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Neodymium iron boron magnetic materials and preparation method of the same

A magnetic material, neodymium-iron-boron technology, applied in the field of neodymium-iron-boron magnetic materials and preparation, can solve the problems of insufficient damage resistance of materials, insufficient magnetic properties of materials, etc., achieve good stability and practicability, improve the environment, and be strong structure effect

Active Publication Date: 2013-05-08
江苏澳芯微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem that this technical scheme exists is: the magnetic performance of the obtained material is not high enough
The main problem of this technical solution is: the failure resistance of the obtained material is not high enough

Method used

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  • Neodymium iron boron magnetic materials and preparation method of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Follow the steps below to prepare high toughness magnetic materials:

[0031] 1) Treatment of praseodymium neodymium waste: place praseodymium neodymium waste in hydrochloric acid with a mass concentration of 25% and mix, the mass ratio of praseodymium neodymium waste and hydrochloric acid is 1:2.0, then add oxalic acid to the hydrochloric acid mixture and stir evenly, and mix oxalic acid and hydrochloric acid The weight ratio of the liquid is 2.5:1. The precipitate collected after 1 hour is dried at 120°C for 1 hour, and then placed at a temperature of 1050°C for 1.5 hours to obtain precipitated rare earth oxides.

[0032]2) Grinding ingredients: measure the Nd, Pr, Gd and Sc content of the precipitated rare earth oxides, add praseodymium oxide powder, neodymium oxide powder, gadolinium oxide powder and scandium oxide powder to the precipitated rare earth oxides to adjust the components after the measurement. The weight ratio of the four components of Nd, Pr, Gd and Sc...

Embodiment 2

[0038] Follow the steps below to prepare high toughness magnetic materials:

[0039] 1) Treatment of praseodymium neodymium waste: place praseodymium neodymium waste in hydrochloric acid with a mass concentration of 30% and mix, the mass ratio of praseodymium neodymium waste and hydrochloric acid is 1:2.3, then add oxalic acid to the hydrochloric acid mixture and stir evenly, oxalic acid and hydrochloric acid are mixed The weight ratio of the liquid is 2.5:1, and the precipitate collected after 2 hours is dried at a temperature of 120°C for 1 hour, and then placed at a temperature of 1100°C for 1.5 hours to obtain a precipitated rare earth oxide;

[0040] 2) Grinding ingredients: measure the Nd, Pr, Gd and Sc content of the precipitated rare earth oxides, add praseodymium oxide powder, neodymium oxide powder, gadolinium oxide powder and scandium oxide powder to the precipitated rare earth oxides to adjust the components after the measurement. The weight ratio of the four compo...

Embodiment 3

[0046] When preparing the magnetic alloy ingot in step 4), the ingredients are prepared according to the following weight percentages: Nd 30%, Pr 5%, Gd 0.5%, B 3%, Nb 0.12%, Hf 0.015%, W 0.015%, Sc 0.05%, and the rest is Fe.

[0047] The rest of the preparation process is the same as in Example 1.

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Abstract

The invention discloses neodymium iron boron magnetic materials and a preparation method of the neodymium iron boron magnetic materials. The neodymium iron boron magnetic materials comprise, by weight, 27-34.5 % of neodymium (Nd), 4.5-5.75 % of praseodymium (Pr), 0.45-0.575 of gadolinium (Gd), 2-4% of boron (B), 0.08-0.16 % of niobium (Nb), 0.01-0.02 % of hafnium (Hf), 0.01-0.02 % of wolfram (W) and 0.045-0.0575 % of scandium (Sc), and the rest is ferrum (Fe). The neodymium iron boron magnetic materials have uniform textures and strong structures, and can not only improve tenacity performance of the materials but also improve magnetic performance to some extent. The preparation method of the neodymium iron boron magnetic materials fully utilizes praseodymium-neodymium waste materials to directly produce raw materials for alloy, is flexible in composition proportion, qualified in quality control, capable of reducing cost and simple in technology, and fully utilizes waste powder materials with high oxygen content.

Description

[0001] technical field [0002] The invention belongs to the field of functional materials, and in particular relates to an NdFeB magnetic material and a preparation method. [0003] Background technique [0004] CN200910003955.1 discloses a method for making permanent magnet materials from powder waste. The process steps of the method are as follows: 1) Powder waste treatment: remove oil and moisture in the powder waste by heating; 2) Powder fluorination treatment: put the dried powder waste into a sealed container, and pass through 400- Fluorine gas at 600°C, make the pressure reach 1-2kpa, keep it for 1-3 hours, fully remove oxygen, and obtain fluoride powder; 3) Smelting of rough NdFeB NdFeB alloy: fluoride powder: metal calcium Cutting = 1:1 mixing, pressing into a billet and putting it into a vacuum induction furnace, heating at 1300-1600°C, and casting for 0.5-1 hour to obtain coarse NdFeB alloy and calcium fluoride waste; 4) Smelting of NdFeB NdFeB alloy: Analyze ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057C22C38/00C22C33/06C25C3/36
Inventor 赵浩峰王玲蒋晓龙陈晓玲邱奕婷陆阳平王冰郑泽昌柯维雄赵佳玉侯少杰王明一张林胡赓祥
Owner 江苏澳芯微电子有限公司
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