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Rare earth permanent magnet material and preparation method and application thereof

A technology of rare earth permanent magnets and rare earth elements, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., can solve problems such as poor magnetization characteristics and low magnetic concentration, and achieve high coercive force and magnetic properties Excellent, the effect of improving the magnetization characteristics

Pending Publication Date: 2022-05-03
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of low magnetization rate of rare earth permanent magnet materials in the prior art, especially the problem of poor magnetization characteristics under low magnetization magnetic field, the present invention provides a rare earth permanent magnet material and its preparation method and application

Method used

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  • Rare earth permanent magnet material and preparation method and application thereof
  • Rare earth permanent magnet material and preparation method and application thereof
  • Rare earth permanent magnet material and preparation method and application thereof

Examples

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Embodiment 11～14 and comparative example 1～2

[0076] The components and contents of the raw material compositions of rare earth permanent magnet materials in Examples 1.1-1.4 and Comparative Examples 1-2 are shown in Table 1 below, wherein Dy is added during grain boundary diffusion treatment.

[0077] Table 1

[0078]

[0079] The preparation method of rare earth permanent magnet material in embodiment 1.1~1.4 and comparative example 1~2 comprises the following steps:

[0080] (1) Melting: according to the formula shown in Table 1, take the prepared raw materials and put them into a vacuum belt furnace, and heat them at 1 × 10 -2 Melting is carried out under the vacuum condition of Pa and the temperature of 1500°C, and the molten liquid is obtained after complete melting; at 5.5×10 4 Under the Ar atmosphere of Pa, take 10 2 ℃ / sec-10 4 ℃ / sec speed cooling, pouring into alloy fling strips.

[0081](2) Milling: carry out hydrogen crushing coarse crushing to the alloy flakes in the step (1), and then use jet mill to c...

Embodiment 2

[0091] The components and contents of the raw material compositions of rare earth permanent magnet materials in Examples 2.1-2.3 are shown in Table 3 below, wherein Dy is added during the grain boundary diffusion treatment.

[0092] table 3

[0093]

[0094] In the step (2) of the preparation method of the rare earth permanent magnet material in Examples 2.1-2.3, after jet milling, the median diameter D50 of the fine alloy powder is shown in Table 4, and the others are the same as in Examples 1.1-1.4.

[0095] Table 4

[0096] Example 2.1 Example 2.2 Example 2.3 Median particle size D50(μm) 6.5 7.3 6.9

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Abstract

The invention discloses a rare earth permanent magnet material and a preparation method and application thereof. The average grain size of main phase grains of the rare earth permanent magnet material is 5-10 microns; the particle size distribution proportion of the rare earth permanent magnet material main phase grains accords with the curve distribution rule. The average grain size of main phase grains of the rare earth permanent magnet material is large, and the magnetization characteristic of the rare earth permanent magnet material can be improved while high coercive force can be guaranteed; when an external magnetic field of the rare earth permanent magnet material is larger than 20kOe, the magnetic susceptibility of the rare earth permanent magnet material can reach 95% or above; after the magnetic susceptibility reaches 93% or above, the curve slope of the external magnetic field and the magnetic susceptibility is large, the magnetic susceptibility growth rate is high, and a step-shaped curve can be eliminated; and the thermal demagnetization rate at 120 DEG C can reach 98% or above.

Description

technical field [0001] The invention relates to a rare earth permanent magnet material and a preparation method and application thereof. Background technique [0002] Rare earth permanent magnet materials are widely used in electronic products, automobiles, wind power, home appliances, elevators and industrial robots because of their excellent magnetic properties, such as permanent magnets in hard disks, mobile phones, earphones, and elevator traction machines and generators. Motor as an energy source, etc. With the increasing demand, higher requirements are placed on the magnetic properties and magnetization characteristics of rare earth permanent magnet materials. Generally, when the rare earth permanent magnet material has high magnetic properties, it is difficult to achieve saturation magnetization. Therefore, it is necessary to provide a rare earth permanent magnet material whose magnetic properties and magnetization characteristics can meet the requirements at the sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/06H01F1/08H01F41/02
CPCH01F1/06H01F1/08H01F41/0253H01F41/0266H01F41/0293
Inventor 张艳艳蓝琴廖宗博黄佳莹
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD