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Rare earth permanent magnet material and preparation method and application thereof

A rare earth permanent magnet and rare earth element technology, used in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of low magnetic rate and poor magnetization characteristics, and achieve excellent magnetic performance and high coercivity. , the effect of large average particle size

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

Experimental program
Comparison scheme
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Embodiment 11～13 and comparative example 1～2

[0067] The raw material components and contents of rare earth permanent magnet materials in Examples 1.1-1.3 and Comparative Examples 1-2 are shown in Table 1 below, wherein Dy is added during grain boundary diffusion treatment.

[0068] Table 1

[0069]

[0070] The preparation method of rare earth permanent magnet material in embodiment 1.1~1.3 and comparative example 1~2 comprises the following steps:

[0071] (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.

[0072] (2) Milling: carry out hydrogen crushing coarse crushing to the alloy flakes in the step (1), and then use jet mill to carry out fine crushin...

Embodiment 2

[0082] The raw material components and contents of rare earth permanent magnet materials in Examples 2.1-2.3 are shown in Table 3 below, wherein Dy is added during grain boundary diffusion treatment.

[0083] table 3

[0084]

[0085] 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.

[0086] Table 4

[0087]

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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 area of single domain crystal grains in the rare earth permanent magnet material accounts for 0.1%-5.5% of the total area. According to the rare earth permanent magnet material, the average grain size of main phase grains is large, the magnetic performance is excellent, and the magnetization characteristic of the rare earth permanent magnet material can be improved while high coercive force is guaranteed; when the effective magnetizing field of the rare earth permanent magnet material is 600kA / m, the magnetic susceptibility of the rare earth permanent magnet material can reach 81% or above; when the effective magnetizing field is 950 kA / m, the magnetic susceptibility can reach 96% 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): H01F1/053H01F1/055H01F41/02
CPCH01F1/0536H01F1/0556H01F1/0557H01F41/0253H01F41/0266H01F41/0293
Inventor 廖宗博张艳艳蓝琴黄佳莹
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD