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Composite permanent-magnetic material of motor and preparation method of composite permanent-magnetic material

A composite permanent magnet material and raw material technology, applied in the direction of inorganic material magnetism, magnetic circuit characterized by magnetic materials, etc., can solve the problems of rare earth permanent magnet material price rise, user cost increase, benign development impact, etc., and achieve improvement Remanence and Curie temperature, effects of raising Curie temperature and high anisotropy field

Active Publication Date: 2017-02-15
慈溪市华夏电器实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the advancement of science and technology and the continuous improvement of people's requirements for automation equipment and products, the demand for rare earth permanent magnets with high magnetic energy products is increasing. However, the price of rare earths, especially the price of neodymium metal, continues to rise, resulting in The price of rare earth permanent magnet materials represented by NdFeB magnetic materials has also risen sharply, resulting in a significant increase in user costs and a great impact on the healthy development of the entire market, and its poor stability has restricted many Development of motor or permanent magnet industry

Method used

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  • Composite permanent-magnetic material of motor and preparation method of composite permanent-magnetic material

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preparation example Construction

[0021] A method for preparing a composite permanent magnet material for a motor, comprising the steps of:

[0022] (a) Preparation of rare earth permanent magnet ingots: mix Eu, Gd, Fe, Al, P according to the proportioning ratio, mix the weighed raw materials and put them in an intermediate frequency vacuum induction melting furnace for melting to obtain rare earth permanent magnet ingots, wherein, During the smelting process, the heat treatment temperature is 1050°C-1100°C, and the sintering time is 4-6 hours;

[0023] (b) Crushing and pulverizing: the rare earth permanent magnet ingot is first broken into alloy powders with a size of 6 mm by hydrogen cracking, then placed in a reaction vessel to evacuate, and helium gas is introduced to keep the helium pressure at 2 MPa. The jet mill pulverizes the alloy into rare earth magnetic powder with an average particle size of 5-10 μm;

[0024] (c) Preparation of mixed powder: Fe 2 o 3 , Fe 3 o 4 , TiC is mixed according to the ...

Embodiment 1

[0035] A kind of motor composite permanent magnet material, its raw material comprises Eu-Gd-Fe-Al-P-M system, wherein M is made of Fe 2 o 3 , Fe 3 o 4 , TiC and SiN nanoparticles mixed, its particle size range is 20nm, Fe 2 o 3 , Fe 3 o 4 , The mass ratio of TiC and SiN is 10:5:2:1. The mass ratio of Eu, Gd, Fe, Al, P, and M in the system is 5:5:60:2:1:5.

[0036] The preparation method of the motor composite permanent magnet material comprises the steps of:

[0037] 1) Preparation of rare earth permanent magnet ingots: mix Eu, Gd, Fe, Al, and P according to the ratio, mix the weighed raw materials and place them in an intermediate frequency vacuum induction melting furnace for melting to obtain rare earth permanent magnet ingots, wherein the smelting In the process, the heat treatment temperature is 1050°C, and the sintering time is 4 hours;

[0038] 2) Crushing and pulverizing: the rare earth permanent magnet ingot is first crushed into alloy powders with a size of...

Embodiment 2

[0045] A kind of motor composite permanent magnet material, its raw material comprises Eu-Gd-Fe-Al-P-M system, wherein M is made of Fe 2 o 3 , Fe 3 o 4 , TiC and SiN nanoparticles mixed, its particle size range is 25nm, Fe 2 o 3 , Fe 3 o 4 , The mass ratio of TiC and SiN is 10:5:2:1. The mass ratio of Eu, Gd, Fe, Al, P, and M in the system is 6:5:65:3:2:6.

[0046] The preparation method of the motor composite permanent magnet material comprises the following steps:

[0047] 1) Preparation of rare earth permanent magnet ingots: Mix Eu, Gd, Fe, Al, and P according to the proportion, mix the weighed raw materials and put them in an intermediate frequency vacuum induction melting furnace for melting to obtain rare earth permanent magnet ingots. During the melting process , the heat treatment temperature is 1060°C, and the sintering time is 5 hours;

[0048] 2) Crushing and pulverizing: the rare earth permanent magnet ingot is first crushed into alloy powders with a size ...

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Abstract

The invention provides a composite permanent-magnetic material of a motor and a preparation method of the composite permanent-magnetic material. The composite permanent-magnetic material of the motor is formed by a system of Eu, Gd, Fe, Al, P and M, wherein the M is formed by mixing nanoparticles of Fe2O3, Fe3O4, TiC and SiN; the mass ratio of Eu to Gd to Fe to Al to P to M in the system is (5-7) to (5-7) to (60-70) to (2-3) to (1-2) to (5-7); and the mass ratio of the Fe2O3 to the Fe3O4 to the TiC to the SiN in the M is 10 to 5 to 2 to 1. Therefore, the residual magnetism and the magnetic energy product are kept while the coercive force and the high-temperature stability of the permanent-magnetic material are improved, and the cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of permanent magnet materials, in particular to a composite permanent magnet material suitable for motors and a preparation method thereof. Background technique [0002] Permanent magnets are widely used in computer hardware drive equipment, various household appliances, electroacoustic equipment, multimedia equipment, electronic instruments, meters, medical equipment, industrial motors, wind turbines, and automotive sensors, electric vehicles and hybrid vehicles. Motors, etc., have become an important functional material indispensable to the development of modern industry and social economy. [0003] Rare earth permanent magnet materials are newly developed permanent magnet materials with the best performance in the 1980s, and are widely used in motor manufacturing. Compared with traditional permanent magnet material motors, rare earth permanent magnet material motors have the advantages of high efficiency...

Claims

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Application Information

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IPC IPC(8): H01F1/09H02K1/02
CPCH01F1/09H02K1/02
Inventor 柴成华
Owner 慈溪市华夏电器实业有限公司
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