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A kind of neodymium iron boron magnetic material and preparation method thereof

A magnetic material, neodymium iron boron technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of low Curie temperature point, poor temperature characteristics, limited application fields, etc., to increase the Curie temperature, change Heat resistance, cost reduction effect

Active Publication Date: 2018-01-16
宁波市鄞州区亿能磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantages are high cost performance and good mechanical properties; but its disadvantages are low Curie temperature and poor temperature characteristics. Generally, it can only work at temperatures below 150°C, which limits its application fields.

Method used

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  • A kind of neodymium iron boron magnetic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] A kind of neodymium iron boron magnetic material that the present embodiment provides, its composition weight percent is that light rare earth element is Nd and Ce, and Nd is 29%, and Ce is 0.5%, and heavy rare earth element is Dy and Er, and Dy is 4%, and Er Al is 0.8%, Al is 1%, Cu is 1%, Co is 2%, B is 0.3%, and the balance is Fe.

[0022] The preparation method of the above-mentioned NdFeB magnetic material comprises the following steps:

[0023] ① Ingredients, weighed according to the weight percentage of the composition of the NdFeB magnetic material, and set aside;

[0024] ②Smelting, first melt light rare earth elements at 1100°C, then add heavy rare earth elements to melt at 1400°C, then add Al, Cu, Co, B, Fe metal powder or alloys and melt at 1550°C, and then melt all the above melted After the components are fully mixed, they are cast and cooled to form NdFeB blocks;

[0025] ③ Hydrogen crushing, put the NdFeB blocks into the hydrogen crushing device to obt...

Embodiment 2

[0031] A kind of neodymium iron boron magnetic material that this embodiment provides, its composition weight percentage is that light rare earth element is Nd and La, and Nd is 28%, and La is 0.5%, and heavy rare earth element is Dy and Tb, and Dy is 3%, and Tb Al is 1%, Al is 2%, Cu is 2%, Co is 3%, B is 0.5%, and the balance is Fe. The preparation method of the above-mentioned NdFeB magnetic material is consistent with that of Example 1. The properties of the NdFeB magnetic material obtained in this embodiment are shown in Table 1.

Embodiment 3

[0033] A kind of NdFeB magnetic material provided by this embodiment, its composition weight percent is Nd, Pr and Gd as light rare earth elements, Nd is 28.5%, Pr is 0.5%, Gd is 0.5%, and heavy rare earth elements are Dy, Tb And Y, Dy is 3.5%, Tb is 0.5%, Y is 0.5%, Al is 1.5%, Cu is 1.5%, Co is 2.5%, B is 0.4%, and the balance is Fe. The preparation method of the above-mentioned NdFeB magnetic material is consistent with that of Example 1. The properties of the NdFeB magnetic material obtained in this embodiment are shown in Table 1.

[0034] Table 1

[0035] NdFeB magnetic material performance table

[0036]

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Abstract

The invention discloses a neodymium-iron-boron magnetic material and a preparation method thereof. The composition weight percentage of the neodymium-iron-boron magnetic material is 29% to 30% for light rare earth elements, 4% to 5% for heavy rare earth elements, and 1% for Al %~2%, Cu is 1%~2%, Co is 2%~3%, B is 0.3%~0.5%, the balance is Fe, and the light rare earth elements are La, Ce, Pr, Nd, Sm, Gd Two or more of Tb, Dy, Ho, Er, and Y are two or more of heavy rare earth elements. The technical effect of the NdFeB magnetic material obtained in the present invention is to change its heat resistance by adding light rare earth elements in the NdFeB magnetic material, thereby increasing the Curie temperature, adding heavy rare earth raw materials, and improving its coercive force .

Description

technical field [0001] The invention relates to a neodymium iron boron magnetic material and a preparation method. Background technique [0002] The main properties of NdFeB magnetic materials are reflected in four aspects: remanence (Br), maximum energy product (BHmax), coercive force (Hc), and Curie temperature (Tc). [0003] Remanence - After the ferromagnet is magnetized to saturation and the external magnetic field is removed, the residual magnetization or residual magnetic induction retained in the magnetization direction is called remanence. [0004] Maximum energy product - the maximum value of the product of magnetic induction and magnetic field strength on the demagnetization curve. The larger the value, the greater the magnetic energy stored in the unit volume, and the better the performance of the material. [0005] Coercive force (Hc)--Coercive force characterizes the ability of materials to resist demagnetization, which can be divided into magnetically induce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/057H01F1/08B22F3/16
Inventor 陈泉
Owner 宁波市鄞州区亿能磁业有限公司
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