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Adhesive, granulation method of soft magnetic composite powder and soft magnetic composite powder

A soft magnetic compounding and adhesive technology, which is applied in the fields of inorganic material magnetism, metal processing equipment, transportation and packaging, etc., can solve the problems of inability to continuously produce and easily damage the insulating layer of magnetic powder, and achieve low molding pressure and good flow performance. , to ensure the effect of consistency

Inactive Publication Date: 2019-09-20
HEFEI ECRIEE TAMURA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the traditional granulation method cannot produce continuously, and the insulating layer on the surface of the magnetic powder is easily damaged during the granulation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The granulation method of the soft magnetic composite powder described in the present embodiment comprises the following steps:

[0032] (1) Pretreatment: Weigh 5000g of iron silicon chromium alloy powder (FeCrSi-A), 40g of aluminum dihydrogen phosphate, and 600g of distilled water, dissolve the aluminum dihydrogen phosphate in distilled water, and then add the iron silicon chromium Alloy powder, then put the mixture in a double planetary mixer, stir at 105°C for 50min, and at the same time ventilate until dry; then take out the powder;

[0033] (2) Preparation of adhesive: take respectively cyanate ester modified epoxy resin 45g, methyl nadic anhydride 60g, 4-cycloethylene-1,2-dimethyl 2-carboxylate 45g and acetone 1250g, the cyanic acid Grease-modified epoxy resin, methyl nadic acid anhydride, 4-cycloethylene-1,2-dicarboxylic acid dimethyl ester are dissolved in the acetone;

[0034] (3) Prepare the original slurry: add the powder obtained in step (1) to the adhesive...

Embodiment 2

[0043] The granulation method of the soft magnetic composite powder described in the present embodiment comprises the following steps:

[0044] (1) Pretreatment: Weigh 5000g of carbonyl iron powder, 50g of aluminum dihydrogen phosphate, and 1000g of distilled water, dissolve the aluminum dihydrogen phosphate in distilled water, add the iron-silicon-chromium alloy powder thereto, and then place the mixture In a double planetary mixer, stir at 110°C for 55 minutes, while ventilating until dry; then take out the powder;

[0045] (2) Preparation of adhesive: Weigh respectively 48g of cyanate ester modified epoxy resin, 64g of methyl nadic anhydride, 48g of dimethyl 4-cycloethylene-1,2-dicarboxylate and 1500g of acetone, and Grease-modified epoxy resin, methyl nadic acid anhydride, 4-cycloethylene-1,2-dicarboxylic acid dimethyl ester are dissolved in the acetone;

[0046] (3) Prepare the original slurry: add the powder obtained in step (1) to the adhesive obtained in step (2), and p...

Embodiment 3

[0053] The granulation method of the soft magnetic composite powder described in the present embodiment comprises the following steps:

[0054] (1) Pretreatment: Weigh 2500g of carbonyl iron powder, 2500g of sendust aluminum powder and mix evenly, 25g of aluminum dihydrogen phosphate and 500g of distilled water, dissolve the aluminum dihydrogen phosphate in distilled water, and then add the iron Silicon-chromium alloy powder, then put the mixture in a double planetary mixer, stir for 50min at 100°C, and at the same time ventilate until dry; then take out the powder;

[0055] (2) Preparation of adhesive: Weigh respectively 37.5g of cyanate ester modified epoxy resin, 50g of methyl nadic acid anhydride, 37.5g of dimethyl 4-cycloethylene-1,2-dicarboxylate and 1250g of acetone. Cyanate-modified epoxy resin, methyl nadic anhydride, 4-cycloethylene-1,2-dicarboxylic acid dimethyl ester are dissolved in the acetone;

[0056] (3) Prepare the original slurry: add the powder obtained in...

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PUM

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Abstract

The invention relates to an adhesive, a granulation method of a soft magnetic composite powder and a soft magnetic composite powder. The adhesive is prepared by dissolving a adhesive material in acetone, wherein the adhesive material comprises cyanate ester modified epoxy resin, methyl nadic anhydride and 4-cycloethylene-1,2- dimethyl diformate having a mass ratio of (2.5-3.5): (3.5-4.5):(2.5-3.5), wherein the mass ratio of the adhesive material to acetone is 1:10. The soft magnetic composite powder obtained by combining the adhesive and fluidized bed granulation has high apparent density, good fluidity, can be continuously produced, and can ensure the consistency of the granulating powders, avoids waste in granulation processes, and achieves 100% yield.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal soft magnetic powder materials, and in particular relates to an adhesive, a granulation method of soft magnetic composite powder and soft magnetic composite powder. Background technique [0002] The molded inductor includes a base body and a winding body, which is formed by die-casting the base body by embedding the winding body inside the metal magnetic powder. The magnetic powder includes carbonyl iron powder, sendust powder, sendust powder, etc., and the particle size of the split is about 10um. The small magnetic components are easy to agglomerate and stack during storage, and there will be problems of dust flying and adhesion to the wall when pressing the molded inductor. At the same time, the quantitative feeding production cannot be carried out because the powder is dry and has no fluidity; in addition, During the use of the molded inductance device, its loss (mainly eddy curr...

Claims

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Application Information

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IPC IPC(8): H01F1/22B22F1/00
CPCH01F1/22B22F1/102B22F1/103
Inventor 李伟健李媛媛刘国安方超万静龙张德光
Owner HEFEI ECRIEE TAMURA ELECTRIC