Permanent magnetic material prepared from bayan obo symbiotic and concomitant raw ore mixed rare earth and preparation method thereof

A technology of mixed rare earth and permanent magnet materials, which is used in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problem of low content, and achieve the effects of low rare earth content, improved magnetic properties, and high coercivity.

Active Publication Date: 2019-04-02
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiency that the content of the existing mixed rare earth MM in the total rare earth is not high, the object of the present invention is to provide a permanent magnet material and its preparation method prepared by using the mixed rare earth ore in Baiyun Obo

Method used

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  • Permanent magnetic material prepared from bayan obo symbiotic and concomitant raw ore mixed rare earth and preparation method thereof
  • Permanent magnetic material prepared from bayan obo symbiotic and concomitant raw ore mixed rare earth and preparation method thereof
  • Permanent magnetic material prepared from bayan obo symbiotic and concomitant raw ore mixed rare earth and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A permanent magnet material prepared by using mixed rare earths from Baiyun Obo co-associated raw ore, the raw materials include (MM, RE)-Fe-B alloy powder and (Nd, Pr)-Fe-B alloy powder containing mixed rare earth MM, (MM, The chemical formula of RE)-Fe-B is MM by atomic percentage 8.8 Nd 3.4 Fe 81.8 B 6 , (Nd,Pr)-Fe-B chemical formula is Nd by atomic percentage 15 Fe 79 B 6 .

[0037] Its preparation method comprises the following steps:

[0038] Step 1: Weigh MM according to the composition design requirements 8.8 Nd 3.4 Fe 81.8 B 6 and Nd 15 Fe 79 B 6 The ingredients are mixed in proportion to prepare a mixture of two alloys;

[0039] Step 2: Induction heating (1100°C, 2h) of each alloy component mixture prepared in step 1 is carried out under vacuum conditions to melt each alloy component mixture into a liquid, and then cooled to obtain MM 8.8 Nd 3.4 Fe 81.8 B 6 and Nd 15 Fe 79 B 6 Alloy ingots, ensure uniform composition during smelting to ens...

Embodiment 2

[0051] A permanent magnet material prepared by using mixed rare earths from Baiyun Obo co-associated raw ore, the raw materials include (MM, RE)-Fe-B alloy powder and (Nd, Pr)-Fe-B alloy powder containing mixed rare earth MM, (MM, The chemical formula of RE)-Fe-B is MM by atomic percentage 8.8 Nd 3.4 Fe 81.8 B 6 , (Nd,Pr)-Fe-B chemical formula is Nd by atomic percentage 15 Fe 79 B 6 .

[0052] Its preparation method comprises the following steps:

[0053] Step 1: Weigh MM according to the composition design requirements 8.8 Nd 3.4 Fe 81.8 B 6 and Nd 15 Fe 79 B 6 The ingredients are mixed in proportion to prepare a mixture of two alloys;

[0054] Step 2: Induction heating (1100°C, 2h) of each alloy component mixture prepared in step 1 is carried out under vacuum conditions to melt each alloy component mixture into a liquid, and then cooled to obtain MM 8.8 Nd 3.4 Fe 81.8 B 6 and Nd 15 Fe 79 B 6 Alloy ingots, ensure uniform composition during smelting to ens...

Embodiment 3

[0067] A permanent magnet material prepared by using mixed rare earths from Baiyun Obo co-associated raw ore, the raw materials include (MM, RE)-Fe-B alloy powder and (Nd, Pr)-Fe-B alloy powder containing mixed rare earth MM, (MM, The chemical formula of RE)-Fe-B is MM by atomic percentage 8.8 Nd 3.4 Fe 80.8 B 6 co 1 , (Nd,Pr)-Fe-B chemical formula is Nd by atomic percentage 15 Fe 79 B 6 .

[0068] Its preparation method comprises the following steps:

[0069] Step 1: Weigh MM according to the composition design requirements 8.8 Nd 3.4 Fe 80.8 B 6 co 1 and Nd 15 Fe 79 B 6 The ingredients are mixed in proportion to prepare a mixture of two alloys;

[0070]Step 2: Induction heating (1100°C, 2h) of each alloy component mixture prepared in step 1 is carried out under vacuum conditions to melt each alloy component mixture into a liquid, and then cooled to obtain MM 8.8 Nd 3.4 Fe 80.8 B 6 co 1 and Nd 15 Fe 79 B 6 Alloy ingots, ensure uniform composition durin...

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Abstract

The invention discloses a permanent magnetic material prepared from bayan obo symbiotic and concomitant raw ore mixed rare earth and a preparation method thereof. According to the preparation method,by taking bayan obo symbiotic and concomitant raw ore mixed rare earth MM as a raw material, a rare earth permanent magnet is prepared by using at least more than two alloys, and the components of thealloy (MM, RE)-Fe-B and the alloy (Nd, Pr)-Fe-B are optimized in design, so that the magnetic performance is improved. The chemical formula of the alloy (MM, RE)-Fe-B is MMa1REa2Fe(100-a1-a2-b-c)BbAcin atomic percent and the chemical formula of the alloy (Nd, Pr)-Fe-B is (Nd, Pr)a3Fe(100-a3-b-c)BbAc in atomic percent. The rare earth content in the alloy (MM, RE)-Fe-B is much smaller than that inthe (Nd, Pr)-Fe-B, that is, (a1+a2+2) is smaller than or equal to a3. The method can improve of content of mixed rare earth MM while keeping relatively high coercivity and reduce the dosage of Nd andPr, so that the raw material cost and the production cost are lowered obviously. The rare earth separating steps and the separating demands can be further reduced, rare earth resources can be comprehensively utilized to a greater extent, and negative influence of rare earth exploitation and purification and separation is reduced.

Description

technical field [0001] The invention relates to a permanent magnet material prepared by using mixed rare earths from Baiyan Obo co-associated raw ore and a preparation method thereof, belonging to the field of rare earth permanent magnet material preparation. Background technique [0002] Rare earth permanent magnet (Nd,Pr)-Fe-B has the advantages of high remanence, high coercive force, and high magnetic energy product, and has become an indispensable key to modern science and technology, especially in the fields of transportation, computers, aerospace, and clean energy. Material. However, the production and application of rare earth permanent magnets cause excessive consumption of important rare earth elements such as Nd and Pr, and their conservation and rational utilization have become a matter of great concern to the country and the industry. [0003] Rare earth elements La, Ce, Pr, and Nd coexist in rare earth ores, and La and Ce have high abundances in rare earth ores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/04B22F3/10B22F3/24C22C33/02C22C38/00H01F1/057H01F41/02
CPCB22F3/04B22F3/1007B22F3/24B22F2003/248C22C33/0207C22C38/002C22C38/005H01F1/0575H01F41/0266
Inventor 李柱柏张雪峰张志新刘飞刘艳丽李永峰
Owner INNER MONGOLIA UNIV OF SCI & TECH
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