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Wave-absorbing material and preparation method thereof

A wave absorbing material and ball milling technology, applied in chemical instruments and methods, other chemical processes, electrical components, etc., can solve the problem that the wave absorbing material cannot meet the stealth technology at the same time, and achieve good wave absorbing effect, high magnetic permeability, The effect of improving the low frequency absorbing performance

Pending Publication Date: 2019-06-28
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a single absorbing material cannot simultaneously meet the requirements of "thin, light, wide, and strong" required by stealth technology

Method used

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  • Wave-absorbing material and preparation method thereof

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preparation example Construction

[0017] The preparation method of the wave-absorbing material provided by the invention comprises:

[0018] Add FeSiAl powder to the ball mill jar with a mass ratio of 1:4 to 10, and add an appropriate amount of C 1 -C 4 Alcohol solution, under the condition of rotating speed of 250-350rpm, ball mill for 24h-48h to obtain flake FeSiAl powder after ball milling. FeSiAl powder is oxidized, where, C 1 -C 4 The alcohol solution is selected from one or more combinations of methanol, ethanol, ethylene glycol, propanol, isopropanol and n-butanol.

[0019] According to the mass fraction of FeSiAl powder after ball milling in the mixture composed of FeSiAl powder after ball milling and carbonyl iron powder is 10% to 30%, weigh carbonyl iron powder and flake FeSiAl powder after ball milling and mix, and then according to the above The mass fraction of the mixture in both the above mixture and the binder is 70% to 80%, and the binder is weighed, and the above mixture is mixed with the...

Embodiment 1

[0022] Ball milling of FeSiAl powder: at a ball mass ratio of 1:4, add FeSiAl powder into the ball mill tank, and add an appropriate amount of absolute ethanol solution, and ball mill for 24 hours at a speed of 350rpm to obtain flake FeSiAl powder. Before ball milling, vacuumize the ball mill tank and pass nitrogen gas to remove the air in the tank and prevent the FeSiAl powder from being oxidized during the ball milling process.

[0023] Preparation of wave-absorbing material M1: Weigh 7g of ball-milled flaky FeSiAl powder and 63g of carbonyl iron powder, mix them evenly, add 30g of paraffin, and mix thoroughly to prepare a wave-absorbing material.

Embodiment 2

[0025] Ball milling of FeSiAl powder: Add FeSiAl powder to the ball mill tank at a mass ratio of 1:7, and add an appropriate amount of methanol solution, and ball mill for 48 hours at a speed of 250rpm to obtain flake FeSiAl powder. Vacuumize the ball mill tank and pass nitrogen gas to remove the air in the tank and prevent the FeSiAl powder from being oxidized during the ball milling process.

[0026] Preparation of wave-absorbing material M2: Weigh 21g of ball-milled flaky FeSiAl powder and 49g of carbonyl iron powder, mix well, add 30g of paraffin, and mix thoroughly to prepare wave-absorbing material.

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Abstract

The invention provides a wave-absorbing material and a preparation method thereof. The wave-absorbing material is prepared by adhering carbonyl iron powder with ferrum silicon aluminum (FeSiAL) powderby virtue of an adhesive, the FeSiAL powder has higher dielectric constant and initial magnetic conductivity than the carbonyl iron powder and a relatively good wave-absorbing material in a low frequency band, and the carbonyl iron powder has relatively high magnetic conductivity and a good wave-absorbing material in a high frequency band, so that the wave-absorbing material prepared through themixing of two types of powder is integrated with the advantages of two types of powder, the low-frequency wave-absorbing performance of the wave-absorbing material is improved, and the wave-absorbingfrequency band of the wave-absorbing material is broadened; and the preparation method is simple and easy to polarize, and the prepared wave-absorbing material can be widely applied to high-temperature-resistant anti-interference equipment such as aerospace stealth, electronic integrated circuits and electronic appliances and can be also applied to wave-absorbing dark rooms for the prevention of information leakage, medical treatment detection, wave-absorbing detection and the like.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of information technology in our country, electromagnetic wave technology is widely used in modern fields such as communication, broadcasting and network. In order to reduce or weaken the electromagnetic interference caused by electromagnetic radiation, the requirements for electromagnetic compatibility technology are getting higher and higher. The technologies currently used mainly include electromagnetic shielding and anti-electromagnetic interference technology, making the research on absorbing materials a hot issue. [0003] Among the absorbing materials, absorbing agents play a role in absorbing loss, such as carbonyl iron, ferrite, barium titanate, etc. Among them, carbonyl iron powder has the characteristics of good wave absorption effect and wide absorpti...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00
Inventor 不公告发明人
Owner LUOYANG INST OF CUTTING EDGE TECH
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