Nitrogen-containing permanent magnet material and preparation method

A technology of permanent magnet materials and permanent magnets, applied in magnetic materials, magnetic objects, inorganic materials, etc., can solve the problem of low magnetic induction intensity, achieve the effects of improved magnetic performance, flexible composition ratio, and improved environment

Active Publication Date: 2019-02-15
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the residual magnetic induction intensity is not high

Method used

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  • Nitrogen-containing permanent magnet material and preparation method

Examples

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Effect test

Embodiment 1

[0037] The preparation method of nitrogen-containing permanent magnet material of the present invention, concrete steps are as follows:

[0038] 1) Waste treatment: first place the polishing powder waste in a roasting furnace for pretreatment, pretreatment temperature is 650°C, and keep warm for 2 hours; then add the pretreatment polishing waste to 95°C and 10 mol / L hydrochloric acid for leaching, The mass ratio of pretreatment polishing waste to hydrochloric acid is 1:3, and the leaching time is 4 hours; after that, the precipitate is washed 5 times with water, dried at 120°C for 1 hour, then kept at 1100°C for 1.5 hours, and obtained after cooling Precipitated rare earth oxide A;

[0039] NdFeB waste with a mass concentration of 10% Na 2 CO 3 After the solution is degreased, the treated waste is obtained, and the sulfuric acid solution with a concentration of 10mol / L is added to dissolve in a mass ratio of 1: 1 with the waste, and the acid insoluble matter is filtered off,...

Embodiment 2

[0048] The preparation method of nitrogen-containing permanent magnet material of the present invention, concrete steps are as follows:

[0049] 1) Waste treatment: first place the polishing powder waste in a roasting furnace for pretreatment at a temperature of 550°C and keep it warm for 1 hour; then add the pretreated polishing waste to 8mol / L hydrochloric acid at 90°C for leaching and pretreatment The mass ratio of polishing waste to hydrochloric acid is 1:2, and the leaching time is 2 hours; after that, the precipitate is washed 3 times to collect the precipitate, dried at 120°C for 1 hour, and then kept at 1050°C for 1 hour, and the precipitated rare earth is obtained after cooling Oxide A;

[0050] 2) NdFeB waste with a mass concentration of 10% Na 2 CO 3 After the solution is degreased to obtain the treated waste, add 10mol / L sulfuric acid solution to dissolve at a mass ratio of 1: 1 to the waste, filter out the acid insoluble matter, and keep the filtrate; prepare 12...

Embodiment 3

[0059] In this example, the rare earth permanent magnet material alloy ingot prepared by waste recycling is batched according to the following mass percentages:

[0060] Nd 24%, Ce 4.8%, La 7.2%, Tm 0.24%, B 5%, Ti 0.165%, Sn 0.24%, Ta 0.24%, and the rest is Fe. The rest of the preparation process and conditions are the same as in Example 1, and the mass percentage of N in the material is 1.65%.

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Abstract

The invention provides a nitrogen-containing permanent magnet material and a preparation method therefor. The nitrogen-containing permanent magnet material has relatively high residual magnetic flux density. The preparation method is simple in process, low in production cost, and suitable for realizing industrial production. The permanent magnet material comprises the following components based on mass percentage: 22-25% of Nd, 4.4-5.0% of Ce, 6.6-7.5% of La, 0.22-0.25% of Tm, 3-6% of B, 1.5-1.8% of N, 0.15-0.18% of Ti, 0.22-0.25% of Sn, 0.22-0.25% of Ta and the balance of Fe; and the 1.5-1.8% of N based on mass percentage is included in the material.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a nitrogen-containing permanent magnet material and a preparation method. Background technique [0002] CN201310688864.2 application provides a rare earth permanent magnet and its manufacturing method. The ratio of the area of ​​the surface perpendicular to the orientation direction on the rare earth permanent magnet to the area of ​​other surfaces except the surface perpendicular to the orientation direction is greater than or equal to 0.5, and the magnet is diffused with at least one of dysprosium, terbium or holmium kind of element. By using the manufacturing method, the magnet can obtain high coercive force and ideal demagnetization curve squareness without affecting the corrosion resistance of the magnet. But the residual magnetic induction intensity is not high. Contents of the invention [0003] Aiming at the above-mentioned technical defects, the present invention provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/059H01F1/08C22C38/14C25C3/34C22C33/02
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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