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Electromagnetic shielding coating as well as preparation method and application thereof

An electromagnetic shielding coating and electromagnetic shielding technology, applied in magnetic coatings, epoxy resin coatings, coatings, etc., can solve the problems of complex composition and high cost

Inactive Publication Date: 2021-07-30
SHENZHEN YN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of the amorphous alloy powder used is higher than that of iron-based amorphous magnetic powder, and the composition is complex

Method used

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  • Electromagnetic shielding coating as well as preparation method and application thereof
  • Electromagnetic shielding coating as well as preparation method and application thereof
  • Electromagnetic shielding coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of electromagnetic shielding coating of the present embodiment is prepared by the following method:

[0034] (1) Change the composition to Fe bal. Cu 1 Nb 3 Si 15.5 B 7 (at.%), iron-based nanocrystalline alloy strips with a thickness of 18-20 μm are crystallized and embrittled in a furnace chamber with a nitrogen protection atmosphere and heated to 550° C. for 1 hour.

[0035] (2) The iron-based nanocrystalline strip material after crystallization and embrittlement in step (1) is broken into flat powder by jet milling, and the broken powder is sieved by a sieve with a particle size of 200 to 270 mesh to obtain Flat fine powder; the scanning electron microscope picture of gained flat fine powder is as figure 1 shown.

[0036] (3) uniformly mixing the flat fine powder in step (2) with epoxy resin and diluting solvent ethanol to obtain the electromagnetic shielding coating.

Embodiment 2

[0038] A kind of electromagnetic shielding coating of the present embodiment is prepared by the following method:

[0039] (1) Change the composition to Fe bal. Cu 1 Nb 3 Si 15.5 B 7 (at.%), iron-based nanocrystalline alloy strips with a thickness of 14 to 16 μm are heated to 530° C. for 1.5 hours in a furnace chamber with a nitrogen protection atmosphere for crystallization and embrittlement treatment;

[0040] (2) The iron-based nanocrystalline strip material after crystallization and embrittlement in step (1) is broken into flat powder by jet milling, and the broken powder is sieved by a sieve with a particle size of 500 mesh to obtain a flat fine powder. powder; the scanning electron microscope picture of gained flat fine powder is as figure 2 shown.

[0041] (3) uniformly mixing the flat fine powder in step (2) with acrylic resin and diluting solvent ethylene glycol to obtain the electromagnetic shielding coating.

Embodiment 3

[0043] A kind of electromagnetic shielding coating of the present embodiment is prepared by the following method:

[0044] (1) Change the composition to Fe bal. Cu 1 Nb 3 Si 15.5 B 7 (at.%), iron-based nanocrystalline alloy strips with a thickness of 23 to 25 μm are heated to 620° C. for 0.5 hours in a furnace chamber with a nitrogen protection atmosphere for crystallization and embrittlement treatment;

[0045] (2) The iron-based nanocrystalline strip material after crystallization and embrittlement in step (1) is broken into flat powder by jet milling, and the broken powder is sieved by a sieve with a particle size of 100 to 200 mesh to obtain Flat fine powder; the scanning electron microscope picture of gained flat fine powder is as image 3 shown.

[0046] (3) uniformly mixing the flat fine powder in step (2) with acrylic resin and diluting solvent ethylene glycol to obtain the electromagnetic shielding coating.

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Abstract

The invention belongs to the technical field of electromagnetic shielding, and discloses an electromagnetic shielding coating as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out heating crystallization and embrittlement treatment on an iron-based nanocrystalline alloy strip with the thickness of less than 25 microns, then crushing the iron-based nanocrystalline alloy strip into flat powder, screening to obtain flat fine powder, and uniformly mixing the flat fine powder with film-forming resin and a diluting solvent to obtain the electromagnetic shielding coating. The application method of the electromagnetic shielding coating in preparation of the electromagnetic shielding coating comprises the following steps: completing preparation of the electromagnetic shielding coating in a spraying manner, placing a workpart to be sprayed with the electromagnetic shielding coating on a magnetic platform, and during spraying operation, and the flat surface of the flat iron-based nanocrystalline magnetic fine powder is parallel to a sprayed surface under the action of a magnetic field, so that the electromagnetic shielding effect is improved. The preparation method of the electromagnetic shielding coating is simple and low in cost, and the obtained coating has a remarkably enhanced electromagnetic shielding effect and has very good application prospects and commercial value.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic shielding, and in particular relates to an electromagnetic shielding paint and its preparation method and application. Background technique [0002] In recent years, with the technological progress in the field of electronic information and the development of power electronics technology, the operating frequency of various components has become higher and higher, resulting in a large amount of electromagnetic radiation pollution, which not only affects the work of the components themselves, but also affects the There are potential hazards in other surrounding power electronic facilities. For example, photovoltaic power generation has been widely promoted now, but photovoltaic inverters will generate a large amount of electromagnetic radiation during operation, pollute local power grids, and even cause damage to surrounding power electronic facilities. Traditional soft magnetic materials s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/04C09D7/61C09D5/23
CPCC08K2003/023C08K2003/085C08K2003/0856C09D5/23C09D133/04C09D163/00C09D7/61C08K3/08C08K3/02
Inventor 李准王湘粤张华曾志超
Owner SHENZHEN YN TECH CO LTD