipped in a nickel salt solution, the materials are permitted to stand for 12-24 hours, and precursor mixed liquor is obtained; (3) the precursor mixed liquor is dried to explosion, in order to obtain the lightweightmagnetic wave-absorbing material. The invention also discloses the lightweight magnetic wave-absorbing material. The lightweight magnetic wave-absorbing material and the preparation method thereof have the advantages of simple method process, and improved conductivity, electricity storage capability, magnetic and wave absorbing performance of materials; the material has the advantages of small density, wide absorption frequency band, and good wave absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of magnetic wave-absorbing materials, and in particular relates to a lightweight magnetic wave-absorbing material and a preparation method thereof. Background technique [0002] Metal micropowder magnetic absorbing material, as a kind of magnetic absorbing material, has received extensive attention. On the one hand, with the development of communication and electronic technology, electromagnetic waves of different frequencies flood people's lives, destroying people's living environment and causing serious electromagnetic pollution; on the other hand, electromagnetic wave-absorbing materials are also one of the important stealth materials First, it can absorb radar waves, weaken the reflected waves or even not reflect radar waves, so as to achieve the purpose of stealth. [0003] At present, in addition to meeting the requirements of high absorption strength, absorbing materials also need to achieve the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01G53/04C22B5/10H01F1/01H01F41/00
CPCC01G53/04C01P2002/54C01P2002/72C01P2004/03C01P2006/10C01P2006/42C22B5/10H01F1/01H01F41/00
Inventor 张金利王莉娜于锋
Owner SHIHEZI UNIVERSITY