Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof

A magnetic shielding material, fe-ni technology, applied in the field of electroplating Fe-Ni alloy magnetic shielding material and its preparation, can solve the problems of reduced shielding efficiency, weak antimagnetic saturation ability, and reduced material magnetic shielding performance, and achieves low residual Magnetization and coercivity, effect of high saturation magnetization

Inactive Publication Date: 2014-07-02
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the low-frequency strong magnetic field, the shielding effect of the material through the eddy current effect is very small, and the anti-magnetic saturation ability of the material with high magnetic permeability is weak. Under the action of a strong magnetic field, the magnetic permeability drops rapidly, resulting in a sharp decrease in shielding effectiveness
On the other hand, ferromagnetic materials with high magnetic permeability are generally obtained by mechanical processing, which will not only reduce the magnetic shielding performance of the material, but also increase energy consumption, increase cost, and reduce cost performance, all of which limit its application.
[0004] Therefore, the traditional single soft magnetic material is difficult to meet the needs of the current development of electromagnetic wave shielding

Method used

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  • Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof
  • Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof
  • Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Plating FeNi 80 Alloy plating, using copper foil (0.3mm thick) substrate.

[0029] The process route is: degreasing - water washing - pickling - water washing - primary zinc dipping solution - water washing - pickling - water washing - secondary zinc dipping - water washing - electroplating FeNi 80 Alloy Plating - Washable. The oil removal in this process route is alkaline oil removal, and 50% HNO is used for pickling 3 solution, the corresponding process conditions are carried out according to the existing process.

[0030] The electroplating solution ratio for electroplating Fe-Ni alloy coating is as follows: nickel sulfate 200g / L, ferrous sulfate 20g / L, sodium chloride 30g / L, boric acid 40g / L, sodium citrate 20g / L, saccharin 3g / L, Sodium benzenesulfinate 0.3g / L, sodium dodecylbenzenesulfonate 0.1g / L. The cathode is copper foil (0.3 mm thick), and the anode is a nickel-iron alloy with a weight ratio of nickel and iron of 6:1. Constant voltage electrodeposition is...

Embodiment 2

[0033] Plating FeNi 50 Alloy plating, copper foil (0.3mm thick) substrate

[0034] Process route: degreasing - water washing - pickling - water washing - primary zinc immersion - water washing - pickling - water washing - secondary zinc immersion - water washing - electroplating Fe-Ni alloy coating - water washing. The oil removal in this process route is alkaline oil removal, and 50% HNO is used for pickling 3 solution, the corresponding process conditions are carried out according to the existing process.

[0035] The electroplating solution proportion of electroplating Fe-Ni alloy coating is as follows: nickel sulfate 60g / L (electroplating FeNi 50 ), ferrous sulfate 20g / L, sodium chloride 30g / L, boric acid 40g / L, sodium citrate 20g / L, saccharin 3g / L, sodium benzenesulfinate 0.3g / L, dodecylbenzenesulfonic acid Sodium 0.1g / L. The cathode is copper foil (0.3 mm thick), and the anode is a nickel-iron alloy with a nickel-iron ratio of 6:1. Using constant voltage electrodepo...

Embodiment 3

[0038] Plating FeNi 50 / FeNi 80 Double-layer alloy coating, aluminum alloy substrate

[0039] Process route: degreasing-water washing-alkali-pickling-water washing-primary zinc dipping solution-water washing-pickling-water washing-secondary zinc dipping-water washing-electroless nickel plating-FeNi electroplating 80 Alloy coating - washing - heat treatment - degreasing - washing - copper plating - FeNi plating 50 Alloy Plating - Washable.

[0040] In the above-mentioned route, lye is caustic alkali, removes the oxide (Al 2 o 3 ). The treatment time should not be too long, otherwise it is easy to dissolve the surface of the aluminum substrate; pickling uses 50% HNO 3 Solution, electroless nickel plating is to put the aluminum alloy substrate into the nickel plating solution at 80 ℃ for 30 minutes, so that the surface is uniformly plated with a layer of nickel. The electroplating solution ratio of the electroplating Fe-Ni alloy coating is as follows: Nickel sulfate 200g / L...

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Abstract

An electroplating Fe-Ni alloy magnetic shielding material and a preparation method thereof. The magnetic shielding material is a composite shielding film material comprising a plurality of Cu thin films or Ni thin films and a plurality of Fe-Ni alloy plating layers, wherein the Fe-Ni alloy plating layers have nickel content of 50%-85%. The magnetic shielding material has high saturation magnetization intensity, and low residual magnetization intensity and coercive force, and has certain magnetic shield performance in a low frequency magnetic field and a static magnetic field. The preparation method comprises the following steps: (1) cleaning the surface of a substrate; (2) depositing the Cu thin films or Ni thin films on the substrate; (3) electroplating the substrate in an electroplating liquid for electroplating the Fe-Ni alloy plating layers; (4) placing the substrate electroplated with the Fe-Ni alloy plating layers in a resistance furnace, fast heating temperature to 300 DEG C, insulating under the protection of hydrogen for 4 h, and finally cooling in hydrogen atmosphere with the furnace to carry out a low temperature annealing treatment; and (5) repeating the steps (2)-(4) to obtain the required Fe-Ni alloy magnetic shielding material.

Description

technical field [0001] The invention relates to an electroplated Fe-Ni alloy magnetic shielding material applied to a low-frequency magnetic field and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, the impact of electromagnetic radiation on the environment and human life is increasing. Therefore, it is of great significance to effectively shield electromagnetic waves and carry out research on broadband electromagnetic wave shielding materials. At present, the high-frequency (> 1MHz) electromagnetic field shielding technology has been mature at home and abroad, but the low-frequency magnetic field shielding has not been well resolved. [0003] Iron-based high-permeability soft magnetic materials, such as pure iron, silicon steel sheets, permalloy, and nanocrystals, are currently the most widely used magnetic field shielding materials. However, in the low-frequency strong magnetic field, the shieldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56C25D5/14
Inventor 刘坤马书旺杨剑梁秋实毛昌辉杜军
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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