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Method for preparing nanoscale high-performance composite magnet material

A composite magnet and high-performance technology, applied in the direction of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., to achieve high magnetic energy product, rapid cooling, and suppress structural deformation

Pending Publication Date: 2021-11-02
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few studies on high-performance composite nanocrystalline magnetic materials. Therefore, it is necessary to provide a preparation method for high-performance composite nanocrystalline magnetic materials.

Method used

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  • Method for preparing nanoscale high-performance composite magnet material

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Embodiment 1

[0026] A method for preparing a nanoscale composite magnet material by a liquid-phase laser ablation method, comprising the following steps:

[0027] (1) Batching stage: the atomic number ratio is Nd: Dy: Fe: Nb: Co: B = 9: 0.4: 80.24: 0.36: 3: 6, convert the atomic number ratio into a mass ratio, and then weigh the metal Powder materials Nd, Dy, Tb, In, Fe, Co, FeB (the mass fraction of B in FeB is 19.83%) and NbFe (the mass fraction of Nb in NbFe is 66.3%), and then add FeCrCo produced by induction melting or other melting methods After the alloy powder (Cr 24.7w%, Co 12.9wt%, Si 1.1wt%, and the rest is Fe) powder is fully ground and mixed, the raw material powder is pressed under a pressure of 15Mpa to a length of 15mm, a width of 15mm, and a thickness of 4mm. Piece;

[0028] In this embodiment, the FeCrCo alloy powder is produced by induction melting, which is a conventional method in the prior art, which is not improved in the present invention. In this embodiment, the ...

Embodiment 2

[0034] A method for preparing a nanoscale composite magnet material by a liquid-phase laser ablation method, comprising the following steps:

[0035] (1) Batching stage: the atomic number ratio is Nd: Dy: Fe: Nb: Co: B = 9: 0.4: 80.24: 0.36: 3: 6, convert the atomic number ratio into a mass ratio, and then weigh the metal Powder materials Nd, Dy, Tb, In, Fe, Co, FeB (the mass fraction of B in FeB is 19.83%) and NbFe (the mass fraction of Nb in NbFe is 66.3%), and then add FeCrCo produced by induction melting or other melting methods After the alloy powder (Cr 24.7w%, Co 12.9wt%, Si 1.1wt%, and the rest is Fe) powder is fully ground and mixed, the raw material powder is pressed under a pressure of 15Mpa to grow into a 20mm, 12mm wide, 5mm high block ;

[0036] (2) Pre-burning stage: the pressed blocks are heated at 1200 o C pre-burned for 1h to form a precursor;

[0037] (3) Ablation stage: the temperature of the precursor drops to 20 o C, use ultrasonic cleaner (such as ch...

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Abstract

The invention discloses a method for preparing a nanoscale high-performance composite magnet material. The method comprises the following steps: weighing raw materials according to a certain stoichiometric ratio, grinding and mixing, and pressing powder into blocks; presintering the pressed blocks under a certain temperature condition to form a precursor; cleaning and drying the precursor, putting the precursor as a target on a target bracket of a beaker, filling an isopropyl-ketone solution to submerge the precursor by 5-10 mm, putting the beaker on a rotating platform, and focusing a laser pulse beam on the surface of the precursor by adopting third harmonic of an Nd: YAG laser as an ablation laser light source to ablate so as to generate a mixed solution containing nanoscale particle precipitates; and filtering the precipitate of the mixed solution, and repeatedly cleaning and drying to obtain the nanoscale high-performance composite permanent magnet material. According to the method, the preparation process is simple, the prepared composite nanocrystalline permanent magnet is clean in surface and good in chemical activity, meanwhile, structural deformity is effectively inhibited, and the magnetic performance of the nanocrystalline magnet is improved.

Description

technical field [0001] The invention specifically relates to a method for preparing a nanoscale high-performance composite magnet material. Background technique [0002] Composite nanocrystalline magnetic material is a new type of dual-phase permanent magnetic material developed in recent years. It is composed of a hard magnetic phase with high magnetocrystalline anisotropy and a soft magnetic phase with high saturation magnetization on the nanometer scale to produce a strong magnetic exchange coupling effect, so that the magnet shows an obvious remanence enhancement effect (Mr / Ms>0.5) . At present, there are few studies on high-performance composite nanocrystalline magnetic materials. Therefore, it is necessary to provide a preparation method for high-performance composite nanocrystalline magnetic materials. Contents of the invention [0003] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057H01F1/055
CPCH01F41/0266H01F1/0579H01F1/0576H01F1/0577H01F1/0551H01F1/0556H01F1/0557H01F1/0045
Inventor 杨杭福吴琼葛洪良
Owner CHINA JILIANG UNIV
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