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Wave-absorbing material and manufacturing method thereof

A technology of a wave absorbing material and a manufacturing method, applied in the field of wave absorbing material and its manufacturing, can solve the problems of poor impedance matching and corrosion resistance of carbonyl iron powder, large volume duty ratio of absorber, poor low frequency absorption performance, etc. The effect of improving the absorbing performance, extending the effective transmission path and improving the stability

Active Publication Date: 2021-06-22
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

However, carbonyl iron powder has poor impedance matching and corrosion resistance; large dielectric constant and poor spectral characteristics, and poor low-frequency absorption performance; high density, large volume duty ratio of the absorbent, difficult to disperse, and prone to occurrence when placed in the air for a long time oxidation

Method used

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  • Wave-absorbing material and manufacturing method thereof
  • Wave-absorbing material and manufacturing method thereof
  • Wave-absorbing material and manufacturing method thereof

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preparation example Construction

[0039]In the traditional preparation method of forming composite absorbing materials, the core material is usually placed in a solution for chemical reaction or physical adsorption to form a composite absorbing material. By controlling the parameters such as solution concentration and reaction time, it is roughly estimated The thickness of the material layer, the traditional process is difficult to accurately control the thickness of each material layer, especially when the thickness of the material layer is required to be small, it is more difficult to control the thickness of the material layer. In order to form a capacitor-like structure, the embodiment of the present invention needs to precisely control the thickness of the gap layer at 1-10nm, so a more accurate and easy-to-control atomic layer deposition technique is used to form a sacrificial layer, and the sacrificial layer is further removed to form a gap layer, so that the atoms Layer deposition technology can precise...

Embodiment 1

[0065] In step S23, the first precursor is trimethylsilane, and in step S25, the second precursor is O 2 , in step S27, the number of cycles is 100 times; in step S33, the third precursor is magnesium dicene, and in step S35, the fourth precursor is O 2 , in step S37, the number of loops is 3000 times. Therefore, in the absorbing material 110 of this embodiment, the core 110 is carbonyl iron powder particles; the sacrificial layer 121 is a silicon dioxide layer with a thickness of 5 nm; the insulating layer 130 is magnesium oxide with a thickness of 150 nm.

Embodiment 2

[0067] In step S23, the first precursor is trimethylsilane, and in step S25, the second precursor is O 2 , in step S27, the number of cycles is 100 times; in step S33, the third precursor is bis(ethylcyclopentadienyl) magnesium, in step S35, the fourth precursor is water, in step S37 , the number of cycles is 3000 times. Therefore, in the absorbing material 110 of this embodiment, the core 110 is carbonyl iron powder particles; the sacrificial layer 121 is a silicon dioxide layer with a thickness of 5 nm; the insulating layer 130 is magnesium oxide with a thickness of 150 nm.

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Abstract

The invention discloses a wave-absorbing material and a manufacturing method thereof. The wave-absorbing material includes: a core, an insulating layer located on the outer surface of the core, and a gap layer located between the core and the insulating layer; and the core and the insulating layer have different polarities or conductivities, so that when the wave-absorbing material is located in electromagnetic waves, the core, the insulating layer and the gap layer form a capacitance-like structure which is used for absorbing at least part of the electromagnetic waves. The core, the insulating layer and the gap layer of the wave-absorbing material form the capacitance-like structure to absorb the electromagnetic waves, so that the wave-absorbing performance of the wave-absorbing material is remarkably improved; and the impedance matching characteristic of the wave-absorbing material is improved through the insulating layer, and the wave-absorbing performance of the wave-absorbing material is further improved.

Description

technical field [0001] The present invention relates to the technical field of materials, and more specifically, to a wave-absorbing material and a manufacturing method thereof. Background technique [0002] With the rapid development of electronic information technology, electromagnetic wave pollution in space is becoming more and more diverse, and electromagnetic wave pollution will bring many adverse effects to the normal operation of equipment, for example, electromagnetic interference between internal components of equipment, Electromagnetic stealth technology, microwave guidance of missiles, information leakage in the field of wireless communication, etc., so electromagnetic wave absorbing materials have received extensive attention. [0003] The absorbing material is a kind of electromagnetic shielding material. The absorbing material can absorb and attenuate the incident electromagnetic wave, and convert the electromagnetic wave into heat energy or other forms of ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C23C16/455C23C16/40C23C16/56H05K9/00
CPCC23C16/45527C23C16/56C23C16/402C23C16/403H05K9/0081B22F1/16
Inventor 刘若鹏赵治亚王侃
Owner LUOYANG INST OF CUTTING EDGE TECH
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