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A kind of nanometer dual main phase magnet and its preparation method

A dual-main-phase, nanotechnology, applied in the direction of magnetic objects, inductors/transformers/magnets, magnetic materials, etc., can solve problems such as dual-main-phase sintering technology, which is rarely described, to increase consumption, improve utilization, and reduce manufacturing cost effect

Active Publication Date: 2020-12-18
江西永磁磁浮科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents are mainly aimed at micron-scale grains, but there are few descriptions of the dual-primary-phase sintering technology at the nanoscale

Method used

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  • A kind of nanometer dual main phase magnet and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Prepare the main phase A according to the mass percentage: Nd 31.5 (Fe 0.97 Cu 0.03 ) 67.5 B 1.0 and main phase B: (Nd 0.5 Y 0.5 ) 31.5 (Fe 0.97 Cu 0.03 ) 67.5 B 1.0 .

[0026] (2) Put the prepared main phase A and main phase B into the vacuum arc furnace respectively, and vacuumize to 6×10 -3 After Pa, high-purity argon gas was introduced and smelted. In order to ensure the uniformity of the alloy, the smelting was repeated 5 times, and then the alloy ingot was lightly polished to remove the surface oxide scale and then crushed under pressure.

[0027] (3) Put the crushed alloy ingot into the high temperature quartz tube, and place the quartz tube at a distance of 2mm from the water-cooled copper roller, and handle it with a strip at a pressure of -0.06MPa in the furnace at a speed of 26m / s.

[0028] (4) Mix the two types of main phase quick-quenching strips A:B in a ratio of 6:4 and put them into a stainless steel ball mill tank, and at the same time p...

Embodiment 2

[0035] (1) Formulated according to mass percentage (Nd 0.8 Y 0.2 ) 31.5 (Fe 0.97 Cu 0.03 ) 67.5 B 1.0 Raw materials, and sintered magnets were prepared by a single alloy method.

[0036] (2) Put the prepared raw materials into the vacuum arc furnace, and vacuumize to 6×10 -3 After Pa, high-purity argon gas was introduced and smelted. In order to ensure the uniformity of the alloy, the smelting was repeated 5 times, and then the alloy ingot was lightly polished to remove the surface oxide scale and then crushed under pressure.

[0037] (3) Put the crushed alloy ingot into the high temperature quartz tube, and place the quartz tube at a distance of 2mm from the water-cooled copper roller, and handle it with a strip at a pressure of -0.06MPa in the furnace at a speed of 26m / s.

[0038] (4) Put the quick-quenched thin strip into a stainless steel ball mill tank, and put stainless steel balls (8mm in diameter) and an appropriate amount of absolute ethanol at a ball-to-materi...

Embodiment 3

[0043] (1) Prepare the main phase A according to the mass percentage: Nd 31.5 (Fe 0.97 Cu 0.03 ) 67.5 B 1.0 and main phase B: (Nd 0.5 Y 0.5 ) 31.5 (Fe 0.97 Cu 0.03 ) 67.5 B 1.0 .

[0044] (2) Put the prepared main phase A and main phase B into the vacuum arc furnace respectively, and vacuumize to 6×10 -3 After Pa, high-purity argon gas was introduced and smelted. In order to ensure the uniformity of the alloy, the smelting was repeated 5 times, and then the alloy ingot was lightly polished to remove the surface oxide scale and then crushed under pressure.

[0045] (3) Put the crushed alloy ingot into the high temperature quartz tube, and place the quartz tube at a distance of 2mm from the water-cooled copper roller, and handle it with a strip at a pressure of -0.06MPa in the furnace at a speed of 26m / s.

[0046] (4) Mix the two types of main phase quick-quenching strips A:B in a ratio of 6:4 and put them into a stainless steel ball mill tank, and at the same time p...

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Abstract

The invention relates to a nano double main phase magnet and a preparation method thereof, and belongs to the technical field of rare earth permanent magnet materials. The chemical mass percentage corresponding to a permanent magnet alloy is (Nd1-xREx)a(Fe1-yMy)100-a-b Bb, wherein 0<x<=0.65, 0<=y<=0.2, 26<=a<=34 and 0.8<=b<=1.2, RE is one of high-abundance rare earths La, Ce, Y, and M is one or more of Zn, Ga, Co, Cu, Al, Nb, Sn and Mn. The nano double main phase is Nd2Fe14B with high magnetocrystalline anisotropy field anisotropy and low-cost (Nd, RE) 2Fe14B respectively, and the magnet obtained by mixing the two not only reduces the manufacturing cost, but also maintains good magnetic properties.

Description

technical field [0001] The invention belongs to the technical field of rare earth permanent magnet materials, and in particular relates to a nanometer dual main phase magnet and a preparation method thereof. Background technique [0002] Nd-Fe-B permanent magnets are called "Magnetic King" due to their excellent magnetic properties, and are widely used in aerospace, wind power generation, energy-saving home appliances, electronic appliances, and new energy vehicles. And with the continuous improvement of manufacturing technology and the improvement of people's awareness of environmental protection, it has attracted the attention of the market in the three major fields of energy conservation and environmental protection, new energy, and new energy vehicles, and has become a key material for the realization of the "Made in China 2025" development plan. The rapid growth rate of 10~20% shows a good prospect. [0003] The rapid increase in the use of Nd-Fe-B permanent magnet mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0266
Inventor 杨牧南卢耀军杨斌钟淑伟喻玺王亮亮游峰
Owner 江西永磁磁浮科技有限责任公司