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Manufacturing method for aluminum-based electromagnetic absorption plate

A technology of plate production and aluminum alloy plate, which is applied in the direction of electrical components, magnetic/electric field shielding, anodic oxidation, etc., can solve the problems of inability to meet the requirements of electromagnetic radiation protection, inability to apply large-scale applications in the construction field, and low efficiency of electromagnetic wave shielding. High-efficiency shielding effect, meeting protection requirements, and low-cost effects

Active Publication Date: 2013-07-10
东莞旭光五金氧化制品有限公司
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] However, this thin plate type electromagnetic wave absorber still has some disadvantages
Due to the inconvenience and high cost of use, it cannot be applied on a large scale in the construction field.
Moreover, the shielding efficiency of electromagnetic waves is still relatively low, which cannot meet people's protection needs for electromagnetic radiation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0040] The protective film in step a is a paraffin film, which is formed on the surface of the workpiece after natural drying of liquid paraffin, solid paraffin solution or a diluted solution of the two in any ratio with a solvent.

[0041] The acid bath used for the first anodic oxidation in step c is sulfuric acid with a concentration of 100-300g / l, the temperature is maintained at 20-28 degrees Celsius, the anodic oxidation time is 20-50 minutes, and the oxidation voltage is 10-13V;

[0042] In step f, the electromagnetic absorbing material is water-based nano-Fe 3 o 4 Slurry, the water-based nano-Fe3O4 slurry has a solid mass percentage of 5%-40%, and the surfactant is polyethylene glycol, and its mass percentage is 0.5%-3%;

[0043] The sealing agent described in step g is a nickel sealing agent; the nickel sealing agent contains ferromagnetic nickel, which is beneficial to electromagnetic absorption.

[0044] In order to make the surface of the board have a delicate an...

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Abstract

The invention discloses a manufacturing method for an aluminum-based electromagnetic absorption plate. The method comprises the following steps of: coating a protective membrane on the surface of an aluminum or aluminum alloy workpiece, and performing sand blasting and anodic oxidation on the workpiece to form a plurality of conical structures with micropores on the surface of the plate; and spraying or dip-coating an electromagnetic wave-absorbing material on the surfaces of the structures. The manufacturing method is favorable for decomposition and consumption of electromagnetic wave energy, realizes the high-efficiency electromagnetic absorption performance of the aluminum-based electromagnetic absorption plate, is low in manufacturing cost, and can be applied to the fields of buildings, electron and military industry on a large scale.

Description

technical field [0001] The invention relates to a manufacturing method of an electromagnetic absorbing plate, in particular to a manufacturing method of an electromagnetic absorbing plate with aluminum and its alloy as a base material. The electromagnetic absorbing plate produced by the method can achieve the effect of electromagnetic shielding. Background technique [0002] Electromagnetic shielding is to use the electromagnetic shielding body to attenuate electromagnetic waves to reduce various adverse effects and harms caused by electromagnetic radiation. In the past, electromagnetic shielding technology was mainly used for industrial enterprise laboratories. Now it is the era of popularization of mobile phones and computers. In order to prevent various industrial equipment and civil electrical equipment from being harmed by electromagnetic wave interference, and to prevent information leakage caused by eavesdropping, It is very necessary to adopt electromagnetic shieldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/04H05K9/00
Inventor 范海陆吴焯佳吴焯光吴沛强王长江
Owner 东莞旭光五金氧化制品有限公司
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