Spheroidizing preparation method of crushed Fe-Si-Al magnetic powder particles

An iron-silicon-aluminum, spheroidization technology, applied in the manufacture of inductors/transformers/magnets, magnetic materials, magnetic objects, etc., can solve the problems of low DC bias performance, low pressing density, high production cost, and achieve high sphericity, The effect of eliminating internal stress and good fluidity

Active Publication Date: 2022-01-14
安徽瑞德磁电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problems of high production cost by gas atomization method, irregular shape of powder produced by ball mill crushing method, low compaction densi...

Method used

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  • Spheroidizing preparation method of crushed Fe-Si-Al magnetic powder particles
  • Spheroidizing preparation method of crushed Fe-Si-Al magnetic powder particles
  • Spheroidizing preparation method of crushed Fe-Si-Al magnetic powder particles

Examples

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Effect test

Embodiment 1

[0024] A kind of spheroidization preparation operation steps of crushed sendust magnetic powder particles are as follows:

[0025] (1) Put conventional crushed sendust magnetic powder into acetone solution, ultrasonically clean it for 10 minutes, and dry it at 40°C to obtain clean magnetic powder. The purpose is to remove the oil and impurities adsorbed on the surface of the magnetic powder.

[0026] (2) Add 100 g of clean magnetic powder into an aqueous solution of nitric acid with a mass concentration of 31 wt.%. In order to prevent the particles of clean magnetic powder from sticking to each other, perform ultrasonic treatment for 7 minutes. During ultrasonication, 10 ml of distilled water was added dropwise to the mixed solution every 3 minutes for dilution, and the number of drops was 2 times. Then the magnetic powder was filtered out, washed with ethanol for 3 times, and dried at 50° C. to obtain the acidified magnetic powder.

[0027] (3) Put the acidified magnetic po...

Embodiment 2

[0031] A kind of spheroidization preparation operation steps of crushed sendust magnetic powder particles are as follows:

[0032] (1) Put conventional crushed sendust magnetic powder into acetone solution, ultrasonically clean it for 15 minutes, and dry it at 50°C to obtain clean magnetic powder. The purpose is to remove the oil and impurities adsorbed on the surface of the magnetic powder.

[0033] (2) Add 300 g of clean magnetic powder into an aqueous solution of nitric acid with a mass concentration of 42 wt.%. In order to prevent the particles of the clean magnetic powder from sticking to each other, perform ultrasonic treatment for 10 minutes. During ultrasonication, 15 ml of distilled water was added dropwise to the mixed solution every 3 minutes to dilute the nitric acid solution, and the number of drops was 3 times. Then the magnetic powder was filtered out, washed with ethanol for 3 times, and dried at 60°C to obtain the acidified magnetic powder.

[0034] (3) Put ...

Embodiment 3

[0038] A kind of spheroidization preparation operation steps of crushed sendust magnetic powder particles are as follows:

[0039] (1) Put conventional crushed sendust magnetic powder into acetone solution, ultrasonically clean it for 20 minutes, and dry it at 60°C to obtain clean magnetic powder. The purpose is to remove the oil and impurities adsorbed on the surface of the magnetic powder.

[0040] (2) Add 500 g of clean magnetic powder into an aqueous solution of nitric acid with a mass concentration of 48 wt.%. In order to prevent the particles of clean magnetic powder from sticking to each other, perform ultrasonic treatment for 15 minutes. During ultrasonication, 20 ml of distilled water was added dropwise to the mixed solution every 3 minutes to dilute the nitric acid solution, and the number of drops was 4 times. Then the magnetic powder was filtered out, washed with ethanol for 4 times, and dried at 80° C. to obtain the acidified magnetic powder.

[0041] (3) Put th...

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Abstract

The invention discloses a spheroidizing preparation method of crushed Fe-Si-Al magnetic powder, which belongs to the technical field of preparation of metal powder. The preparation method comprises the following operation steps of 1, carrying out ultrasonic cleaning on crushed Fe-Si-Al magnetic powder in an acetone solution, 2, adding the cleaned magnetic powder into a nitric acid aqueous solution for ultrasonic treatment, 3, carrying out sanding treatment on the acidified magnetic powder in a sand mill by adopting mixed zirconia grinding balls with three diameters, and 4, carrying out annealing treatment to obtain the spherical Fe-Si-Al magnetic powder with the median particle diameter of 40-70 microns. The tap density reaches 3.50 to 3.98 g/cm<3>. Compared with a common broken Fe-Si-Al powder core, the powder core prepared from the Fe-Si-Al magnetic powder as a raw material has the advantages that when the relative magnetic conductivity is 59.82-60.15, the density of the powder core reaches 5.90-6.02 g/cm<3>, meanwhile, the direct current bias performance of 100Oe reaches up to 52.85-55.73%, and the magnetic core loss of 50kHz/100mT is only 232.94-248.31 mW/cm<3>.

Description

technical field [0001] The invention belongs to the technical field of metal powder preparation, and in particular relates to a preparation method for spheroidizing crushed sendust magnetic powder particles. Background technique [0002] Metal soft magnetic powder cores are widely used in the power electronics industry, among which, in the civilian field, sendust metal soft magnetic powder cores are used in the largest amount. In industrial production, the preparation methods of sendust magnetic powder are mainly divided into two types, one is the gas atomization method, and the prepared magnetic powder is called gas atomized sendust magnetic powder, and the other is the ball milling method, and the prepared The magnetic powder is called crushed sendust magnetic powder. The shape of the magnetic powder produced by the gas atomization method is spherical, the surface is smooth without edges and corners, and the fluidity is good. The powder core made has high compaction densi...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/147H01F1/20
CPCH01F41/02H01F1/14791H01F1/20Y02P10/20
Inventor 徐涛涛张博玮冯松松张鑫邹中秋仝西川马剑
Owner 安徽瑞德磁电科技有限公司
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