Method of preparing iron silicon aluminum magnetic powder core with magnetic-conductivity [Mu] of 26

A manufacturing method, sendust powder technology, applied in the direction of inductance/transformer/magnet manufacturing, magnetic core/yoke, inorganic material magnetism, etc., can solve the problem of undeveloped ideal products, manufacturing method of sendust magnetic powder core Technical difficulty and other issues, to achieve the effect of good DC bias magnetic field performance, excellent frequency characteristics, low core loss

Inactive Publication Date: 2008-07-23
祁峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The manufacturing method of sendust magnetic powder core with magnetic permeability μ = 26 is technically difficult, and ideal products have not yet been developed at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The manufacturing method of the sendust magnetic powder core with magnetic permeability μ=26 is as follows:

[0022] First take an appropriate amount of sendust powder, which contains 4% Si, 12% Al and the rest of Fe, and carry out 5 times of high-speed crushing, with a particle size of -400 mesh; roast the crushed sendust powder , when the temperature reaches 50°C, add a passivating agent. The passivating agent is a medium-strong acid, such as phosphoric acid, diluted 20 times, and the amount added is 16ml per kg of sendust. When it reaches 350℃, add silicone grease and insulating agent. The silicone grease can be sodium metasilicate, and the insulating agent can be ceramic powder. The added sodium metasilicate and ceramic powder are ultrasonically crushed for 30 minutes, and diluted with alcohol. agent, the addition of sodium metasilicate is 32g per kg of sendust, the addition of ceramic powder is 16g per kg of sendust, continue to roast until dry, and add 1 % binder...

Embodiment 2

[0024] The manufacturing method of the sendust magnetic powder core with magnetic permeability μ=26 is as follows:

[0025] First take an appropriate amount of sendust powder, which contains 9% Si, 6% Al and the rest of Fe, and carry out 5 times of high-speed crushing, with a particle size of -800 mesh; roast the crushed sendust powder , when the temperature reaches 80°C, add a passivating agent. The passivating agent is a medium-strong acid, such as phosphoric acid, diluted 30 times, and the amount added is 60ml per kg of sendust. When it reaches 300℃, add silicone grease and insulating agent. The silicone grease can be sodium metasilicate, and the insulating agent can be ceramic powder. The added sodium metasilicate and ceramic powder are ultrasonically crushed for 180 minutes, and diluted with alcohol The addition amount of sodium metasilicate is 10g per kg sendust powder, the addition amount of ceramic powder is 50g per kg sendust powder, continue to roast until dry, and a...

Embodiment 3

[0027] The manufacturing method of the sendust magnetic powder core with magnetic permeability μ=26 is as follows:

[0028] First take an appropriate amount of sendust powder, which contains 6% Si, 9% Al and the rest of Fe, and carry out 5 times of high-speed crushing, with a particle size of -600 mesh; roast the crushed sendust powder , when the temperature reaches 50°C, add a passivating agent. The passivating agent is a medium-strong acid, such as phosphoric acid, diluted 25 times, and the amount added is 40ml per kg of sendust. When it reaches 300℃, add silicone grease and insulating agent. The silicone grease can be sodium metasilicate, and the insulating agent can be ceramic powder. The added sodium metasilicate and ceramic powder are ultrasonically crushed for 100 minutes, and diluted with alcohol agent, the addition of sodium metasilicate is 15g per kg of sendust, the addition of ceramic powder is 18g per kg of sendus, continue to roast until dry, and add 8 % binder, ...

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Abstract

The invention provides a process for preparing sendust cores with magnetic permeability of Mu=26, which comprises steps of a) taking proper sendust for disintegrating at high speed, b) adding passivant when roasting to a temperature of 30DEG C-80DEG C, adding silicone grease and insulating compound when roasting to a temperature of 200DEG C-400DEG C, then continuing roasting till being dried, c) granulating, namely adding binder of 1-12% in powder mixture prepared via step b), screening after grinding up to obtain grain size of 60-150 meshes, d) adding lubricating agent, e) press-forming, f) heat processing to obtain targeted products. The invent has the advantages that 1 production cost is largely reduced by employing sendust with low price, 2 the method of disintegrating at high speed is employed, which enables the powder after being press-formed has perfect frequency characteristic, inductance property and high quality factor, and 3) the prepared magnetic powder cores with magnetic permeability of 26 Mu has lower iron core loss and perfect direct current bias field performance.

Description

technical field [0001] The invention belongs to the field of manufacturing soft magnetic materials, in particular to a method for manufacturing sendust magnetic powder cores with a magnetic permeability μ=26. Background technique [0002] In the world, the sendust magnetic powder core is called Sendust magnetic powder core or Koolmu magnetic powder core, and in my country it is called FeSiAl magnetic powder core. There are five types of magnetic powder cores: μ=26, 60, 75, 90, and 125. FeSiAl magnetic powder core is rapidly rising in my country in recent years. Now FeSiAl magnetic powder core is developing faster than any magnetic material. This is a new high-tech electronic energy-saving material, which can save 80% energy than iron powder core. It is a new type of electronic energy-saving material in China. With the reform of energy technology, energy conservation, conservation, and sustainable development of resources are important parts of national development. In the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/22B22F3/00H01F41/02H01F3/00
Inventor 祁峰姚中祁关泉
Owner 祁峰
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