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Method for preparing electromagnetic shielding foamed aluminum composite material

A composite material and electromagnetic shielding technology, applied in the direction of transition element hydrides, etc., can solve the problems of lack of preparation technology and achieve the effects of weakening chemical reactions, reducing burning loss, and small apertures

Active Publication Date: 2019-06-14
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of effective preparation technology for the preparation of low-cost, small-pore size, large-size and high electromagnetic shielding aluminum foam materials.

Method used

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  • Method for preparing electromagnetic shielding foamed aluminum composite material
  • Method for preparing electromagnetic shielding foamed aluminum composite material
  • Method for preparing electromagnetic shielding foamed aluminum composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The first step is to put the purchased titanium hydride into a resistance furnace at 440°C for preheating and oxidation treatment, and the treatment time is 20 minutes; during the constant temperature treatment, it needs to be stirred every 5 minutes to make it evenly oxidized and prevent its formation. Block (to ensure its full contact with the air, to ensure the period of oxidation effect to delay its hydrogen release time.); take out the air-cooled, weighed for use in the experiment.

[0052] In the second step, pour the hollow ceramic microspheres into pure water at room temperature, filter and remove the broken hollow ceramic microspheres; then put the remaining hollow ceramic microspheres into a drying vessel and dry them in a drying oven at 80°C spare.

[0053] In the third step, the commercial pure aluminum ingot is cut into 200-250g aluminum blocks, and the commercial pure magnesium is cut into small pieces with a size of 10mm×10mm, and the surface oxide layer ...

Embodiment 2

[0065] The first step is to put the purchased titanium hydride into a resistance furnace at 480°C for preheating and oxidation treatment, and the treatment time is 30 minutes; during the constant temperature treatment, it needs to be stirred every 5 minutes to make it evenly oxidized and prevent its formation. Block (to ensure its full contact with the air, to ensure the period of oxidation effect to delay its hydrogen release time.); take out the air-cooled, weighed for use in the experiment.

[0066] In the second step, pour the hollow ceramic microspheres into pure water at room temperature, filter and remove the broken hollow ceramic microspheres; then put the remaining hollow ceramic microspheres into a drying vessel and dry them in a drying oven at 90°C spare.

[0067] The third step is to cut the commercial pure aluminum ingots into 200-250g aluminum blocks, and at the same time cut the commercial pure magnesium into small pieces with a size of 9mm×9mm, and polish and r...

Embodiment 3

[0075] The first step is to put the purchased titanium hydride into a 520°C resistance furnace for preheating oxidation treatment, the treatment time is 40 minutes; during the constant temperature treatment, it needs to be stirred every 5 minutes to make it evenly oxidized and prevent its formation. Block (to ensure its full contact with the air, to ensure the period of oxidation effect to delay its hydrogen release time.); take out the air-cooled, weighed for use in the experiment.

[0076] In the second step, pour the hollow ceramic microspheres into pure water at room temperature, filter and remove the broken hollow ceramic microspheres; then put the remaining hollow ceramic microspheres into a drying vessel and dry them in a drying oven at 100°C spare.

[0077] The third step is to cut the commercial pure aluminum ingots into 200-250g aluminum blocks, and at the same time cut the commercial pure magnesium into small pieces with a size of 11mm×11mm, and polish and remove th...

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Abstract

The invention discloses a method for preparing an electromagnetic shielding foamed aluminum composite material. The method includes the steps that a magnesium block and a hollow ceramics microsphere are added by stepping composition, then, after a pre-treated titanium hydride foaming agent is added, the surface is provided with a layer of dense oxidation film, thus the mixture can be foamed intensively in a certain temperature range, the effect of aperture decreasing is realized, and finally, a novel closed-cell foamed aluminum composite material is obtained. According to the method for preparing the electromagnetic shielding foamed aluminum composite material, the obtained closed-cell foamed aluminum composite material has the characteristics of being low in cost, small in aperture, highin strength, excellent in electromagnetic shielding performance and the like.

Description

technical field [0001] The invention belongs to the technical field of metal foam preparation, and in particular relates to a method for preparing a closed-cell aluminum foam composite material with small pore size, high strength and excellent electromagnetic shielding performance. Background technique [0002] With the rapid development of electronic information technology, more and more electronic and electrical equipment have been widely used, bringing great convenience to human production and life. At the same time, serious problems such as electromagnetic pollution and electromagnetic interference have also occurred, which will not only cause mutual interference between electronic instruments and equipment, but may also lead to information leakage and even affect human health. Therefore, preventing and controlling electromagnetic radiation pollution and protecting the safety of the electromagnetic environment have become urgent problems to be solved at present. Electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/06C22C1/10C01B6/02
Inventor 夏兴川张子晨杨东辉丁俭陈学广赵彦明杨旭东
Owner HEBEI UNIV OF TECH
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