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A kind of r-t-b series permanent magnet material and its preparation method and application

A R-T-B, permanent magnet material technology, applied in the direction of magnetic materials, inductor/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of poor consistency, deterioration of magnet performance, etc., to achieve good temperature stability, low magnetic permeability, high performance excellent effect

Active Publication Date: 2022-03-01
FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects in the prior art that when B<5.88at% in the R-T-B system magnet, the magnet performance is deteriorated and the consistency is poor, and a kind of R-T-B system permanent magnet material and its preparation method and application are provided

Method used

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  • A kind of r-t-b series permanent magnet material and its preparation method and application
  • A kind of r-t-b series permanent magnet material and its preparation method and application
  • A kind of r-t-b series permanent magnet material and its preparation method and application

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Effect test

Embodiment 1

[0082] The raw materials used for preparing the R-T-B series permanent magnet material in the present embodiment are as shown in Table 1, and the process of its preparation is as follows:

[0083] (1) Melting: according to the formula shown in Table 1, take the prepared raw materials and put them into an alumina crucible, and carry out the melting process at a temperature of 1500°C in a high-frequency vacuum induction melting furnace under the condition that the vacuum degree is less than 0.02Pa. Vacuum melting.

[0084] (2) Casting: Ar gas is introduced into the smelting furnace after vacuum smelting to make the air pressure reach 55,000 Pa, and then casting is carried out, and the melt is passed through a copper roller with a speed of 29 rpm to obtain a quick-setting with a thickness of 0.12-0.35mm Alloy sheets, during the casting process, the copper rollers need to be fed with chilled water, and the water inlet temperature is ≤25°C (as shown in Table 2); 2 ℃ / sec-10 4 °C / s...

Embodiment 2～20、 comparative example 1～12

[0103] Raw materials were prepared according to the formula shown in Table 1. Except for the conditions shown in Table 2, other process conditions were the same as in Example 1 to obtain the R-T-B series permanent magnet material.

[0104] Table 2

[0105]

[0106]

[0107]

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Abstract

The invention discloses an R-T-B permanent magnet material, a preparation method and an application thereof. The R-T-B series permanent magnet material includes: R, Ga, Cu, Al, Fe and B, and also includes one or more of Ti, Zr and Nb, in weight percentage, its content is as follows: R content The content of Ga is 28.5-33.03%; the content of Ga is more than 0.35%; the content of Cu is more than 0.4%; the content of B is 0.84-0.945%; the content of Al is less than 0.08%; Contains Co. The R‑T‑B permanent magnet material has high coercive force Hcj and Br, good temperature stability and excellent performance of the magnet; and its demagnetization curve has no steps, the relative magnetic permeability is low, and the uniformity of the magnet steel is good.

Description

technical field [0001] The invention relates to an R-T-B series permanent magnet material and its preparation method and application. Background technique [0002] R-T-B series sintered magnets (R refers to rare earth elements, T refers to transition metal elements and the third main group metal elements, and B refers to boron elements) are currently the most widely used rare earth permanent magnet materials, and are widely used in electronics, electrical machinery, and medical equipment. , toys, packaging, hardware machinery, aerospace and other fields, the more common permanent magnet motors, speakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment and instruments, etc. [0003] It is found in the experiment that when the B content is high, more B-rich phases will be formed, which in turn will affect the remanence properties of the product. Therefore, in order to increase the remanence of R-T-B sintered magnets, it is usually necessary to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F41/02
CPCH01F1/0577H01F41/0253H01F41/0266
Inventor 付刚黄清芳黄佳莹陈大崑许德钦
Owner FUJIAN CHANGJIANG GOLDEN DRAGON RARE EARTH CO LTD
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