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Preparation process of aluminum-base flexible electromagnetic shielding composite material

A technology of electromagnetic shielding and composite materials, which is applied in metal material coating process, ion implantation plating, coating, etc., can solve the problems of limiting the application of shielding composite materials, not being able to shield wide frequency bands at the same time, and narrow shielding frequency bands, etc., to achieve improved Effect of electromagnetic shielding effectiveness, improvement of flexibility, and reduction of fracture tendency

Inactive Publication Date: 2011-06-29
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common problem of most electromagnetic shielding materials is that the shielding frequency band is narrow, and it cannot shield the broadband interference from low frequency to high frequency at the same time.
However, the Finemet nanocrystalline alloy has poor flexibility, high brittleness, and easy fracture, which will inevitably limit the application of this type of shielding composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation process of an aluminum-based flexible electromagnetic shielding composite material, the steps of which are as follows:

[0029] (1) The substrate is an industrially rolled aluminum foil with a thickness of 40 microns and a width of 1000 mm, which is directly rolled into a winding continuous coating machine, and the substrate is not subjected to any surface treatment before being placed in a vacuum sputtering coating chamber;

[0030] (2) After the vacuum sputtering coating chamber is loaded with the substrate, it is vacuumed to 1×10 -3 Pa, then enter Ar gas to 10Pa, apply a DC voltage of 780V between the substrate and the rod-shaped anode, the distance between the substrate and the rod-shaped anode is 50mm, generate a glow discharge, perform ion bombardment and sputtering on both sides of the aluminum foil substrate for 4min, and remove the two surfaces of the substrate oxide film; then, start the aluminum foil travel power device, so that the aluminum foi...

Embodiment 2

[0035] A preparation process of an aluminum-based flexible electromagnetic shielding composite material, the steps of which are as follows:

[0036] (1) The substrate is an industrially rolled aluminum foil with a thickness of 40 microns and a width of 1000 mm, which is directly rolled into a winding continuous coating machine, and the substrate is not subjected to any surface treatment before being placed in a vacuum sputtering coating chamber;

[0037] (2) After the vacuum sputtering coating chamber is placed in the substrate, it is vacuumed to 1×10 -3 Pa, then enter Ar gas to 10Pa, apply a DC voltage of 780V between the substrate and the rod-shaped anode, the distance between the substrate and the rod-shaped anode is 50mm, generate a glow discharge, perform ion bombardment and sputtering on both sides of the aluminum foil substrate for 4min, and remove the two surfaces of the substrate The oxide film; then, start the aluminum foil travel power device, so that the aluminum f...

Embodiment 3

[0043] A preparation process of an aluminum-based flexible electromagnetic shielding composite material, the steps of which are as follows:

[0044] (1) The substrate is an industrially rolled aluminum foil with a thickness of 40 microns and a width of 1000mm, which is directly rolled into a winding continuous coating machine, and the substrate is not subjected to any surface treatment before being placed in the vacuum sputtering coating chamber;

[0045] (2) After the vacuum sputtering coating chamber is placed in the substrate, it is vacuumed to 1×10 -3 Pa, then enter Ar gas to 10Pa, apply a 780V DC voltage between the substrate and the rod-shaped anode, the substrate-anode distance is 50mm, generate a glow discharge, implement ion bombardment sputtering on both sides of the aluminum foil substrate for 4min, and remove the two surfaces of the substrate Oxide film; then, start the aluminum foil travel power device, so that the aluminum foil travel speed is controlled at 0.1m / ...

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Abstract

The invention relates to a preparation process of an aluminum-base flexible electromagnetic shielding composite material. The process comprises the following steps of: directly loading aluminum foils and winding up rollers into a vacuum sputtering coating chamber to perform ionic bombardment sputtering to remove oxide films on the surfaces of matrixes; then sputtering and depositing Fe78Si9B13 orFe73.5Nb3Cu1Si13.5B9 alloy on the matrixes to form nano crystal films; and finally sputtering and depositing copper films or aluminum films on the nano crystal alloy films. The composite material prepared by the invention can achieve the effect of broad-frequency and high-efficiency electromagnetic shielding, and by adopting sputtering ion coating and sputtering coating, the bonding strengths between film layers and the matrixes and between film layers are high, the process is simple, the quality is stable, the whole process does not relate to chemical solution and harmful gas, the pollution of waste water and waste gas is eliminated, and the production is green and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of a metal matrix composite material, in particular to a preparation process of an electromagnetic shielding composite material. Background technique [0002] With the rapid development of the electronics industry and the increasing number of electronic devices and equipment used in various industries and civilians, electromagnetic signals are flooding the space for human activities. Due to the integration, miniaturization, digitization and light weight of electronic circuits and components, the current used is weak current, and the power of the control signal is close to the power of external electromagnetic wave noise, which may easily cause malfunction, sound and image disturbance, etc. On the other hand, these electronic products themselves also emit electromagnetic waves of different frequencies, which will also cause interference to electronic computers and other communication or electrical equipment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/14C23C14/34C23C14/02
Inventor 牛玉超李海凤苏超
Owner SHANDONG JIANZHU UNIV
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