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Method for preparing high performance permanent magnet particles

A high-performance, granular technology, applied in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the collapse of the hysteresis curve, affect the remanence and magnetic energy product of SmCo dual-phase composite materials, and the preparation process is complicated and other problems, to achieve the effect of excellent magnetic performance

Inactive Publication Date: 2019-04-05
王顺良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process is more complex
[0005] In the prior art, SmCo has been prepared by sonochemical method 5 / FeCo dual-phase composites, but the soft magnetic phase size is in the range of 20-50nm, resulting in SmCo 5 The / FeCo hysteresis curve is severely collapsed, which affects the SmCo 5 Improvement of remanence and energy product of / FeCo dual-phase composites
It is difficult to realize the simultaneous control of the nanonization of deposited particles and the continuity of the deposited film with the current packaging methods, and it is more challenging to control the soft magnetic phase particles to about 10nm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The hard magnetic part of the permanent magnetic particle of the present embodiment is by general formula by following composition: Sm(Co 0.97 Ti 0.03 ) 4.8 Si 0.2 .

[0021] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 50kPa; heat up to 1300°C to melt, stir, refine and cast into water-cooled copper molds for use.

[0022] The obtained alloy ingot is crushed, put into the quartz tube in the vacuum belt throwing machine, the diameter of the nozzle at the bottom of the quartz tube is 0.5 mm, after the chamber of the vacuum belt throwing machine is evacuated, the cavity is filled with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance between the nozzle at the bottom of th...

Embodiment 2

[0025] The hard magnetic part of the permanent magnetic particle of the present embodiment is by general formula by following composition: Sm(Co 0.9 Ti 0.1 ) 4.5 Si 0.5 .

[0026] According to the above general formula, each element is weighed for batching; the batching is placed in the melting furnace, and the vacuum in the furnace reaches at least 5×10 -3 Pa; Then, pass helium gas until the pressure in the furnace is 80kPa; heat up to 1450°C to melt, stir, refine, and then cast it into a water-cooled copper mold for use.

[0027] The obtained alloy ingot is crushed and put into the quartz tube in the vacuum strip machine. The diameter of the nozzle at the bottom of the quartz tube is 0.8mm. After the cavity of the vacuum strip machine is vacuumed, fill the cavity with protective gas; Turn on the power supply of the vacuum strip machine to heat and melt the alloy in the quartz tube. At the same time, control the distance from the nozzle at the bottom end of the quartz tub...

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PUM

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Abstract

The invention discloses a method for preparing high performance permanent magnet particles. The ingredients of an SmCo5 alloy is adjusted by using doping so as to obtain a large alloy composition supercooling degree, and anisotropic SmCo5 with fine grain size is obtained; the surfaces of hard magnetic particles are pretreated by using an acid liquor so as to remove an oxidation layer, heterogeneous nucleation is carried out on soft magnetism phases on the surfaces of the hard magnetic particles, and the soft magnetism phases are continuously and tightly arranged on the surfaces of the hard magnetic particles, so that the magnetic performance is excellent.

Description

Technical field [0001] The invention relates to the field of magnetic material manufacture, in particular to a method for high-performance permanent magnet particles. Background technique [0002] Rare earth permanent magnet materials refer to permanent magnet materials made of alloys formed of rare earth metals and transition metals through a certain process. Rare earth permanent magnet material is the permanent magnet material with the highest comprehensive performance known now, which is more than 100 times higher than the magnetic properties of the magnetic steel used in the 90th century, much superior to ferrite and AlNiCo, and more than The magnetic properties of expensive platinum-cobalt alloys are twice as high. Due to the use of rare earth permanent magnet materials, it not only promotes the miniaturization of permanent magnet devices and improves the performance of products, but also promotes the production of some special devices. Therefore, the emergence of rare...

Claims

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Application Information

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IPC IPC(8): H01F1/058H01F41/00
CPCH01F1/058H01F41/00
Inventor 王顺良
Owner 王顺良
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