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Rare earth permanent magnetic device with lanthanum and cerium added and manufacturing method thereof

A rare earth permanent magnet and manufacturing method technology, applied in the direction of inductance/transformer/magnet manufacturing, magnetic materials, electrical components, etc., can solve the problems of magnet heat resistance, magnetic influence, limited utilization and so on

Active Publication Date: 2020-06-19
SHENYANG GENERAL MAGNETIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply replacing praseodymium and neodymium with lanthanum and cerium will have a great impact on the heat resistance and magnetic properties of the magnet, which limits the utilization of lanthanum and cerium in NdFeB rare earth permanent magnet devices.

Method used

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  • Rare earth permanent magnetic device with lanthanum and cerium added and manufacturing method thereof
  • Rare earth permanent magnetic device with lanthanum and cerium added and manufacturing method thereof
  • Rare earth permanent magnetic device with lanthanum and cerium added and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0054] Adopt the vacuum coating equipment among the present invention to coat No. 0 sample, the sputtering device in the vacuum coating equipment presses figure 1 The arrangement of the embodiment in , that is, one ion source and three multi-arc targets, wherein the targets of multi-arc targets 9 and 10 are PrNd alloys, and the target material of multi-arc target 11 is metal Tb. When the equipment is working, the carrying device containing the No. 0 sample is sequentially coated through the ion source sputtering area and the multi-arc target sputtering area. Then the No. 0 sample with coating on the surface was sent to the vacuum heat treatment equipment for grain boundary diffusion heat treatment, and the finished rare earth permanent magnet device was made into No. 1 sample.

Embodiment 2

[0056] Adopt the vacuum coating equipment among the present invention to coat No. 0 sample, the sputtering device in the vacuum coating equipment presses figure 2 The arrangement of the embodiment in , that is, one ion source and three magnetron sputtering targets, wherein the target material of magnetron sputtering targets 20 and 21 is PrNd alloy, and the target material of magnetron sputtering target 22 is metal Tb. When the equipment is working, the carrying device containing the No. 0 sample passes through the sputtering area of ​​the ion source and the sputtering area of ​​the magnetron sputtering target for coating in sequence. Then, the No. 0 sample with coating on the surface was sent to the vacuum heat treatment equipment for grain boundary diffusion heat treatment, and the finished rare earth permanent magnet device was made into No. 2 sample.

Embodiment 3

[0058] Adopt the vacuum coating equipment among the present invention to coat No. 0 sample, the sputtering device in the vacuum coating equipment presses image 3 The arrangement in the embodiment, that is, one multi-arc target and two magnetron sputtering targets, wherein the target material of the multi-arc target 9 is PrNd alloy, and the target material of the magnetron sputtering targets 20 and 21 is metal Tb. When the equipment is working, the carrying device containing the No. 0 sample passes through the multi-arc target sputtering area and the magnetron sputtering target sputtering area for coating in sequence. Then the No. 0 sample with coating on the surface was sent to the vacuum heat treatment equipment for grain boundary diffusion heat treatment, and the finished rare earth permanent magnet device was made into No. 3 sample.

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Abstract

The invention discloses a rare earth permanent magnetic device with lanthanum and cerium added and a manufacturing method thereof. The rare earth permanent magnet device contains Nd, Pr, La, Ce, Tb, Fe and B; a main phase is provided with an R2T14M structure, a grain boundary phase mainly includes an R-rich item and rare earth oxides, through analyzing from the section of the device, the area ratio of the main phase is 95% or above, and the area ratio of the R-rich item is greater than 0.5%; from the center of the main phase to a grain boundary, the concentration of rare earth Nd or Pr is gradually increased, the R-rich item contains Nd, Pr and Tb, and rare earth elements in the rare earth oxides include La and Ce; the total weight of the rare earth elements, namely Nd, Pr, La and Ce in rare earth permanent magnet device accounts for 28-34% of the total weight of the rare earth permanent magnetic device, the total weight of La and Ce accounts for 3-60% the total weight of rare earth components in the rare earth permanent magnetic device, and the weight of Tb accounts for 5% or below of the total weight of the rare earth components in the rare earth permanent magnet device. Throughthe technology, the device can keep high magnetic performance and heat resistance performance while a part of praseodymium and neodymium in the device are replaced with lanthanum and cerium.

Description

technical field [0001] The invention belongs to the field of rare earth permanent magnet materials, in particular to a rare earth permanent magnet device and a manufacturing method thereof. Background technique [0002] NdFeB rare earth permanent magnet devices are widely used in medical magnetic resonance imaging, automotive parts, consumer electronics, household appliances, high-efficiency motors and other fields. In recent years, with the continuous increase in the total output of NdFeB rare earth permanent magnet devices, the problem of unbalanced use of rare earth metals has also emerged. Traditional NdFeB rare earth permanent magnet devices rely too much on rare earth elements Pr, Nd and heavy rare earth elements Dy, Tb, which makes the crustal reserves of these elements stretched in the face of increasing production demand. The rare earth resources stored in the earth's crust mostly exist in a symbiotic manner, among which lanthanum and cerium elements account for mo...

Claims

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Application Information

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IPC IPC(8): C23C14/56C23C14/35C23C14/34C23C14/16C23C14/58B22F9/02B22F3/10H01F41/02H01F1/057
CPCC23C14/56C23C14/35C23C14/3407C23C14/165C23C14/5806B22F9/023B22F3/1007H01F41/0266H01F41/0293H01F1/0576H01F1/0577
Inventor 孙昊天段永利
Owner SHENYANG GENERAL MAGNETIC