High bending force resistant permanent magnet materials and preparation method thereof

A permanent magnet material and bending technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of insufficient magnetic properties of NdFeB permanent magnet materials, insufficient bending resistance of NdFeB magnets, etc., and achieve good stability and practicability, improved magnetic performance, and the effect of a robust structure

Active Publication Date: 2015-05-13
XUZHOU NANFANG YONGCI MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main technical problem in this technical solution is: the magnetic properties of the obtained NdFeB permanent magnet material are not high enough
The main technical problem in this technical solution is: the bending resistance of the NdFeB magnet is insufficient

Method used

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  • High bending force resistant permanent magnet materials and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare permanent magnet materials with high bending resistance according to the following steps:

[0029] 1) Treatment of neodymium and neodymium waste: Put the neodymium and neodymium waste in hydrochloric acid with a mass concentration of 25% and mix them for 2 hours. The mass ratio of neodymium and neodymium waste to hydrochloric acid is 1:2.0, and then oxalic acid is added to the hydrochloric acid mixture. The weight ratio of the mixed solution with hydrochloric acid is 2.5:1. The collected precipitates are dried at 120°C for 1 hour, and then placed at 1050°C for 1.5 hours to obtain precipitated rare earth oxides;

[0030] 2) Grinding ingredients: Determine the contents of Nd, Pr, La and Sc in the precipitated rare earth oxides. After the measurement, add praseodymium oxide powder, neodymium oxide powder, lanthanum oxide powder and scandium oxide powder to the precipitated rare earth oxide for composition adjustment and adjustment The weight ratio of the four components...

Embodiment 2

[0036] Prepare permanent magnet materials with high bending resistance according to the following steps:

[0037] 1) Treatment of neodymium praseodymium waste: mix the neodymium praseodymium waste in hydrochloric acid with a mass concentration of 30%. The mass ratio of neodymium praseodymium waste and hydrochloric acid is 1:2.0, and then add oxalic acid to the hydrochloric acid mixture and stir evenly. The mixture of oxalic acid and hydrochloric acid The weight ratio is 2.5:1. The precipitate collected after 1.5 hours is dried at 120°C for 1 hour, and then placed at 1100°C for 1 hour to obtain precipitated rare earth oxides.

[0038] 2) Grinding ingredients: Determine the contents of Nd, Pr, La and Sc in the precipitated rare earth oxides. After the measurement, add praseodymium oxide powder, neodymium oxide powder, lanthanum oxide powder and scandium oxide powder to the precipitated rare earth oxide for composition adjustment and adjustment The weight ratio of the four components ...

Embodiment 3

[0044] When preparing the magnetic alloy ingots in step 4), the ingredients are prepared according to the following weight percentages: Nd 25%, Pr 5%, La 0.05%, B 3%, Mo 0.05%, Ni 0.056%, Re 0.05%, Sc 0.05%, and the rest For Fe.

[0045] The rest of the process is the same as the first embodiment.

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Abstract

The invention discloses high bending force resistant permanent magnet materials and a preparation method thereof. The magnet materials comprise, by weight, 22-30% neodymium, 4.4-6% praseodymium, 0.044-0.06% lanthanum, 2-5% boron, 0.044-0.06% molybdenum, 0.044-0.06% nickel, 0.044-0.06% rhenium, 0.044-0.06% scandium and the balance ferrum. The high bending force resistant permanent magnet materials are uniform in organization, strong in structure and capable of improving bending force resistant performance of the materials and magnetic performance. The preparation method of the magnet material takes full use of praseodymium-neodymium waste to directly produce raw materials used by alloy, composition proportion is flexible, quality is well controlled, cost is lowered, the process is simple and powder waste with high oxygen content is fully used.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a permanent magnet material with high bending resistance and a preparation method. Background technique [0002] Application No. CN200510070659.5 discloses a preparation method of NdFeB permanent magnet material. The steps are: first measure the chemical composition of the waste, determine the composition of the waste, and add pure alloy raw materials according to the nominal alloy ingredients. In addition to adding the weight of Nd and B burned during the preparation, add more 0.2%-0.5% metal Nb and 0.5%-1.0% metal Nd according to the total amount of atoms of the alloy’s nominal composition; under the protection of an inert gas, It is heated and melted by an intermediate frequency induction furnace and reaches 1400℃~1550℃. After homogenization of components, it is rapidly cooled into an ingot and then enters the powder making process. The powder with an average particle size of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057C22C38/12C22C33/02C22C33/06
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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