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A kind of preparation method of samarium iron nitrogen magnetic nanotube

A magnetic nano, samarium iron nitrogen technology, applied in the field of material preparation, can solve the problem that Sm-Fe-N magnets are difficult to meet high-end needs, and achieve the effect of excellent magnetic anisotropy

Active Publication Date: 2020-09-15
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Sm-Fe-N magnets prepared by the current technology are difficult to meet the high-end needs, so there is an urgent need to develop Sm-Fe-N magnetic nanomaterials with high magnetic energy product and excellent magnetic anisotropy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] 2) Preparation of samarium-iron nanotubes: prepare samarium-iron nanotubes by pulse electrodeposition in a magnetic field: prepare the alumina template as the working electrode in the first step, the mercury electrode as the counter electrode, and the Ag / AgCl electrode as the auxiliary electrode , After adding the deposition solution, pulse electrodeposition is carried out under stirring at 30~50℃. After the deposition is completed, the porous alumina template is dissolved with 2 mol / L NaOH solution, and then washed with ethanol and distilled water to neutral;

[0019] The direction of the magnetic field is perpendicular to the growth direction of the nanotubes, and the size of the magnetic field is 1 to 5 T;

[0020] The solute of the sedimentation liquid is: SmCl 3 • 6H 2 O, FeCl 2 • 4H 2 O, Na 3 C 6 H 5 O 7 • 2H 2 O, NaCl, H 3 BO 3 And ascorbic acid, the solvent is 2:1 water and ethylene glycol solution;

[0021] The conditions of the pulse electrodeposition are: the curren...

Embodiment 1

[0026] The steps are:

[0027] 1) Preparation of porous alumina template: select an alumina template with a pore size of 200nm double-pass, magnetron sputter a gold film with a thickness of 1 μm on its back, and then pass through methyldimethoxysilane, ethanol, and distilled water in turn Dry after ultrasonic cleaning for standby;

[0028] 2) Preparation of samarium-iron nanotubes: prepare samarium-iron nanotubes by pulse electrodeposition in a magnetic field: prepare the alumina template as the working electrode in the first step, the mercury electrode as the counter electrode, and the Ag / AgCl electrode as the auxiliary electrode , After adding the deposition solution, pulse electrodeposition is carried out under stirring at 50℃. After the deposition is completed, the porous alumina template is dissolved with 2 mol / L NaOH solution, and then washed with ethanol and distilled water to neutral;

[0029] The direction of the magnetic field is perpendicular to the growth direction of th...

Embodiment 2

[0037] The steps are:

[0038] 1) Preparation of porous alumina template: select an alumina template with a pore size of 200nm double-pass, magnetron sputter a gold film with a thickness of 1 μm on its back, and then pass through methyldimethoxysilane, ethanol, and distilled water in turn Dry after ultrasonic cleaning for standby;

[0039] 2) Preparation of samarium-iron nanotubes: prepare samarium-iron nanotubes by pulse electrodeposition in a magnetic field: prepare the alumina template as the working electrode in the first step, the mercury electrode as the counter electrode, and the Ag / AgCl electrode as the auxiliary electrode After adding the deposition solution, pulse electrodeposition is carried out under stirring at 30°C. After the deposition is completed, the porous alumina template is dissolved with a 2 mol / L NaOH solution, and then washed with ethanol and distilled water to neutral;

[0040] The direction of the magnetic field is perpendicular to the growth direction of t...

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Abstract

The invention relates to a preparation method of a samarium-iron-nitrogen magnetic nanotube, and the method comprises the following steps: taking porous aluminum oxide as a template and preparing a samarium-iron nanotube array by through adopting a pulse electrodeposition method under a vertical magnetic field; putting the samarium-iron nanotube array into a heat treatment furnace, and carrying out nitriding orientation, annealing hydrogenation and nitridation to obtain the samarium-iron-nitrogen magnetic nanotube array. The samarium-iron-nitrogen magnetic nanotube array obtained by the method is a highly-ordered nanotube array, and the outer diameter of nanotube is consistent with the aperture of a porous alumina template; the samarium-iron-nitrogen magnetic nano array has excellent magnetic performances and magnetic anisotropy.

Description

Technical field [0001] The invention relates to a preparation method of a samarium-iron-nitrogen magnetic nanotube and belongs to the field of material preparation. Background technique [0002] Permanent magnetic materials are materials that have large remanence, coercivity, magnetic energy product, and can maintain constant magnetic properties once they are magnetized. The permanent magnet material has undergone carbon steel-aluminum nickel cobalt-ferrite-SmCo 5 -Sm 2 Co 17 -Nd 2 Fe 14 B. Several major stages of development. Among them, rare earth permanent magnet materials are new types of permanent magnet materials developed in the 1960s, including the first generation rare earth permanent magnet 1:5 type SmCo alloy, the second generation rare earth permanent magnet 2:17 type SmCo alloy; the first and second generation The second-generation rare-earth permanent magnet materials all contain the rare-earth element Co, and Co is a strategic material and expensive, which to a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/059H01F1/00H01F41/02C25D3/56C23C8/24C25D5/18B82Y25/00B82Y40/00B82Y30/00
CPCB82Y25/00B82Y30/00B82Y40/00C23C8/24C25D3/56C25D5/18H01F1/009H01F1/059H01F41/0253
Inventor 徐靖才洪波王新庆彭晓领金红晓金顶峰葛洪良
Owner CHINA JILIANG UNIV