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Preparation method of high-performance permanent magnet and vacuum undulator magnetic structure with high-performance permanent magnet

A permanent magnet, high-performance technology, applied in the manufacture of permanent magnets, magnetic objects, inductors/transformers/magnets, etc., can solve the problem of unstable heat treatment process, unoptimized permanent magnet orientation thickness, and consistent intrinsic coercive force of permanent magnets Sexuality is not good and other problems, to achieve the effect of Hcj consistency improvement

Active Publication Date: 2017-06-13
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0019] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for preparing a high-performance permanent magnet and a vacuum undulator magnetic structure containing the permanent magnet, so as to solve the problem of unstable heat treatment process and poor consistency of the intrinsic coercive force of the permanent magnet. , The problem of unoptimized permanent magnet orientation thickness

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  • Preparation method of high-performance permanent magnet and vacuum undulator magnetic structure with high-performance permanent magnet
  • Preparation method of high-performance permanent magnet and vacuum undulator magnetic structure with high-performance permanent magnet
  • Preparation method of high-performance permanent magnet and vacuum undulator magnetic structure with high-performance permanent magnet

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Embodiment Construction

[0046] Below, according to the accompanying drawings, preferred embodiments of the present invention are given and described in detail, so that the functions and features of the present invention can be better understood.

[0047] The high-performance permanent magnet preparation method of the present invention is used to greatly improve the intrinsic coercive force of the permanent magnet on the basis of conventional anisotropic sintered NdFeB, PrFeB or NdPrFeB permanent magnets. The specific process flow Such as figure 2 shown, including the following steps:

[0048] S1, providing anisotropic sintered NdFeB, PrFeB or NdPrFeB permanent magnets with a thickness of 2.0mm-2.5mm in the magnetization direction.

[0049] S2, through processes such as surface coating, the surface of the permanent magnet is covered with a layer of TbF3 powder (the powder particle size is 1-7 microns); then the permanent magnet is placed in a molybdenum metal box, because molybdenum metal can be com...

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Abstract

The invention provides a preparation method of a high-performance permanent magnet and a vacuum undulator magnetic structure with the high-performance permanent magnet, wherein the preparation method comprises: S1, providing a permanent magnet 2.0-2.5 mm in magnetizing direction thickness; S2, covering the surface of the permanent magnet with TbF3 powder before placing the permanent magnet in a molybdenum box, subjecting the permanent box to high-temperature grain boundary diffusion, and annealing the permanent magnet; S3, coating the surface of the permanent magnet of step S3 with NiCuNi layer, TiN layer or NiCuTiN layer; S4, subjecting the permanent magnet of step 3 to saturation magnetization; S5, aging the permanent magnet of step S4. The problems of the prior art, such as poor uniformity of intrinsic coercive force in a permanent magnet and zero optimization on orienting thickens of the permanent magnet, are solved.

Description

technical field [0001] The invention relates to permanent magnet material technology, in particular to a preparation method of a high-performance permanent magnet and a vacuum undulator magnetic structure containing the permanent magnet. Background technique [0002] The concept of the Halbach permanent magnet array was first proposed by Professor Ⅺaus Halbach of the Lawrence Berkeley National Laboratory in the United States in the early 1980s. The permanent magnet vacuum undulator (IVU) is a typical Halbach magnetic circuit structure, and it is one of the key equipment of the third-generation synchrotron radiation light source and free electron laser device. In the past thirty years, permanent magnet undulators based on various properties have occupied the vast majority of undulators in synchrotron radiation light sources and free electron laser devices. Among the many permanent magnet undulators, the proportion of permanent magnet vacuum undulators is relatively large, es...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/057
CPCH01F1/0577H01F41/026H01F41/0293
Inventor 何永周
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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