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
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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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