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Neodymium-iron-boron magnetic material and preparation method

A magnetic material, neodymium-iron-boron technology, applied in the direction of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., can solve the problem of low Curie temperature, increase the Curie temperature, increase the coercive force, and improve production The effect on quality and productivity

Active Publication Date: 2019-02-12
徐州永丰磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of low Curie temperature in the prior art, and provide a kind of NdFeB magnetic material and its preparation method

Method used

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  • Neodymium-iron-boron magnetic material and preparation method

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Effect test

Embodiment 1

[0026] A neodymium-iron-boron magnetic material, comprising the following components by weight: 29 parts of praseodymium-neodymium alloy, 3 parts of dysprosium-iron alloy, 3 parts of boron-iron alloy, 0.6 part of niobium-iron alloy, 5 parts of yttrium-iron alloy, 1.0 part of nano silicon dioxide, gallium 0.1 part, 0.5 part of aluminum oxide, 1 part of antioxidant, and the balance is iron. The antioxidant is a mixture of antioxidant 1010 and antioxidant 1076, wherein the weight ratio of antioxidant 1010 to antioxidant 1076 is 1:1, and the particle size of silicon dioxide is 45nm.

[0027] A method for preparing an NdFeB magnetic material, comprising the following steps:

[0028] Step 1 batching: Weigh the raw materials according to the weight of each component in the NdFeB magnetic material, and mix the components together, after the mixing is completed;

[0029] Step 2 Melting the alloy: put the raw materials prepared in step 1 into the intermediate frequency vacuum melting f...

Embodiment 2

[0037] A neodymium-iron-boron magnetic material, comprising the following components by weight: 31 parts of praseodymium-neodymium alloy, 5 parts of dysprosium-iron alloy, 5 parts of boron-iron alloy, 0.7 part of niobium-iron alloy, 6 parts of yttrium-iron alloy, 2 parts of nano silicon dioxide, gallium 0.2 parts, 0.8 parts of aluminum oxide, 1.5 parts of antioxidant, and the balance is iron. The antioxidant is a mixture of antioxidant 1010 and antioxidant 1076, wherein the weight ratio of antioxidant 1010 to antioxidant 1076 is 1:2, and the particle size of silicon dioxide is 60nm.

[0038] A method for preparing an NdFeB magnetic material, comprising the following steps:

[0039] Step 1 batching: Weigh the raw materials according to the weight of each component in the NdFeB magnetic material, and mix the components together, after the mixing is completed;

[0040] Step 2 Melting the alloy: put the raw materials prepared in step 1 into the intermediate frequency vacuum melti...

Embodiment 3

[0048]A neodymium-iron-boron magnetic material, comprising the following components by weight: 33 parts of praseodymium-neodymium alloy, 6 parts of dysprosium-iron alloy, 7 parts of boron-iron alloy, 0.8 part of niobium-iron alloy, 8 parts of yttrium-iron alloy, 2.5 parts of nano silicon dioxide, gallium 0.3 parts, 1 part of alumina, 2 parts of antioxidant, and the balance is iron. The antioxidant is a mixture of antioxidant 1010 and antioxidant 1076, wherein the weight ratio of antioxidant 1010 to antioxidant 1076 is 1:3, and the particle size of silicon dioxide is 80nm.

[0049] A method for preparing an NdFeB magnetic material, comprising the following steps:

[0050] Step 1 batching: Weigh the raw materials according to the weight of each component in the NdFeB magnetic material, and mix the components together, after the mixing is completed;

[0051] Step 2 Melting the alloy: put the raw materials prepared in step 1 into the intermediate frequency vacuum melting furnace ...

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Abstract

The invention belongs to the field of magnetic materials and particularly relates to a neodymium-iron-boron magnetic material and a preparation method. The neodymium-iron-boron magnetic material comprises, by weight, 29-33 parts of praseodymium-neodymium alloy, 3-6 parts of dysprosium-iron alloy, 3-7 parts of boron-iron alloy, 0.6-0.8 part of niobium-iron alloy, 5-8 parts of yttrium-iron alloy, 1.0-2.5 parts of nano silica, 0.1-0.3 part of gallium, 0.5-1 part of aluminium oxide, 1-2 parts of an antioxidant and the balance iron. The obtained neodymium-iron-boron magnetic material has the advantages that by adding the nano silica and the niobium-iron alloy into the neodymium-iron-boron magnetic material and adopting the praseodymium-neodymium alloy as a main component, the Curie temperatureis remarkably increased, the coercive force of the neodymium-iron-boron magnetic material is increased, and the application value of the neodymium-iron-boron magnetic material is increased.

Description

technical field [0001] The invention belongs to the field of magnetic materials, in particular to a neodymium-iron-boron magnetic material and a preparation method. Background technique [0002] At present, the new material industry, which is the foundation of the high-tech industry, has attracted much attention. As an important part of the new material industry, rare earth permanent magnet materials are widely used in energy, transportation, machinery, medical care, IT, home appliances and other industries. It is one of the important symbols of national strength and national economic development level. In particular, NdFeB, as the third-generation rare earth permanent magnet material, has broad market prospects and is mainly used in computer disk drives, nuclear magnetic resonance imaging instruments, various audio-visual equipment, microwave communications, magnetic machinery, household appliances, etc. At present, the NdFeB industry has also entered a critical period of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/058H01F41/02
CPCH01F1/058H01F41/0253H01F41/0266
Inventor 张昌州张序
Owner 徐州永丰磁业有限公司
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