Method for preparing nanoscale high-performance Nd2Fe14B/MnBi composite magnet material

A nd2fe14b, composite magnet technology, applied in the direction of magnetic materials, magnetic objects, inductance/transformer/magnet manufacturing, etc., to achieve the effect of suppressing structural deformities, high surface, and high magnetic energy product

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, i

Method used

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  • Method for preparing nanoscale high-performance Nd2Fe14B/MnBi composite magnet material
  • Method for preparing nanoscale high-performance Nd2Fe14B/MnBi 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 comprises 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 the finished MnBi (atoms of Mn and Bi The number ratio is 54:46) After the powder is fully ground and mixed, the raw material powder is pressed into a block with a length of 15mm, a width of 15mm, and a thickness of 4mm under a pressure of 15Mpa;

[0028] (2) Pre-burning stage: the pressed block is heated at 1050 o C pre-burned for 4 hours to form a precursor;

[0029] (3) Ablation stage: the temperature of the precursor is lowered to room temperature, and the precursor is cleaned with an ultrasonic cleaning ...

Embodiment 2

[0033] A method for preparing a nanoscale composite magnet material by a liquid-phase laser ablation method comprises the following steps:

[0034] (1) Dosing stage: atomic ratio: Nd: Dy: Fe: Nb: Co: B=9: 0.4: 80.24: 0.36: 3: 6, convert the atomic number ratio into mass ratio, and then weigh the metal powder material 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 the finished MnBi (the atomic number ratio of Mn and Bi 54:46) After the powder is fully ground and mixed, the raw material powder is pressed into a block with a length of 12mm, a width of 15mm, and a thickness of 6mm under a pressure of 15Mpa;

[0035] (2) Pre-burning stage: the pressed block is heated at 1050 o C pre-burned for 4 hours to form a precursor;

[0036] (3) Ablation stage: the temperature of the precursor is lowered to room temperature, and the precursor is cleaned with an ultrasonic cleaning agent for 30 minutes, ...

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Abstract

The invention discloses a method for preparing a nanoscale high-performance Nd2Fe14B/MnBi 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 block under a certain temperature condition to form a precursor; cleaning and drying a 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 a nanoscale particle precipitate; and filtering the precipitate of the mixed solution, and repeatedly cleaning and drying to obtain the nanoscale high-performance composite permanent magnet material. 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 nanoscale high-performance Nd 2 Fe 14 The method of B / MnBi 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...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/059H01F1/057
CPCH01F41/0266H01F1/0579H01F1/0576H01F1/0577H01F1/059H01F1/0045
Inventor 吴琼杨杭福葛洪良
Owner CHINA JILIANG UNIV
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