Electromagnetic shield unit

An electromagnetic shielding and carbon fiber technology, applied in the field of electromagnetic shielding units, can solve the problems of high density, low cost of electromagnetic shielding paint, poor electromagnetic shielding effect, etc., and achieve the effect of improving wave absorption efficiency, good electrical conductivity and magnetic permeability

Inactive Publication Date: 2019-01-08
泉州兴哲商贸有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Electromagnetic shielding materials are regarded as the key development direction by all countries in the world. However, at present, electromagnetic shielding coatings are low in cost, simple and practical, but the electromagnetic shielding effect is not good. Structural electromagnetic shielding materials generally use metal fillers, etc., which have high density and are electromagnetically Shielding performance needs to be further improved

Method used

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preparation example Construction

[0023] The application also discloses the preparation process of the above-mentioned electromagnetic shielding unit:

[0024] S1, Prepare the waveguiding layer

[0025] S2, heat-treating the carbon fiber to remove surface impurities; then configuring an electroplating solution, using a silver plate as the anode, and the heat-treated carbon fiber as the cathode, both the anode and the cathode are immersed in the electroplating solution, and the silver-plated carbon fiber is obtained by electroplating;

[0026] S3, soak the silver-plated carbon fiber in the diluted silane coupling agent for 1min, and cut the silver-plated carbon fiber into 3-5mm and 7-9mm lengths after drying; Rubber is used as the matrix, silver-plated carbon fiber is used as the filler, and isopropanol is used as the antifreeze agent to prepare the wave-absorbing layer;

[0027] S4, embedding the wave-absorbing layer inside the wave-guiding layer to obtain the electromagnetic shielding unit.

[0028] Wherein...

Embodiment 1

[0036] An electromagnetic shielding unit, the electromagnetic shielding unit is a double-layer structure, the outer layer is a wave-guiding layer, the inner layer is a wave-absorbing layer, the wave-guiding layer is made of a copper alloy sheet, and the wave-absorbing layer is based on silicon rubber , and filled with silver-plated carbon fibers, the carbon fibers are in the form of short rods, distributed randomly among them.

[0037] The preparation process of the electromagnetic shielding unit is:

[0038] S1, the waveguide layer is made of copper alloy sheet material, the copper content in the material is 76%, the iron content is 13%, the zinc content is 11%, and the thickness of the waveguide layer is 1mm;

[0039] S2. First, select carbon fiber with a density of 1.75g / cm and a diameter of 5 μm. Place the carbon fiber in a box furnace at 400°C for 30 minutes to remove surface colloidal impurities; then take silver sulfate, ammonium chloride, boric acid, dodecyl Prepare t...

Embodiment 2

[0048] An electromagnetic shielding unit, the electromagnetic shielding unit is a double-layer structure, the outer layer is a wave-guiding layer, the inner layer is a wave-absorbing layer, the wave-guiding layer is made of a copper alloy sheet, and the wave-absorbing layer is based on silicon rubber , and filled with silver-plated carbon fibers, the carbon fibers are in the form of short rods, distributed randomly among them.

[0049] The preparation process of the electromagnetic shielding unit is:

[0050] S1, the waveguide layer is made of copper alloy sheet material, the copper content in the material is 76%, the iron content is 13%, the zinc content is 11%, and the thickness of the waveguide layer is 1mm;

[0051] S2. First, select carbon fiber with a density of 1.75g / cm and a diameter of 5 μm. Place the carbon fiber in a box furnace at 400°C for 30 minutes to remove surface colloidal impurities; then take silver sulfate, ammonium chloride, boric acid, dodecyl Prepare t...

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Abstract

The invention relates to an electromagnetic shielding unit, wherein the electromagnetic shielding unit is arranged in a double-layer structure; the outer layer is a waveguide layer and the inner layeris a microwave absorbing layer; the waveguide layer adopts a red copper alloy thin plate; the microwave absorbing layer takes silicon rubber as a matrix and is filled with silver-plated carbon fibers; and the carbon fibers are in a short rod shape and are randomly distributed in the electromagnetic shielding unit.

Description

technical field [0001] The present application relates to the technical field of electromagnetic shielding, in particular to an electromagnetic shielding unit. Background technique [0002] With the development of electronic technology, various electronic devices are being applied in the direction of complexity and multi-function. On the one hand, due to the increasing frequency and wide coverage of electromagnetic wave applications, electromagnetic interference has become an unavoidable problem for many electronic devices; So vulnerable. Electromagnetic shielding is becoming more and more important. [0003] In the traditional electromagnetic shielding technology, electromagnetic shielding materials are mainly divided into coating type and structural type. Coating-type materials are also called wave-absorbing coatings. The main features are strong adaptability to the target shape and simple preparation. They mainly include ferrite wave-absorbing materials, nano-wave abso...

Claims

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Application Information

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IPC IPC(8): H05K9/00B32B25/02B32B15/06B32B25/20B32B33/00
CPCH05K9/0088B32B15/06B32B25/02B32B25/20B32B33/00B32B2250/02B32B2262/106B32B2307/212B32B2457/00
Inventor 邓英
Owner 泉州兴哲商贸有限公司
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