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Wave-absorbing material, preparation method thereof and stealth device

A technology of wave-absorbing material and wave-absorbing coating, which is applied in wave-absorbing material, stealth device, and its preparation field, and can solve the problems of high magnetic permeability and low dielectric constant, etc.

Pending Publication Date: 2022-07-01
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The main purpose of the present invention is to provide a wave-absorbing material, its preparation method and cloaking device, so as to solve the problem that the existing wave-absorbing materials cannot meet the requirements of high magnetic permeability, low dielectric constant, good matching, and strong absorption at low frequencies at the same time. Performance, corrosion resistance and anti-oxidation good absorbing materials and other performance requirements

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  • Wave-absorbing material, preparation method thereof and stealth device
  • Wave-absorbing material, preparation method thereof and stealth device

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preparation example Construction

[0023] As described in the background art, the existing wave absorbing materials cannot simultaneously meet the performance requirements of wave absorbing materials with high magnetic permeability, low dielectric constant, good matching, strong absorption performance, and good corrosion resistance and oxidation resistance at low frequencies. In order to solve the above-mentioned technical problems, the present application provides a preparation method of a wave absorbing material, and the preparation method of the wave absorbing material comprises: mixing a solution containing ferric ions and barium ions with flaky carbonyl iron powder to obtain a reaction solution; A pH regulator is used to adjust the pH of the reaction solution to 8-10, so that a precipitation reaction occurs to obtain a precipitation product; and the precipitation product is dried to obtain a wave absorbing material.

[0024] Through the above preparation method, a wave absorbing material composited with fla...

Embodiment 1

[0045] A method for preparing flaky carbonyl iron powder coated with low-frequency flaky hexagonal ferrite, the technological process is as follows figure 1 shown, including the following steps:

[0046] 1. Preparation of flake carbonyl iron powder

[0047] Add 200 parts of spherical carbonyl iron powder to 500 parts of anhydrous ethanol, stir evenly, put it into a horizontal planetary ball mill for wet ball milling, the ball milling speed is 400r / min, and the ball milling time is 15h; The mass ratio of the agate beads and carbonyl iron powder used in the ball milling is 10:4. The agate beads are composed of large, medium and small agate beads with diameters of 10mm, 6mm and 3mm. The mass ratio of the large, medium and small agate beads is 5:25:70. After the ball milling, the slurry was taken out and dried at 40 °C for 12 h to obtain flat carbonyl iron powder.

[0048] 2. Pretreatment of carbonyl iron powder

[0049] Add 100 parts of flaky carbonyl iron powder to 5% dilute...

Embodiment 2

[0055] A method for preparing flaky carbonyl iron powder coated with low-frequency flaky hexagonal ferrite, comprising the following steps:

[0056] 1. Preparation of flake carbonyl iron powder

[0057] Add 200 parts of spherical carbonyl iron powder to 500 parts of anhydrous ethanol, stir evenly, put it into a horizontal planetary ball mill for wet ball milling, the ball milling speed is 400r / min, and the ball milling time is 15h; The mass ratio of the agate beads and carbonyl iron powder used in the ball milling is 10:4. The agate beads are composed of large, medium and small agate beads with diameters of 10mm, 6mm and 3mm. The mass ratio of the large, medium and small agate beads is 5:25:70. After the ball milling, the slurry was taken out and dried at 40 °C for 12 h to obtain flat carbonyl iron powder.

[0058] 2. Pretreatment of carbonyl iron powder

[0059] Add 100 parts of flaky carbonyl iron powder to 5% dilute hydrochloric acid for sonication for 4 minutes, place t...

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Abstract

The invention provides a wave-absorbing material, a preparation method thereof and a stealth device. The preparation method of the wave-absorbing material comprises the following steps: mixing a solution containing ferric ions and barium ions with flaky carbonyl iron powder to obtain a reaction solution; adjusting the pH value of the reaction liquid to 8-10 by using a pH regulator, so that the reaction liquid is subjected to a precipitation reaction to obtain a precipitation product; and drying the precipitation product to obtain the wave-absorbing material. The wave-absorbing material with high magnetic conductivity, low dielectric constant, good matching property and strong wave-absorbing property at low frequency can be finally obtained by compounding the flaky carbonyl iron powder and the flaky hexagonal ferrite with relatively good absorbing property. And meanwhile, the material also has relatively good corrosion resistance and oxidation resistance. In addition, the preparation method has the advantages of being simple in technological process, mild in technological condition, low in cost and the like.

Description

technical field [0001] The present invention relates to the field of wave absorbing materials, in particular, to a wave absorbing material, a preparation method thereof and a stealth device. Background technique [0002] The stealth material reduces the reflected wave by absorbing the radiated electromagnetic wave. When the energy of the reflected echo is reduced to a certain level, the feedback signal is not recognized by the radar, that is, the radar stealth is realized. Carbonyl iron powder has the advantages of high magnetic permeability, strong absorption efficiency and thin matching thickness at low frequency, and has the potential to become a practical wave absorbing material in the low frequency band, but at the same time, its dielectric constant and density are large, low corrosion resistance, and spectral characteristics. The disadvantages such as poor low frequency absorption performance also limit its use effect. Ferrite is a kind of double complex medium, it no...

Claims

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Application Information

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IPC IPC(8): C01G49/00C01G49/16C09D5/32C09D5/30
CPCC01G49/0036C01G49/16C09D5/32C09D5/30C01P2004/80C01P2004/62C01P2004/20C01P2006/11C01P2006/90
Inventor 刘若鹏赵治亚刘志礼
Owner LUOYANG INST OF CUTTING EDGE TECH
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