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Multi-rare earth phase permanent magnet material and preparation method

A permanent magnet material and rare earth technology, applied in the direction of magnetic materials, inorganic material magnetism, metal material coating technology, etc., can solve the problem of insufficient magnetic energy product, achieve the effect of improving the environment, high social value, and improving corrosion resistance

Active Publication Date: 2018-01-12
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the energy product of the material is not high enough

Method used

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  • Multi-rare earth phase permanent magnet material and preparation method
  • Multi-rare earth phase permanent magnet material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of multi-rare earth phase permanent magnet material of the present invention, the method comprises the steps:

[0038] 1) Waste disposal:

[0039] a) Take NdFeB permanent magnet waste with a mass fraction of 15% Na 2 CO 3 solution to remove oil from waste, Na 2 CO 3 The mass ratio of waste to waste is 0.03:1. After the treated waste is filtered and washed 3 times, it is dried in an oven at 125°C for 2 hours to obtain deoiled waste; then the deoiled waste is placed in a concentration of 30% In the concentrated sulfuric acid, the mass ratio of oil-removing waste material and concentrated sulfuric acid is 1: 1.2, after soaking for 3 hours, it is filtered, and washed 3 times with tap water, the filter residue is discarded, and the filtrate and washing liquid are combined; the above-mentioned combined feed liquid is placed in In the stirred reactor, stir at 200°C for 2 hours, then evenly add sodium sulfate and stir for 2 hours to form a double sal...

Embodiment 2

[0050] The preparation method of multi-rare earth phase permanent magnet material of the present invention, the method comprises the steps:

[0051] 1) Waste disposal:

[0052] a) Take NdFeB permanent magnet waste with a mass fraction of 10% Na 2 CO 3 solution to remove oil from waste, Na 2 CO 3 The mass ratio of waste to waste is 0.02:1. After the treated waste is filtered and washed 3 times, it is dried in an oven at 120°C for 1 hour to obtain deoiled waste; then the deoiled waste is placed in a concentration of 25% In the concentrated sulfuric acid, the mass ratio of oil-removing waste material and concentrated sulfuric acid is 1: 1.0, it is filtered after soaking for 2 hours, and washed 3 times with tap water, the filter residue is discarded, and the filtrate and washing liquid are combined; the above-mentioned combined feed liquid is placed in In the stirred reactor, stir at 150°C for 1 hour, then add sodium sulfate evenly and stir for 1-2 hours to form a double salt...

Embodiment 3

[0063] In this example, the preparation of multi-rare earth phase permanent magnet material alloy ingots: batching is carried out according to the following mass percentages: Nd 18%, Y 3.6%, La 5.4%, Ce 7.2%, Pr3.6%, Pd 0.18%, Sm 0.36%, B 3%, Co 0.54%, Mn 0.03%, Mo 0.03%, and the rest is Fe. All the other preparation conditions and processes are the same as in Example 1. The mass percent content of N in the treated material is 0.35%.

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Abstract

The invention provides a permanent magnet material containing multiple rare earth phases and a preparation method. The permanent magnet material is high in magnetic energy product; the preparation method is simple in process, low in production cost and suitable for industrial production. The permanent magnet material containing the multiple rare earth phases comprises the following components in percentage by mass: 15-20% of Nd, 3-4% of Y, 4.5-6% of La, 6.0-8.0% of Ce, 3-4% of Pr, 0.15-0.20% of Pd, 0.3-0.4% of Sm, 2-5% of B, 0.45-0.60% of Co, 0.01-0.04% of Mn, 0.01-0.04% of Mo and the balance of Fe; the mass ratio of Pd to Co in the permanent magnet material is 1:3; the mass ratio of Nd to Y to La to Ce to Pr to Pd to Sm is 10:2:3:4:2:0.1:0.2; and the permanent magnet material also comprises 0.15-0.55% of N in percentage by mass.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a multi-rare earth phase permanent magnet material and a preparation method. Background technique [0002] Application No. CN201410730163.5 relates to a high-performance rare earth permanent magnet material, which belongs to the R-T-B series alloy, and the general formula of the alloy is R x T 100-x-y-z m y Q z , where R is one or more of all rare earth elements including Y, T is one or more of Fe, Co, Ni, and M is Nb, V, Mo, W, Cr, Al, One or more of Ti, Zr, Cu, Ga, Q is one or more of B, N, C; where x, y, z satisfy: 10≤x≤13 atomic %; 0≤y≤ 5 atomic %; 0.9≤z≤2 atomic %. But the energy product of the material is not high enough. Contents of the invention [0003] Purpose of the present invention is exactly at above-mentioned technical defect, a kind of multi-rare-earth phase permanent magnet material is provided, and this material has high magnetic energy product. [0004] An...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08C25C3/36C23C8/26B22F3/24
CPCB22F3/24B22F2003/248C23C8/26C25C3/36H01F1/0571H01F1/0575
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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