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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 properties, and cost reduction effects

Active Publication Date: 2013-05-15
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] The high bending resistance permanent magnet material is prepared according to the following steps:

[0029] 1) Treatment of neodymium waste: put the neodymium waste in hydrochloric acid with a mass concentration of 25% and mix for 2 hours and stir evenly. The weight ratio of the mixed solution with hydrochloric acid is 2.5:1, and the collected precipitate is kept at a temperature of 120°C for 1 hour and dried, and then placed at a temperature of 1050°C for 1.5 hours to obtain a precipitated rare earth oxide;

[0030] 2) Grinding ingredients: determine the content of Nd, Pr, La and Sc on the precipitated rare earth oxide, and add praseodymium oxide powder, neodymium oxide powder, lanthanum oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition. The weight ratio of the four components of Nd, Pr, La and Sc in the final precipitate rare earth oxide is 5:1:0.01:0.01, after adjustment, mixing and grinding u...

Embodiment 2

[0036] The high bending resistance permanent magnet material is prepared according to the following steps:

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

[0038] 2) Grinding ingredients: determine the content of Nd, Pr, La and Sc on the precipitated rare earth oxide, and add praseodymium oxide powder, neodymium oxide powder, lanthanum oxide powder and scandium oxide powder to the precipitated rare earth oxide after the measurement to adjust the composition. The weight ratio of the four components of Nd...

Embodiment 3

[0044] When preparing the magnetic alloy ingot in step 4), the ingredients are distributed 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] All the other processes are the same as in embodiment one.

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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 Applications(China)
IPC IPC(8): H01F1/057C22C38/12C22C33/02C22C33/06
Inventor 张作州
Owner XUZHOU NANFANG YONGCI MATERIAL
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