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A method for preparing copper-iron alloy mesh for electromagnetic shielding by 3D cold printing

A copper-iron alloy, electromagnetic shielding technology, applied in the fields of magnetic/electric field shielding, electrical components, metal processing equipment, etc., can solve the problem of difficult to prepare copper-iron alloy electromagnetic shielding nets, etc., to achieve flexible and controllable composition, stable performance and uniform distribution. Effect

Active Publication Date: 2021-10-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process not only has controllable composition of copper-iron alloy mesh, excellent performance, but also simple process, low cost and continuous production, which can solve the problem that it is difficult to prepare copper-iron alloy (especially high iron content) electromagnetic shielding mesh by traditional weaving technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] a. Configure suspension slurry. Hydroxyethyl methacrylate (HEMA) volume fraction 10%, toluene volume fraction 10%, copper oxide powder 56.25 g, ferric oxide powder 3.57 g, oleic acid 5 g, prepare suspension slurry, stir to mix evenly.

[0020] b. Software modeling and slicing. The mesh model was designed using Solidworks software, and the model was imported into the slicing software Cura for layered slicing processing with a layer thickness of 0.05 mm to obtain 3D model data.

[0021] c. 3D cold printing. Import the mesh model data obtained in step (b) into the 3D cold printing equipment control system, pour the slurry in step (a) into the equipment delivery system for printing, the printing speed is 60 mm / min, and the layer thickness is 0.05 mm .

[0022] d. Body degumming and reduction. The green body obtained in step (c) was degummed and reduced in a hydrogen atmosphere, the degumming and reduction temperature was 400 °C, and the holding time was 5 h.

[0023] e...

Embodiment 2

[0025] a. Configure suspension slurry. The volume fraction of hydroxyethyl methacrylate (HEMA) is 15%, the volume fraction of toluene is 10%, copper hydroxide powder 68.91 g, iron hydroxide powder 22.43 g, oleic acid 5 g, prepare suspension slurry, and stir to mix evenly.

[0026] b. Software modeling and slicing. The mesh model was designed using Solidworks software, and the model was imported into the slicing software Cura for layered slicing processing with a layer thickness of 0.05 mm to obtain 3D model data.

[0027] c. 3D cold printing. Import the mesh model data obtained in step (b) into the 3D cold printing equipment control system, pour the slurry in step (a) into the equipment delivery system for printing, the printing speed is 600 mm / min, and the layer thickness is 1 mm .

[0028] d. Body degumming and reduction. The green body obtained in step (c) was degummed and reduced in a hydrogen atmosphere, the degumming and reduction temperature was 700 °C, and the hold...

Embodiment 3

[0031] a. Configure suspension slurry. Hydroxyethyl methacrylate (HEMA) volume fraction 20%, toluene volume fraction 10%, copper carbonate powder 87.19 g, iron carbonate powder 52.14 g, oleic acid 5 g, configured into a suspension slurry, stirred to mix evenly.

[0032] b. Software modeling and slicing. The mesh model was designed using Solidworks software, and the model was imported into the slicing software Cura for layered slicing processing with a layer thickness of 0.05 mm to obtain 3D model data.

[0033] c. 3D cold printing. Import the mesh model data obtained in step (b) into the 3D cold printing equipment control system, pour the slurry in step (a) into the equipment delivery system for printing, the printing speed is 300 mm / min, and the layer thickness is 0.5 mm .

[0034] d. Body degumming and reduction. The green body obtained in step (c) was degummed and reduced in a hydrogen atmosphere, the degumming and reduction temperature was 600 °C, and the holding time ...

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Abstract

The invention provides a method for preparing a copper-iron alloy mesh for electromagnetic shielding by 3D cold printing, which relates to the field of powder metallurgy and additive manufacturing. Cold printing forming, combined with the subsequent degreasing reduction and sintering process to prepare copper-iron alloy mesh. The invention can freely regulate the iron content in the copper-iron alloy, and the iron particles are evenly and finely distributed in the copper. By flexibly changing the modeling data, the near-net-shaped electromagnetic shielding grid can be adjusted arbitrarily, and the electromagnetic shielding of ultra-fine wires can be prepared. grid. It solves the problem that the traditional weaving process is difficult to prepare copper-iron alloy electromagnetic shielding mesh, and has important application prospects in the fields of 3C electronic products and high-frequency electrification engineering.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and additive manufacturing, and relates to a method for preparing a copper-iron alloy mesh for electromagnetic shielding by using 3D cold printing. Background technique [0002] Copper-iron alloys (with an iron content of 5 wt% to 50 wt%) have excellent electrical conductivity, thermal conductivity, high strength and wear resistance, and also have excellent magnetic and electromagnetic shielding properties, and are very useful in the fields of heat dissipation and electromagnetic shielding. Broad application prospects. Copper-iron alloy mesh has good electromagnetic wave shielding effect, and can be applied to electromagnetic wave shielding protection of electronic and electrical products and equipment such as 5G. At present, the preparation of copper-iron alloy mesh is generally to prepare copper-iron alloy thin wires first, and then weave them into mesh or strip shape. This method is cumbersome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C9/00C22C38/16B22F3/10B22F5/10H05K9/00B33Y10/00B33Y70/10
CPCC22C9/00C22C38/16B22F3/1007B22F5/10H05K9/0081B33Y10/00B33Y70/00B22F1/052
Inventor 陈存广张陈增郭志猛陆天行李沛韩未豪
Owner UNIV OF SCI & TECH BEIJING