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Neodymium iron boron magnetic materials and preparation method of the same

A magnetic material and NdFeB technology, applied in the field of NdFeB magnetic materials and preparation, can solve the problems of insufficient magnetic properties of materials and insufficient damage resistance of materials, and achieve improved environment, good stability and practicability, and high social effect of value

Active Publication Date: 2015-07-01
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
  • Neodymium iron boron magnetic materials and preparation method of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare high-toughness magnetic materials according to the following steps:

[0028] 1) PrNd waste treatment: place praseodymium neodymium waste in hydrochloric acid with a mass concentration of 25% and mix them. The mass ratio of praseodymium neodymium waste to hydrochloric acid is 1:2.0, then add oxalic acid into the hydrochloric acid mixture and stir evenly, then mix the oxalic acid with hydrochloric acid The weight ratio of the solution was 2.5:1. The precipitate collected after 1 hour was dried at a temperature of 120° C. for 1 hour, and then kept at a temperature of 1050° C. for 1.5 hours to obtain a precipitated rare earth oxide.

[0029]2) Grinding ingredients: measure the content of Nd, Pr, Gd and Sc on the precipitated rare earth oxide, and add praseodymium oxide powder, neodymium oxide powder, gadolinium oxide powder and scandium oxide powder to the precipitated rare earth oxide to adjust the composition. The weight ratio of the four components of Nd, Pr, Gd ...

Embodiment 2

[0035] Prepare high-toughness magnetic materials according to the following steps:

[0036] 1) Treatment of praseodymium and neodymium waste: place praseodymium and neodymium waste in hydrochloric acid with a mass concentration of 30% and mix them, the mass ratio of praseodymium and neodymium waste to hydrochloric acid is 1:2.3, then add oxalic acid into the hydrochloric acid mixture and stir evenly, and mix the oxalic acid and hydrochloric acid The weight ratio of the solution is 2.5:1. The precipitate collected after 2 hours is dried at a temperature of 120°C for 1 hour, and then kept at a temperature of 1100°C for 1.5 hours to obtain a precipitated rare earth oxide;

[0037] 2) Grinding ingredients: measure the content of Nd, Pr, Gd and Sc on the precipitated rare earth oxide, and add praseodymium oxide powder, neodymium oxide powder, gadolinium oxide powder and scandium oxide powder to the precipitated rare earth oxide to adjust the composition. The weight ratio of the fou...

Embodiment 3

[0043] When preparing the magnetic alloy ingot in step 4), the ingredients are distributed 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%, the rest For Fe.

[0044] All the other preparation processes are 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

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to an NdFeB magnetic material and a preparation method. Background technique [0002] 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 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 the composition of crude...

Claims

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Application Information

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Patent Type & Authority Patents(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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