Wave-absorbing particle

A granular and granular technology, applied in the field of electromagnetic shielding and absorption, can solve the problems of difficult pre-ordered production, bulky, unable to meet the needs of wave absorption, etc., and achieve the effect of high-efficiency absorption

Inactive Publication Date: 2016-09-28
福建星宏新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The existing ferrite electromagnetic wave protection materials can only achieve frequency band absorption below 20 GHz, and its physical characteristics limit the development to high frequency bands. In addition, it is relatively "bulky", which can no longer meet the existing wave absorption needs.
[0006] 2) Dif

Method used

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Embodiment 1

[0031] See attached figure 1 , a wave-absorbing particle, having a granular matrix 1, the matrix 1 has a plurality of micro-carbon coils 2, and the micro-carbon coils 2 have one or more lengths to achieve the absorption effect of electromagnetic waves corresponding to different frequency domains. Optimum conditions for the invention: the micro-carbon coils 2 have various lengths between 10 microns and 5 mm, the ratio of the helical diameter to the pitch of each micro-carbon coil 2 is between 1:1-5, the diameter of the carbon wire and the helical pitch The diameter is between 1:5-10; the micro-carbon coil accounts for 0.5%-5% of the total weight, among which 1%, 2% and 3% are more commonly used weight ratios.

[0032] See attached Figure 2-4 , the morphology of the microcarbon coil 2 under the electron microscope, it can be seen that the microcarbon coil wire is a regular helical extension with an obvious pitch, which is of great significance for the realization of the absorb...

Embodiment 2

[0041] See attached Figure 8, as a means of broadening the absorption band, the present invention, on the basis of the first embodiment above, also has some conductive monomers in its matrix 1, these conductive monomers include ferrite 3 and rod-shaped carbon 4, ferrite is used To improve the inductance L, increase the magnetic loss; rod-shaped carbon 4 (nano-carbon rods or vapor-phase grown carbon fibers) affects the resistance R due to overlapping with the micro-carbon coil, increasing electrical loss; the substrate contributes to the capacitance C, increasing the dielectric Loss; These components together form a resonance system, which strengthens the LCR resonance as a whole.

[0042] In the above-mentioned embodiments, the matrix 1 can be made of polymer composite resin matrix including epoxy resin matrix, polyurethane matrix, silicone matrix, thermoplastic elastomer and the like.

[0043] The verification data of the wave-absorbing performance of the present invention ...

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Abstract

The invention proposes a wave-absorbing particle, which has a granular matrix, and is characterized in that: the matrix has a plurality of micro-carbon coils, and the micro-carbon coils have one or more lengths to realize the absorption of electromagnetic waves corresponding to different frequency domains Effect; the optimal condition of the present invention is that the micro-carbon coil has multiple lengths between 10 microns and 5 millimeters, the helical diameter of each micro-carbon coil and the ratio of the pitch between 1: 1-5, carbon filament The diameter and the helix diameter are between 1:5‑10. The invention provides a fundamental solution for effectively absorbing space electromagnetic radiation, and has the advantages of wide absorption frequency range, high efficiency, low cost, suitable for quantitative production, and easy combination with other substances. In terms of performance, they are all excellent products, suitable for promotion and use.

Description

technical field [0001] The invention relates to the technical field of electromagnetic shielding and absorption, in particular to a wave-absorbing particle. Background technique [0002] With the improvement of living standards, all kinds of electrical appliances appear in ordinary households, such as refrigerators, washing machines, mobile phones, wireless routers, etc., followed by the convenience of life, but also the trouble of electromagnetic radiation; even With little or no electrical appliances, the space we live in is still filled with electromagnetic radiation of various frequencies, which come from outdoor high-voltage transmission lines, substations, transformers, communication base stations, communication satellites, etc. Theoretically, all devices and machines that use electricity will produce a certain amount of electromagnetic radiation. These forms of electromagnetic radiation exist around us like air, which is not only harmful to the human body, but also to...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 不公告发明人
Owner 福建星宏新材料科技有限公司
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