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Novel neodymium iron boron magnetic material

A magnetic material, NdFeB technology, applied in the field of new NdFeB magnetic materials, can solve the problems of high price, no price advantage, poor high temperature application performance, etc., and achieve the effect of cost reduction

Active Publication Date: 2010-04-14
麦格昆磁(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The research in this area is basically blank. Only in 1983, Sumitomo Special Metals Corporation of Japan proposed the European patent EP0126802A1, which was the first attempt to replace part of neodymium (Nd) with Dy or Tb alone. However, the high-temperature application performance of the products involved in this patent application is relatively Poor, low coercive force
And compared with Nd, the price of Dy and Tb is also very expensive, there is no price advantage at all

Method used

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  • Novel neodymium iron boron magnetic material

Examples

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Effect test

Embodiment 1

[0015] The preparation of new NdFeB magnetic materials, in which 10wt% of Nd is replaced by Ce, the resulting new NdFeB magnetic materials can be used to replace high-end NdFeB magnetic materials on the market, usually the product code is MQP-B.

[0016] Weigh 11.86g metal Nd (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 1.32g metal Ce (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 2.76g ferroboron (purchased from Liaoyang International Boron Alloy Co., Ltd. ), 34.06g of pure iron (purchased from Taiyuan Guangci Metal Materials Co., Ltd.), and then smelted in an electric arc furnace under the protection of an inert gas of about 2 / 3 atmospheric pressure, such as argon. In order to obtain alloy ingots with uniform composition, at least 4 times of remelting are required. Then, the obtained alloy ingot melt is rapidly quenched, and the rotation speed of the cooling wheel is about 20-30 m / s (the linear speed of the rim), so as to obtain a thin m...

Embodiment 2

[0021] The preparation of new NdFeB magnetic materials, wherein 20wt% of Nd is replaced by Ce, the resulting new NdFeB magnetic materials can be used to replace the middle and high-end NdFeB magnetic materials on the market (generally believed that BHmax is about 13-15MGOe NdFeB materials are mid-to-high-end NdFeB magnetic materials), and the product code of mid-to-high-end NdFeB magnetic materials on the market is MQP-15-9 (produced by Magnequench (Tianjin) Co., Ltd.).

[0022] Weigh 10.54g metal Nd (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 2.64g metal Ce (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 2.76g ferroboron (Liaoyang International Boron Alloy Co., Ltd.), 34.06g pure iron (Taiyuan Guangci Metal Materials Co., Ltd.), repeat the preparation process of sample 1, and obtain a weight ratio of approximately Ce 0.054 Nd 0.216 Fe 0.72 B 0.01 The magnetic powder, as sample 2. Inductively coupled plasma atomic emission spectrometer...

Embodiment 3

[0027]Preparation of novel NdFeB magnetic materials, wherein 30wt% of Nd is replaced by Ce, and the resulting novel NdFeB magnetic materials can be used to replace mid-range NdFeB magnetic materials on the market (generally believed that BHmax is about 11-13MGOe NdFeB material is a mid-range NdFeB magnetic material), usually the product code is MQP-14-8 (manufactured by Magnequench (Tianjin) Co., Ltd.).

[0028] Weigh 9.23g metal Nd (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 3.95g metal Ce (purchased from Ganzhou Keli Rare Earth New Material Co., Ltd.), 2.76g ferroboron (Liaoyang International Boron Alloy Co., Ltd.), 34.06g pure iron (Taiyuan Guangci Metal Materials Co., Ltd.), repeat the preparation process of sample 1, and obtain a weight ratio of approximately Ce 0.081 Nd 0.189 Fe 0.72 B 0.01 The magnetic powder, as sample 3. The weight ratio of each component of sample 3 magnetic powder was measured by inductively coupled plasma atomic emission sp...

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Abstract

The invention discloses a novel neodymium iron boron magnetic material, which is characterized in that the general molecular formula of the neodymium iron boron magnetic material is RExNd(0.27-x)Fe0.72B0.01, wherein the RE is selected from at least one of lanthanide / actinium metals except neodymium, and x is the weight ratio of the RE and is about 0.027-0.108. For the novel neodymium iron boron magnetic material preferably selected in the invention, rare earth element cerium (Ce) replaces the partial neodymium (Nd), good magnetism and corrosion resistance can be still kept basically, and has remarkable cost and price advantages are realized.

Description

technical field [0001] The present invention relates to a novel NdFeB magnetic material based on a new type of NdFeB magnetic material, in particular to a high-performance isotropic NdFeB magnetic material doped with at least one lanthanide rare earth element, more specifically, the present invention relates to a lanthanide rare earth element cerium (Ce) doped NdFeB magnetic material. Background technique [0002] At present, the new material industry, which is the foundation of the high-tech industry, has attracted much attention. As an important part of the new material industry, rare earth permanent magnet materials are widely used in energy, transportation, machinery, medical care, IT, home appliances and other industries. It is one of the important symbols of national strength and national economic development level. In particular, NdFeB, as the third-generation rare earth permanent magnet material, has broad market prospects and is mainly used in computer disk drives...

Claims

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Application Information

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IPC IPC(8): H01F1/057
Inventor 何峰
Owner 麦格昆磁(天津)有限公司
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