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Low-frequency P-waveband wave-absorbing material and preparation method thereof

A wave absorbing material, P-band technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of few types and poor performance, and achieve the effect of low cost, excellent wave absorption performance, and guaranteed wave absorption effect.

Active Publication Date: 2020-01-21
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the wave-absorbing materials in the prior art are mainly oriented to high-frequency applications, while the low-frequency P-band wave-absorbing materials have poor performance and fewer types, the present invention provides a low-frequency P-band wave-absorbing material and its preparation method

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  • Low-frequency P-waveband wave-absorbing material and preparation method thereof

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preparation example Construction

[0031] The invention provides a method for preparing a low-frequency P-band wave-absorbing material, the method comprising the following steps:

[0032] (1) Using the first surfactant to modify the graphene powder (functionalization treatment) to prepare a functionalized graphene dispersion.

[0033] (2) make described functionalized graphene dispersion liquid and spherical magnetic alloy particle to carry out composite by high-energy ball milling method, make functionalized graphene / flaky magnetic alloy particle composite absorbent; In the present invention, high-energy ball milling can provide grinding The collision force between the ball and the powder changes the shape of the magnetic alloy particles from spherical to flake.

[0034] (3) The second surfactant is used to coat the functionalized graphene / flaky magnetic alloy particle composite absorbent to obtain a low-frequency P-band absorbent; in the present invention, the time of the coating treatment For example, it is...

Embodiment 1

[0059] Prepare a low-frequency P-band wave-absorbing material, the preparation method is as follows:

[0060] ① Functionalized graphene dispersion: weigh 85 parts by weight of graphene powder, 7 parts by weight of KH-550 modifier, 1.7 parts by weight of ANTI-TERRA-204 dispersant, 1.3 parts by weight of BYK-181 wetting agent, and place In the absolute ethanol solvent, the homogenizer is stirred and dispersed at a high speed to obtain a uniformly mixed functionalized graphene dispersion.

[0061] ②Functionalized graphene / flaky magnetic alloy particle composite absorbent: Weigh 25 parts by weight of functionalized graphene dispersion; 65 parts by weight of spherical iron-cobalt alloy particles, 1.5 parts by weight of calcium carbonate research aid, n-butanol process 60 parts by weight of the control agent are added to the functionalized graphene dispersion, the ball-to-material ratio is 16:3, and high-energy ball milling is carried out for 10h to obtain a mixed solution containin...

Embodiment 2

[0066] Prepare a low-frequency P-band wave-absorbing material, the preparation method is as follows:

[0067] ① Functionalized graphene dispersion: weigh 90 parts by weight of graphene powder, 6 parts by weight of KH-550 modifier, 1.5 parts by weight of ANTI-TERRA-204 dispersant, and 1.5 parts by weight of BYK-181 wetting agent, and place In the absolute ethanol solvent, the homogenizer is stirred and dispersed at a high speed to obtain a uniformly mixed functionalized graphene dispersion.

[0068] ②Functionalized graphene / flaky magnetic alloy particle composite absorbent: Weigh 25 parts by weight of functionalized graphene dispersion; 80 parts by weight of spherical iron-nickel alloy particles, 1.5 parts by weight of calcium carbonate research aid, n-butanol process 60 parts by weight of the control agent are added to the functionalized graphene dispersion, the ball-to-material ratio is 16:3, and high-energy ball milling is carried out for 10h to obtain a mixed solution conta...

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Abstract

The invention relates to a low-frequency P-waveband wave-absorbing material and a preparation method thereof. The method comprises the following steps: modifying graphene powder by adopting a first surfactant to prepare functionalized graphene dispersion liquid; compounding the functionalized graphene dispersion liquid with spherical magnetic alloy particles through a high-energy ball milling method to prepare a functionalized graphene / flaky magnetic alloy particle composite absorbent; carrying out coating treatment on the composite absorbent by adopting a second surfactant to prepare a low-frequency P-waveband absorbent; and mixing the low-frequency P-waveband absorbent with ethylene propylene terpolymer, and carrying out rubber mixing and calendering processes to obtain the low-frequencyP-waveband wave-absorbing material. A new idea is provided for expanding the low-frequency P-waveband wave-absorbing material, the effective absorption bandwidth of the prepared wave-absorbing material can be flexibly adjusted within the waveband range of 0.3-1.0 GHz according to needs, and meanwhile the material has good mechanical and construction performance after being formed and is easy to adhere to surfaces of various structural parts.

Description

technical field [0001] The invention belongs to the technical field of preparation of wave-absorbing materials, and in particular relates to a low-frequency P-band wave-absorbing material and a preparation method thereof. Background technique [0002] Looking at the development status of mainstream technologies, the commonly used technical approaches to reduce target radar echo intensity mainly include shape modification and absorbing materials. Shape modification can solve at least half of the problems, but it is found in practical applications that shape modification will make processing Increased difficulty, increased cost, and the impact of the target's own functionality, so that many targets cannot use shape modification technology. [0003] Absorbing materials can make up for the shortcomings of shape modification, and are not affected by complex shapes, and are more flexible in use. Therefore, the application of wave-absorbing materials has become a relatively conveni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K9/10C08K9/06C08K3/04C08K7/18C09K3/00
CPCC08K9/10C08K9/06C08K3/042C08K7/18C09K3/00C08L23/16
Inventor 孙新杨智慧贺军哲聂文君张连平
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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