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Preparation method of permanent magnet for transformer

A technology of permanent magnets and transformers, applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve problems such as insufficient magnetic properties, and achieve the effect of improving magnetic performance and corrosion resistance

Inactive Publication Date: 2018-06-01
程桂平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the permanent magnets used in transformers are mainly NdFeB permanent magnets, which generally have the problem of insufficient magnetic properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] A preparation method for a permanent magnet for a transformer, the steps are as follows: Weigh the following powders in parts by weight: 11 parts of neodymium, 50 parts of iron, 3 parts of boron, 1 part of rhodium, 1 part of palladium, 1 part of silver, 1 part of cerium, 2 parts of praseodymium, 3 parts of promethium, 1 part of samarium, 2 parts of europium, 3 parts of gadolinium, 1 part of dysprosium, 2 parts of holmium, mixed evenly to obtain a mixed powder, after drying the mixed powder in a vacuum oven, in argon atmosphere Under protection, the mixed powder is fully ball-milled and mixed with a high-energy ball mill, and then under a pressure of 20 MPa, the ball-milled mixed powder is hot-pressed and sintered at 550°C for 30 minutes, and then cooled in a furnace to obtain a permanent magnet for a transformer.

Embodiment 2

[0008] A preparation method for a permanent magnet for a transformer, the steps are as follows: Weigh the following powders in parts by weight: 12 parts of neodymium, 50 parts of iron, 3 parts of boron, 1 part of rhodium, 1 part of palladium, 1 part of silver, 1 part of cerium, 2 parts of praseodymium, 3 parts of promethium, 1 part of samarium, 2 parts of europium, 3 parts of gadolinium, 1 part of dysprosium, 2 parts of holmium, mixed evenly to obtain a mixed powder, after drying the mixed powder in a vacuum oven, in argon atmosphere Under protection, the mixed powder is fully ball-milled and mixed with a high-energy ball mill, and then under a pressure of 20 MPa, the ball-milled mixed powder is hot-pressed and sintered at 550°C for 30 minutes, and then cooled in a furnace to obtain a permanent magnet for a transformer.

Embodiment 3

[0010] A preparation method for a permanent magnet for a transformer, the steps are as follows: Weigh the following powders in parts by weight: 13 parts of neodymium, 50 parts of iron, 3 parts of boron, 1 part of rhodium, 1 part of palladium, 1 part of silver, 1 part of cerium, 2 parts of praseodymium, 3 parts of promethium, 1 part of samarium, 2 parts of europium, 3 parts of gadolinium, 1 part of dysprosium, 2 parts of holmium, mixed evenly to obtain a mixed powder, after drying the mixed powder in a vacuum oven, in argon atmosphere Under protection, the mixed powder is fully ball-milled and mixed with a high-energy ball mill, and then under a pressure of 20 MPa, the ball-milled mixed powder is hot-pressed and sintered at 550°C for 30 minutes, and then cooled in a furnace to obtain a permanent magnet for a transformer.

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Abstract

A preparation method of a permanent magnet for a transformer comprises the following steps that powder, by weight, of 11 parts of neodymium, 50 parts of ferrum, 3 parts of boron, 1 part of rhodium, 1part of palladium, 1 part of argentum, 1 part of cerium, 1 part of praseodymium, 1 part of promethium, 1 part of samarium, 2 parts of europium, 3 parts of gadolinium, 1 part of dysprosium and 2 partsof holmium is weighed and mixed uniformly to obtain mixed powder, after the mixed powder is placed in a vacuum drying oven and dried, under the protection of argon, the mixed powder is fully ball-milled and mixed by a high-energy ball mill, then under the 20 MPa pressure, the ball-milled mixed powder is subjected to hot pressed sintering for 30 min at the temperature of 550 DEG C and then cooled with the stove, and the permanent magnet for the transformer is obtained.

Description

technical field [0001] A method for preparing a permanent magnet for a transformer. Background technique [0002] In the prior art, permanent magnets for transformers are mainly neodymium-iron-boron permanent magnets, and there is generally a problem of insufficient magnetic properties. Contents of the invention [0003] The invention provides a method for preparing a permanent magnet for a transformer. The steps are as follows: Weigh the following powders in parts by weight: 11 parts of neodymium, 50 parts of iron, 3 parts of boron, 1 part of rhodium, 1 part of palladium, 1 part of silver, 1 part of 1 part of cerium, 2 parts of praseodymium, 3 parts of promethium, 1 part of samarium, 2 parts of europium, 3 parts of gadolinium, 1 part of dysprosium, 2 parts of holmium, and mix uniformly to obtain a mixed powder. After the mixed powder is placed in a vacuum drying oven and dried, the Under the protection of argon, the mixed powder is fully ball-milled and mixed with a high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02C22C38/00C22C33/02
CPCH01F1/0577C22C33/0278C22C38/002C22C38/005H01F41/0253H01F41/0266
Inventor 程桂平
Owner 程桂平
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