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Neodymium iron boron material and preparation method and application thereof

A kind of NdFeB technology, applied in the direction of magnetic materials, inorganic material magnetism, inductance/transformer/magnet manufacturing, etc. question

Active Publication Date: 2020-06-19
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at overcoming the need to add a large amount of heavy rare earth elements when the low boron system is used to improve the magnetic properties of the prior art neodymium iron boron materials, and even if the heavy rare earth elements are added, the magnetic properties (remanence, coercivity, temperature stability) properties, squareness) still can not be significantly improved defects, but provides a NdFeB material and its preparation method and application

Method used

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  • Neodymium iron boron material and preparation method and application thereof
  • Neodymium iron boron material and preparation method and application thereof
  • Neodymium iron boron material and preparation method and application thereof

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Embodiment Construction

[0143] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the described examples. The experimental methods that do not specify specific conditions in the following examples are selected according to conventional methods and conditions, or according to the product description.

[0144] 1. The formulations (wt%) of the raw material compositions of NdFeB materials in Examples 1-16 and Comparative Examples 1-8 are shown in Table 1 below.

[0145] Table 1

[0146]

[0147]

[0148] Note: " / " means not containing this element. wt% is mass percentage.

[0149] 2. The preparation method of the neodymium-iron-boron material of embodiment 1

[0150] The raw materials used in the preparation of NdFeB materials in this example are shown in Table 1, and the preparation process is as follows:

[0151] (1) Melting process: according to the formula shown in Example 1 in Table 1, get the prepared raw materials...

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Abstract

The invention discloses a neodymium iron boron material and a preparation method and application thereof. The raw material composition of the neodymium iron boron material comprises the following components by mass: 28.5-34% of R; R is a rare earth element and comprises Nd; 0.84%-0.94% of B; Cu: 0.45 < Cu < = 2%; Co: < = 2.5%, but not 0; Fe: 61 to 69 %; N, containing one or more of Ti, Zr and Nb.When N contains Ti, the content of Ti is 0.15%-0.25%. When N contains Zr, the content of Zr is 0.2%-0.35%. When N contains Nb, Nb is 0.2%-0.5%; wherein the percentage is the mass percentage of each component in the total mass of the raw material composition. According to the neodymium iron boron material, on the premise of not adding heavy rare earth elements, the neodymium iron boron material which is good in magnetic performance and uniform in magnetic performance in the same batch can still be prepared by adopting a low-boron aluminum-free system.

Description

technical field [0001] The invention specifically relates to a neodymium iron boron material and its preparation method and application. Background technique [0002] NdFeB magnet materials are widely used in electronic products, automobiles, wind power, home appliances, elevators and industrial robots due to their excellent magnetic properties, such as permanent magnets such as hard disks, mobile phones, headphones, and elevator traction machines and generators. As an energy source in motors, its demand is increasing day by day, and the requirements of various manufacturers for magnet properties such as remanence, coercive force performance, temperature stability, and magnet squareness are also gradually increasing. [0003] NdFeB magnet materials are mainly composed of R 2 T 14 The main phase of the B compound and the grain boundary phase located in the grain boundary portion of the main phase are constituted. The R 2 T 14 B compound is a strong magnetic material with...

Claims

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Application Information

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IPC IPC(8): H01F1/057H01F1/08H01F41/02
CPCH01F1/057H01F1/08H01F1/086H01F41/02H01F41/0253H01F41/0266
Inventor 付刚胡季帆黄佳莹黄清芳许德钦
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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