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Wave-absorbing agent and preparation method thereof

A wave absorbing agent and ball milling technology, applied in the field of wave absorbing materials, can solve the problem that the low frequency wave absorbing performance of radar waves needs to be improved, and achieve the effects of realizing anisotropic characteristics, preventing the spread of electromagnetic information, and improving the magnetic permeability.

Pending Publication Date: 2020-04-28
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Among the absorbing materials, absorbing materials play the role of absorbing loss, such as carbonyl iron, ferrite, barium titanate, etc. Carbonyl iron has good temperature stability and high radar wave permeability, and the industrial technology is mature. , is one of the more researched absorbing materials, but its radar wave low-frequency absorbing performance needs to be improved

Method used

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  • Wave-absorbing agent and preparation method thereof

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preparation example Construction

[0020] The preparation method of wave absorbing agent provided by the invention comprises the following steps:

[0021] First, carbonyl iron powder, C 1 -C 4 The alcohol solution is mixed uniformly and then ball milled to obtain a slurry. In the above steps, 200-600 parts of carbonyl iron powder and 630-790 parts of C 1 -C 4 Mix the alcohol solution evenly, then put it into a ball mill tank for wet milling, and ball mill in a horizontal planetary ball mill, the speed of the ball mill is 300-450r / min, and the ball milling time is 12-18h. In the horizontal planetary ball mill, the zirconium used The beads are composed of large and medium zirconium beads with diameters of 10mm and 6mm respectively. The mass ratio of the large and medium zirconium beads is 5-20:80-95, and the total weight of the large and medium zirconium beads is 2- 3Kg, the mass ratio of zirconium beads to carbonyl iron powder is 40-100:1, and the carbonyl iron powder after ball milling is a flake structure ...

Embodiment 1

[0025] In parts by mass, mix 200 parts of carbonyl iron powder with 630 parts of ethanol solution evenly, then put them into a ball mill tank for wet milling, and ball mill in a horizontal planetary ball mill with a ball mill speed of 300r / min and a ball milling time of 12h, to obtain slurry. In the horizontal planetary ball mill, the zirconium beads used are composed of large and medium zirconium beads with diameters of 10mm and 6mm respectively. The mass ratio of zirconium beads is 5:80.

[0026] The above slurry is heated and dried at 80° C. for 5 hours to obtain a wave absorbing agent, wherein the thickness of the carbonyl iron powder in the finally obtained wave absorbing agent is about 0.5 μm.

Embodiment 2

[0028] In parts by mass, 600 parts of carbonyl iron powder and 790 parts of methanol solution were evenly mixed, then put into a ball mill tank for wet milling, and ball milled in a horizontal planetary ball mill with a ball mill speed of 450r / min and a ball milling time of 18 hours. In the horizontal planetary ball mill, the zirconium beads used are composed of large and medium zirconium beads with diameters of 10mm and 6mm respectively. The mass ratio of zirconium beads is 20:95.

[0029] The above slurry was heated and dried at 40° C. for 8 hours to obtain a wave absorbing agent, wherein the thickness of the carbonyl iron powder in the finally obtained wave absorbing agent was about 1 μm.

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Abstract

The invention provides a wave absorbing agent and a preparation method thereof. The preparation method comprises: uniformly mixing carbonyl iron powder and a C1-C4 alcoholic solution, and carrying outball milling to obtain a slurry; and heating and drying the slurry to obtain the wave absorbing agent. According to the invention, carbonyl iron powder is subjected to ball milling, so that the morphology is changed into a sheet structure with a certain width-thickness ratio from spherical particles, the anisotropy characteristic is achieved, the eddy current effect is inhibited, the magnetic conductivity is improved, and the wave absorbing performance is improved; compared with the wave absorbing performance of untreated carbonyl iron powder, the peak strength and the bandwidth of the treated carbonyl iron powder are obviously improved; and the method is simple in preparation process and easy to popularize, and can be widely applied to the fields of aerospace, antenna radar, aircraft stealth and the like.

Description

technical field [0001] The invention relates to the field of wave-absorbing materials, in particular to a wave-absorbing agent and a preparation method thereof. Background technique [0002] Radar wave absorbing materials are widely used in civil communication and military stealth. The stealth and anti-stealth applications of radar wave low-frequency S-band (1.5-3.5GHz) are getting more and more attention at present, and civilian 3G and 4G communications are also falling behind. In this frequency band, its application technology is still a bottleneck. Therefore, it is very necessary and urgent to study the absorbing materials with good absorbing characteristics in the low-frequency S-band of radar waves. [0003] Among the absorbing materials, absorbing materials play the role of absorbing loss, such as carbonyl iron, ferrite, barium titanate, etc. Carbonyl iron has good temperature stability and high radar wave permeability, and the industrial technology is mature. , is o...

Claims

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Application Information

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IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 刘若鹏赵治亚刘志礼
Owner LUOYANG INST OF CUTTING EDGE TECH
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