A method for preparing layered graphene magnesium-based electromagnetic shielding material
A technology of electromagnetic shielding material and layered structure, which is applied in the direction of metal layered products, chemical instruments and methods, coatings, etc., can solve the problems that the structure and function of light metal materials cannot be taken into account, so as to improve the electromagnetic shielding performance and facilitate operation , increase the effect of absorption
Inactive Publication Date: 2020-05-08
HARBIN INST OF TECH
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Problems solved by technology
[0004] The present invention solves the technical problem that the structure and function of light metal materials cannot be taken into account; and provides a method for preparing a layered graphene-magnesium-based electromagnetic shielding material
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specific Embodiment approach 1
[0024] The specific embodiment one, a kind of method for preparing the graphene magnesium-based electromagnetic shielding material of layered structure in the present embodiment is carried out according to the following steps:
[0025] Step 1. Grind the magnesium foil with 2000# sandpaper on the pre-grinder to remove the oxide film on the surface of the magnesium foil, then place it on a heating table and heat it to 150°C, pour the graphene dispersion liquid into the watering can, and connect the watering can Air compressor, the graphene dispersion is carried to the surface of the magnesium foil by spraying compressed air, and the absolute ethanol in the graphene dispersion evaporates rapidly at high temperature, leaving graphene deposited on the surface of the magnesium foil to obtain a graphene / magnesium layer shape primitive;
[0026] Step 2. Stack 50 sheets of graphene / magnesium layered elements obtained in step 1 layer by layer, and then sinter them under vacuum hot press...
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Abstract
The invention discloses a method for preparing graphene magnesium-based electromagnetic shielding material adopting a layered structure, belongs to the technical field of electromagnetic shielding materials, and aims to solve the problem that a functional material often cannot balance the strength. General electromagnetic shielding metal materials, such as copper and nickel, are too high in density, so that lightweight application to aerospace cannot be achieved; by the method provided by the invention, structural metal magnesium with the lowest density is used, mechanical properties of a magnesium matrix are improved while the electromagnetic shielding performance of the magnesium matrix is improved, and a graphene magnesium-based composite material with structural and functional integration is prepared. The method comprises the following steps: 1, removing an oxide film on the surface of a magnesium foil, then heating to 90-200 DEG C, then spraying the surface of the magnesium foil with a graphene dispersion to obtain graphene / magnesium layered elements; 2, stacking the graphene / magnesium layered elements obtained in the step 1 layer by layer, and then performing vacuum hot-pressing sintering to obtain the graphene magnesium-based electromagnetic shielding material adopting the layered structure. The graphene magnesium-based electromagnetic shielding material is applied to the field of aerospace.
Description
technical field [0001] The invention belongs to the technical field of electromagnetic shielding materials; in particular, it relates to a method for preparing a graphene-magnesium-based electromagnetic shielding material with a layered structure. Background technique [0002] As the lightest structural material, magnesium has high specific strength and specific stiffness, and is widely used in aerospace. Magnesium has excellent electromagnetic shielding performance. It is an ideal light-weight, high-strength metal material that can also have electromagnetic shielding performance. . [0003] However, functional materials often cannot take into account the issue of strength. General electromagnetic shielding metal materials, such as copper and nickel, are too dense to be lightweight and used in aerospace. Contents of the invention [0004] The invention aims to solve the technical problem that the structure and function of light metal materials cannot be taken into account...
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IPC IPC(8): B32B15/01B32B15/04B32B33/00B05D7/14B05D7/24
CPCB05D7/14B05D7/24B05D2202/20B32B15/01B32B33/00B32B2255/06B32B2255/20B32B2307/212
Inventor 王晓军向烨阳孟令龙施海龙胡小石吴昆
Owner HARBIN INST OF TECH