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Low-frequency wave-absorbing iron-based magnetic foam wave-absorbing material and preparation method thereof

A technology of magnetic foam and wave absorbing material, applied in the field of wave absorbing material, can solve the problems of affecting the effect of wave absorbing material, uneven material distribution, poor high temperature characteristics, etc. Effect

Active Publication Date: 2022-02-11
江西伟普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-based absorbing material is a traditional magnetic absorbing material, which has the characteristics of high absorbing strength, small size, good absorbing effect, and low cost, but it has defects such as high density and poor high-temperature characteristics, which make it difficult to manufacture It is easy to precipitate and stratify during the process, causing problems such as uneven material distribution and processing difficulties, thus affecting the effect of absorbing materials

Method used

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  • Low-frequency wave-absorbing iron-based magnetic foam wave-absorbing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] An iron-based magnetic foam absorbing material for low-frequency wave absorption, in parts by weight, the iron-based magnetic foam absorbing material includes the following raw material components: 50 parts of carbonyl iron powder; 15 parts of resin; 10 parts of silicon airgel fat 10 parts of alcohol polyoxyethylene ether; 80 parts of ethanol; wherein, the resin is a mixture of polyurethane resin and epoxy resin with a mass ratio of 2:1.

[0032] Its preparation method specifically comprises the following steps:

[0033] S1. Weigh each raw material according to the proportion, and set aside;

[0034] S2. dissolving the resin in an organic solvent, and fully stirring to obtain a resin liquid;

[0035] S3. Add the iron-based magnetic powder and dispersant to the resin solution of S2, stir evenly, and then continue to mix with ultrasonic waves for 2 hours to obtain the rubber compound;

[0036] S4. Add half of the airgel to the rubber compound of S3, using an air volume ...

Embodiment 2

[0040] An iron-based magnetic foam absorbing material for low-frequency absorbing, in parts by weight, the iron-based magnetic foam absorbing material includes the following raw material components: 50 parts of carbonyl iron powder; 15 parts of resin; 10 parts of silicon airgel; 10 parts of fatty alcohol polyoxyethylene ether; 80 parts of ethanol; wherein, the resin is a mixture of polyurethane resin and epoxy resin with a mass ratio of 2:1.

[0041] Its preparation method specifically comprises the following steps:

[0042] S1. Weigh each raw material according to the proportion, and set aside;

[0043] S2. dissolving the resin in an organic solvent, and fully stirring to obtain a resin liquid;

[0044] S3. Add the iron-based magnetic powder into the acid solution and soak for 1 hour, stir 3 times during the period, then rinse 3 times with water, dry it and add it to the resin solution of S2, add a dispersant at the same time, stir evenly, and then use ultrasonic waves to cont...

Embodiment 3

[0049] An iron-based magnetic foam absorbing material for low-frequency wave absorption, in parts by weight, the iron-based magnetic foam absorbing material includes the following raw material components: 55 parts of iron-manganese alloy powder; 15 parts of resin; 15 parts of carbon airgel 12 parts of sodium dodecylbenzenesulfonate; 100 parts of acetone; wherein, the resin is a mixture of polyurethane resin and epoxy resin with a mass ratio of 2.5:1.

[0050] Its preparation method specifically comprises the following steps:

[0051] S1. Weigh each raw material according to the proportion, and set aside;

[0052] S2. dissolving the resin in an organic solvent, and fully stirring to obtain a resin liquid;

[0053] S3. Add the iron-based magnetic powder into the acid solution and soak for 1 hour, stir 3 times during the period, then rinse with water 2 times, dry and add to the resin solution of S2, add dispersant at the same time, stir evenly, and then continue to mix with ultr...

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Abstract

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a low-frequency wave-absorbing iron-based magnetic foam wave-absorbing material and a preparation method thereof. The iron-based magnetic foam wave-absorbing material is prepared from, by weight, 50-65 parts of iron-based magnetic powder, 15-20 parts of resin, 10-32 parts of aerogel, 10-15 parts of a dispersant, and 80-120 parts of an organic solvent, wherein the mass ratio of the iron-based magnetic powder to the aerogel is 1: (0.2-0.5). According to the iron-based magnetic foam wave-absorbing material disclosed by the invention, the iron-based magnetic powder is used as a main wave-absorbing material and is matched with the raw materials such as the foam resin and the aerogel, so that the obtained wave-absorbing material is uniform in texture, low in density and good in wave-absorbing performance; and the preparation method is simple in process, easy to process and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing materials, and in particular relates to a low-frequency wave-absorbing iron-based magnetic foam wave-absorbing material and a preparation method thereof. Background technique [0002] The absorbing material is a functional material that allows the incident electromagnetic wave to enter the material to the maximum extent, and can effectively absorb and attenuate the incident electromagnetic wave, convert it into heat energy and other forms of energy and lose it or make the electromagnetic wave disappear due to interference. . [0003] The loss mechanism of absorbing materials can be roughly divided into the following categories: 1) Resistive loss, this type of absorption mechanism is related to the resistive loss of the conductivity of the material, that is, the greater the conductivity, the greater the macroscopic current caused by the carrier , which is conducive to the conversion of elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L63/00C08K7/26C08K3/18C08K3/08C08K7/24C08K3/02C08J9/28H05K9/00
CPCC08J9/0066C08J9/0061C08J9/28H05K9/0081C08J2375/04C08J2463/00
Inventor 邵萌段晓峰
Owner 江西伟普科技有限公司
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