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Preparation method of high-temperature-resistant neodymium-iron-boron magnetic material

A neodymium-iron-boron, high-temperature-resistant technology, applied in magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of limiting the use range of neodymium-iron-boron magnetic materials and degrading the magnetic properties of neodymium-iron-boron magnetic materials, etc. Achieve the effect of improving remanence, improving magnetic properties and high temperature resistance, and reducing production costs

Pending Publication Date: 2022-07-29
宁波大缙华磁性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the ambient temperature rises, the magnetic properties of NdFeB magnetic materials will decrease significantly, which greatly limits the application range of NdFeB magnetic materials and needs to be improved

Method used

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  • Preparation method of high-temperature-resistant neodymium-iron-boron magnetic material
  • Preparation method of high-temperature-resistant neodymium-iron-boron magnetic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A high temperature resistant NdFeB magnetic material, comprising the following components: 13wt% praseodymium neodymium, 0.5wt% boron, 15wt% yttrium, 3wt% samarium, 2.5wt% gadolinium, 0.5wt% cobalt, 0.08wt% iridium, 8wt% niobium, 3wt% dysprosium, 10wt% cerium, balance iron and non-removable impurities.

[0044] The preparation method of the above-mentioned NdFeB magnetic material comprises the following steps:

[0045] S1 smelting: put iron niobium block, iron boron block, praseodymium neodymium block, dysprosium iron block, pure iron block, cerium block, iridium block, yttrium block and samarium block into a smelting furnace according to a certain weight ratio for smelting; the obtained molten liquid Pouring on a water-cooled roller for stripping to obtain stripping sheets;

[0046] S2 pulverization: put the thin strip prepared in S1 into the hydrogen breaking furnace, the absolute pressure in the hydrogen breaking furnace is 2Pa, pass hydrogen at room temperature, carr...

Embodiment 2

[0051] A high temperature resistant NdFeB magnetic material, comprising the following components: 15wt% praseodymium neodymium, 0.75wt% boron, 21.5wt% yttrium, 2.5wt% samarium, 4wt% gadolinium, 1wt% cobalt, 0.10wt% iridium, 9wt% niobium, 4wt% dysprosium, 12wt% cerium, balance iron and non-removable impurities.

[0052] The preparation method of the above-mentioned NdFeB magnetic material comprises the following steps:

[0053] S1 smelting: put iron niobium block, iron boron block, praseodymium neodymium block, dysprosium iron block, pure iron block, cerium block, iridium block, yttrium block and samarium block powder into a smelting furnace according to a certain weight ratio for smelting; The liquid is poured on the water-cooled roller for stripping, and the stripping sheet is obtained;

[0054] S2 pulverization: put the thin strip prepared in S1 into the hydrogen breaking furnace, the vacuum degree in the hydrogen breaking furnace is 2Pa, pass hydrogen at room temperature, ...

Embodiment 3

[0059] A high temperature resistant NdFeB magnetic material, comprising the following components: 18wt% praseodymium neodymium, 1wt% boron, 28wt% samarium, 6.5wt% gadolinium, 1.5wt% cobalt, 0.12wt% iridium, 10wt% niobium, 5wt% % dysprosium, 15 wt% cerium, balance iron and non-removable impurities.

[0060] The preparation method of the above-mentioned NdFeB magnetic material comprises the following steps:

[0061] S1 smelting: put iron niobium block, iron boron block, praseodymium neodymium block, dysprosium iron block, pure iron block, cerium block, iridium block, yttrium block and samarium block into a smelting furnace according to a certain weight ratio for smelting; the obtained molten liquid Pouring on a water-cooled roller for stripping to obtain stripping sheets;

[0062] S2 pulverization: put the thin strip prepared in S1 into the hydrogen breaking furnace, the absolute pressure in the hydrogen breaking furnace is 2Pa, pass hydrogen at room temperature, carry out the ...

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Abstract

The invention relates to the technical field of magnetic materials, and discloses a preparation method of a high-temperature-resistant neodymium iron boron magnetic material, which comprises the following steps: S1, smelting, S2, crushing, S3, orienting and profiling, S4, sintering, and S5, vacuum coating. The neodymium-iron-boron magnetic material comprises the following components in percentage by weight: 13 to 18 percent of praseodymium neodymium, 0.5 to 1 percent of boron, 18 to 30 percent of samarium and yttrium, 3 to 8 percent of auxiliary metal, 0.08 to 0.12 percent of iridium, 8 to 10 percent of niobium, 3 to 5 percent of dysprosium, 10 to 15 percent of cerium and the balance of iron and unremovable impurities, and the mass ratio of yttrium to samarium is (5 to 14): 1. The magnetic performance and the high temperature resistance of the neodymium-iron-boron magnetic material can be improved.

Description

technical field [0001] The present application relates to the technical field of magnetic materials, in particular to a preparation method of a high temperature resistant NdFeB magnetic material. Background technique [0002] Sintered NdFeB magnetic material is the most powerful permanent magnetic material in contemporary times. It has excellent characteristics such as high magnetic energy product and high cost performance. It has been used in aviation, aerospace, microwave communication technology, electronics, electro-acoustic, electromechanical and other fields. However, with the continuous expansion of the application range of permanent magnets, people's demand for them also increases. While the types of equipment that permanent magnets meet, it also poses a challenge to the applicable temperature of permanent magnets. [0003] Although NdFeB magnets have high magnetic properties, their Curie temperature (compared to 310°C) is low and the temperature coefficient is high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/057H01F1/0577H01F41/0293H01F41/02
Inventor 康振长吴国军
Owner 宁波大缙华磁性材料有限公司
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