Preparation method of film-coated soft magnetic flaky FeNi alloy

A soft magnetic and flake technology, applied in the field of FeNi alloy, can solve the problems of lower production cost, high electrical conductivity, poor impedance matching, etc., and achieve the effect of lower production cost, high quality factor and good inductance

Active Publication Date: 2020-07-07
LUOYANG INST OF CUTTING EDGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The iron-nickel alloy soft magnetic material prepared by the method has simple equipment, greatly reduced production cost, good inductance, high quality factor, and low power loss value, but its conductivity is too high and impedance matching is poor. Not suitable for applications in high-end wave-absorbing fields that require electromagnetic wave absorption

Method used

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  • Preparation method of film-coated soft magnetic flaky FeNi alloy
  • Preparation method of film-coated soft magnetic flaky FeNi alloy
  • Preparation method of film-coated soft magnetic flaky FeNi alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Stir and mix the purchased FeNi alloy powder, acrylamide (amides), and absolute ethanol evenly and then put them into a ball mill tank for wet milling. Ball mill in a horizontal planetary ball mill with a ball mill speed of 300r / min. For 8h; wherein the content of FeNi alloy powder, acrylamide (amides) and dehydrated alcohol is 200g: 10mL: 800mL respectively, the ball material content of agate beads and FeNi alloy powder is 5: 1, agate beads are made of diameter 10mm, 6mm, 3mm large, medium and small three kinds of agate beads, the mass ratio of the large, medium and small three kinds of agate beads is 2:25:50, and the total weight of the three is 2.5Kg. After the ball milling is completed, the slurry is taken out, heated and dried at 80° C. for 6 hours, and the ball milled powder of the surface-modified FeNi alloy is obtained.

[0025] (2) Add 10 parts of tetraethyl orthosilicate to 40ml of deionized water and 200ml of ethanol solution, then adjust the pH value to ...

Embodiment 2

[0027] (1) Stir and mix the purchased FeNi alloy powder, acrylamide (amides), and absolute ethanol evenly and then put them into a ball mill tank for wet milling. Ball mill in a horizontal planetary ball mill with a ball mill speed of 50r / min. It is 10h; Wherein the content of FeNi alloy powder, acrylamide (amides) and dehydrated alcohol is 300g: 15mL: 900mL respectively, the spherical material content of agate bead and FeNi alloy powder is 6: 1, and agate bead is made of diameter 10mm, 6mm, 3mm large, medium and small three kinds of agate beads, the mass ratio of the large, medium and small three kinds of agate beads is 4:30:50, and the total weight of the three is 2.5Kg. After the ball milling is completed, the slurry is taken out, heated and dried at 80° C. for 6 hours, and the ball milled powder of the surface-modified FeNi alloy is obtained.

[0028] (2) Add 10 parts of tetraethyl orthosilicate to 40ml of deionized water and 200ml of ethanol solution, then adjust the pH v...

Embodiment 3

[0030](1) Stir and mix the purchased FeNi alloy powder, acrylamide (amides), and absolute ethanol evenly and then put them into a ball mill tank for wet milling. Ball mill in a horizontal planetary ball mill with a ball mill speed of 450r / min. 12h; the contents of FeNi alloy powder, acrylamide (amides) and absolute ethanol are respectively 600g: 20mL: 1000mL, and the pH value is adjusted to 8. The ball material content of agate beads and FeNi alloy powder is 8:1. The agate beads are composed of three types of agate beads with diameters of 10mm, 6mm, and 3mm. The mass ratio of the large, medium, and small agate beads is 5: 40:70, the total weight of the three is 2.5Kg. After the ball milling is completed, the slurry is taken out, heated and dried at 80° C. for 6 hours, and the ball milled powder of the surface-modified FeNi alloy is obtained.

[0031] (2) Add 10 parts of tetraethyl orthosilicate to 60ml of deionized water and 300ml of ethanol solution, then adjust the pH value...

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Abstract

The invention provides a preparation method of a film-coated soft magnetic flaky FeNi alloy. The preparation method comprises the following steps that FeNi alloy powder, a surface modifier and absolute ethyl alcohol are put into a ball milling tank for ball milling; after the ball milling is completed, a slurry is taken out and heated and dried, and ball-milled powder of the surface modified FeNialloy is obtained; 10-20 parts of tetraethoxysilane are added into a 200-400ml ethanol solution, and the pH value is adjusted to 8, and a silane treatment solution is obtained; 40-60 parts of ball-milled powder of the surface modified FeNi alloy is added into the silane treatment solution, reaction is carried out for 0.5-5 hours at the water bath temperature of 40-60 DEG C, and the coated flaky FeNi alloy is obtained after cleaning and drying are finished. The manufacturing cost is low, the process is simple, and different comprehensive performance requirements in various industrial fields such as telecommunication, computers and printed circuit boards can be met.

Description

【Technical field】 [0001] The invention relates to the technical field of FeNi alloys, in particular to a method for preparing a soft magnetic FeNi alloy. 【Background technique】 [0002] With the development of science and technology and electronic information, electromagnetic materials play a pivotal role in people's lives, and often require the same magnetic material to have different performances. As a typical soft magnetic material, iron and nickel are used in weak It has good magnetic properties in the magnetic field, with high permeability, large saturation magnetization, and low coercive force; FeNi alloy has a high melting point, high temperature resistance and thermal shock performance are very good, high hardness, Good wear resistance, so FeNi alloys are widely used in wave-absorbing materials, magnetic materials and hard alloys. However, iron-nickel alloys still have problems such as high density, poor acid and alkali resistance, low resistivity, easy skin effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04H01F1/147
CPCB22F9/04H01F1/14716B22F2009/043B22F2009/042B22F1/102
Inventor 刘若鹏赵治亚刘志礼黄赤张运湘南茜王佳佳王侃
Owner LUOYANG INST OF CUTTING EDGE TECH
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