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Preparation method of Nd-Fe-B magnetic nanowire array

A magnetic nano, nd-fe-b technology, applied in nanotechnology, electroforming nanostructures, electrolytic coatings, etc., can solve the limitations of the application of Nd-Fe-B magnetic thin film materials, high surface requirements for plating properties, and deposition surfaces. Small and other problems, to achieve the effect of large aspect ratio, orderly arrangement and uniform wire diameter

Active Publication Date: 2018-10-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The performance and uniformity of the recording medium film prepared by the above methods are strongly dependent on various factors such as sputtering power, target base distance, gas pressure, background vacuum degree, etc., which have high cost, small deposition area, and high requirements on the surface of the plated parts. Insufficient, which greatly limits the application of Nd-Fe-B magnetic thin film materials

Method used

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  • Preparation method of Nd-Fe-B magnetic nanowire array
  • Preparation method of Nd-Fe-B magnetic nanowire array
  • Preparation method of Nd-Fe-B magnetic nanowire array

Examples

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Embodiment 1

[0045] Step 1: Preparation of AAO template

[0046] In this paper, the AAO template method was used to prepare nanowires. The AAO template is prepared by secondary anodic oxidation in oxalic acid solution by using high-purity aluminum foil with a purity of 99.999% and a thickness of 0.3 mm. It mainly includes several processes of aluminum sheet pretreatment, secondary anodic oxidation, aluminum substrate removal, and hole expansion to remove barrier layer.

[0047] (1) Aluminum sheet pretreatment

[0048] Cutting: Cut the aluminum foil into a small disc with a diameter of 20mm, making it close to the diameter of the gasket used for oxidation.

[0049] Annealing: The aluminum sheet is then annealed in a vacuum tube furnace under the protection of an argon atmosphere. The annealing temperature is 500°C, and the annealing time is set to 5h. After the annealing is completed, it is cooled to room temperature with the furnace.

[0050] Washing: wash the aluminum sheet in acetone ...

Embodiment 2

[0067] Change the concentration of each component in Example 1 to C(NdCl 3 ·6H 2 O)=13.45g / L, C(FeCl 2 4H 2 O)=80g / L, C(H 3 BO 3 )=36g / L, C(C 2 h 5 NO 2 )=30g / L, C(C 6 h 8 o 6 )=1.2g / L, C(NH 4 Cl)=30g / L, other steps are the same

[0068] Example 1.

[0069] In this embodiment, the metal atomic ratio is Nd:Fe:B=2:1:2.9, and the mass ratio is about 11.3:2.7:3.2.

Embodiment 3

[0071] Change the concentration of each component in Example 1 to C(NdCl 3 ·6H 2 O)=16g / L, C(FeCl 2 4H 2 O)=40g / L, C(H 3 BO 3 )=33g / L, C(C 2 h 5 NO 2 )=30g / L, C(C 6 h 8 o 6 )=1.2g / L, C(NH 4 Cl)=30g / L, other steps are the same

[0072] Example 1.

[0073] In this embodiment, the metal atomic ratio is Nd:Fe:B=2:0.22:2.9, and the mass ratio is about 11.3:6.4:3.2.

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Abstract

The invention discloses a preparation method of a Nd-Fe-B magnetic nanowire array. The preparation method comprises the following steps: neodymium chloride (NdCl3.6H2O), ferrous chloride (FeCl2.4H2O),boric acid (H3BO3) and de-ionized water are mixed to prepare NdFeB alloy solution; a complexing agent is added to obtain depositing liquid, wherein the complexing agent is glycine (NH2CH2COOH), ammonium chloride (NH4Cl) and ascorbic acid (C6H8O6); and graphite is used as an anode, an AAO template is used as a cathode, the Nd-Fe-B depositing liquid prepared in the last step is electrolyte, and a direct-current voltage-stabilization power supply is used for electrochemical deposition to finally obtain Nd-Fe-B ternary alloy magnetic nanowires. The obtained nanowires are high in number and deposition rate, arranged in parallel, ordered in height, uniform in diameter and higher in length-diameter ratio.

Description

technical field [0001] The technical scheme of the invention relates to a magnetic material containing rare earth metals and magnetic transition metals, specifically a preparation method for Nd-Fe-B ternary alloy magnetic nanowires. Background technique [0002] With the continuous development of information technology, information storage technology requires ultra-high density and storage speed. The recording density of traditional magnetic recording media is close to the superparamagnetic limit, and the recording speed is limited by the magnetization reversal speed, so the development is slow. Therefore, the pursuit of ultra-high density and ultra-high storage speed recording technology has become the current information technology field. Research hotspots. [0003] The third-generation rare earth permanent magnet material Nd-Fe-B has high remanence, high coercive force and high magnetic energy product unmatched by other materials, so it ranks first in the application and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/00C25D11/12C25D11/24B82Y40/00
CPCB82Y40/00C25D1/006C25D11/045C25D11/12C25D11/24
Inventor 崔春翔康立丛杨薇丁贺伟曹斌
Owner HEBEI UNIV OF TECH
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