Method for preparing high frequency soft magnetic iron-silicon-aluminum magnetic powder cores

A soft magnet, magnetic powder core technology, applied in magnetic core manufacturing, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problems of rough surface, high magnetic loss, low magnetic permeability, etc.

Active Publication Date: 2018-11-09
SHANDONG KAITONG ELECTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the comprehensive magnetic performance of sendust magnetic powder core is good, it still has the disadvantages of low magnetic permeability, high magnetic loss, and rough surface, which is prone to more cracks.

Method used

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  • Method for preparing high frequency soft magnetic iron-silicon-aluminum magnetic powder cores

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022]Put the sendust in the pulverizer, after mechanical crushing, use a 500-mesh round hole screen to classify, and carry out grading according to the following weight parts, 200 mesh accounts for 15 parts, 325 mesh accounts for 35 parts, and 500 mesh accounts for 75 parts. to obtain graded gold powder; mix graded gold powder and absolute ethanol at a mass ratio of 1:10 and pour it into a three-necked flask. Under the condition of an ultrasonic frequency of 50 kHz, ultrasonically disperse it for 60 minutes, and then add graded gold powder into the three-necked flask. Polyvinylpyrrolidone with 0.8 times the mass of gold powder and dopamine with 0.03 times the mass of graded gold powder were continued to be ultrasonically dispersed at a frequency of 50 kHz for 60 minutes, and then the ultrasonic wave was stopped. Feed nitrogen into the three-necked flask at a high rate, under nitrogen protection, at a temperature of 70°C and a rotation speed of 500r / min, heat and stir at a cons...

example 2

[0024] Put the sendust in the pulverizer, after mechanical crushing, use a 500-mesh round hole screen to classify, and carry out grading according to the following weight parts, 200 mesh accounts for 15 parts, 325 mesh accounts for 35 parts, and 500 mesh accounts for 75 parts. to obtain graded gold powder; mix graded gold powder and absolute ethanol at a mass ratio of 1:10 and pour it into a three-necked flask. Under the condition of an ultrasonic frequency of 50 kHz, ultrasonically disperse it for 60 minutes, and then add graded gold powder into the three-necked flask. Polyvinylpyrrolidone with 0.8 times the mass of gold powder and dopamine with 0.03 times the mass of graded gold powder were continued to be ultrasonically dispersed at a frequency of 50 kHz for 60 minutes, and then the ultrasonic wave was stopped. Nitrogen gas was passed into the three-necked flask at a high rate, under the condition of nitrogen protection, at a temperature of 70°C and a rotation speed of 500r / ...

example 3

[0026] Put the sendust in the pulverizer, after mechanical crushing, use a 500-mesh round hole screen to classify, and carry out grading according to the following weight parts, 200 mesh accounts for 15 parts, 325 mesh accounts for 35 parts, and 500 mesh accounts for 75 parts. to obtain graded gold powder; mix graded gold powder and absolute ethanol at a mass ratio of 1:10 and pour it into a three-necked flask. Under the condition of an ultrasonic frequency of 50 kHz, ultrasonically disperse it for 60 minutes, and then add graded gold powder into the three-necked flask. Polyvinylpyrrolidone with a mass of 0.8 times the gold powder was dispersed ultrasonically for 60 minutes at a frequency of 50 kHz, then the ultrasonic was stopped, and the three-necked flask was moved into a digital display speed measuring constant temperature magnetic stirrer, and nitrogen gas was introduced into the three-necked flask at a rate of 8 mL / min. Under nitrogen protection, at a temperature of 70°C ...

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Abstract

The invention discloses a method for preparing high frequency soft magnetic iron-silicon-aluminum magnetic powder cores, and belongs to the technical field of energy storage materials. Firstly, an iron-silicon-aluminum alloy is crushed by a machine and graded with powder of different particle sizes to prepare graded alloy powder, the graded alloy powder, absolute ethanol, polyvinylpyrrolidone anddopamine are subjected to ultrasound dispersion and reaction under the nitrogen protection to prepare graded alloy powder syrup, then a diluent of ethyl orthosilicate is dropwise added into the gradedgold powder syrup, a catalyst is added after dropwise adding, after stirring and mixing, an ethanol solution is added, a stirring reaction continues, and filtering, washing and drying are then conducted to obtain modified ally powder; the modified alloy powder and an insulating binder are mixed and dried, a release agent is added, injection compression molding is conducted, demolding is conducted, after stabilization treatment and heat treatment, cooling is conducted, and then the high-frequency soft magnetic iron-silicon-aluminum magnetic powder cores are obtained.

Description

technical field [0001] The invention discloses a preparation method of a silicon-aluminum magnetic powder core of a high-frequency soft magnet, belonging to the technical field of energy storage materials. Background technique [0002] As a soft magnetic alloy material with excellent magnetic properties, sendust not only has high hardness, high resistivity, low magnetic anisotropy constant, low coercive force, low hysteresis loss and low eddy current loss, but also has extremely strong Corrosion resistance is also widely used as a structural material. It is a new type of electronic energy-saving material. The sendust magnetic powder core is based on the powder metallurgy process. It is coated with sendust powder through surface insulation and bonded It is a soft magnetic material made by mixing and pressing agents. In recent years, the application of soft magnetic silicon aluminum powder and its magnetic powder core products in the electronics industry has received great at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/147B22F1/00
CPCH01F1/14791H01F41/0206H01F41/0246B22F1/102
Inventor 郭跃许玉吴庆梅
Owner SHANDONG KAITONG ELECTRON
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