Soft magnetic composite material with high saturation magnetic flux density and high strength and preparation method thereof

A soft magnetic composite material and magnetic flux density technology, applied in the fields of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of unstable electromagnetic performance, poor process repeatability, and deviation of soft magnetic composite materials , to meet the requirements of use, high magnetic flux density, reduce the effect of forming stress

Active Publication Date: 2019-09-24
山东精创磁电产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology needs to control the pH value of the reaction in the solution, the process is complicated and there are deviations, and the process repeatability is poor. The electromagnetic properties of the soft magnetic composite material prepared by this method are unstable.

Method used

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  • Soft magnetic composite material with high saturation magnetic flux density and high strength and preparation method thereof
  • Soft magnetic composite material with high saturation magnetic flux density and high strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing a high saturation magnetic flux density, high-strength soft magnetic composite material, comprising the following steps:

[0030] Step 1: Take Laiwu water atomized iron powder (iron powder particle size 80-200um, iron powder purity > 99.0%), add 100 grams to 1000 ml acetone;

[0031] Step 2: Add 10 ml of 1wt% orthophosphoric acid to the solution in step 1, and mechanically stir for 30 minutes; evaporate to dryness at 70-90°C for 2 hours, and pass through a 80-mesh sieve to obtain coated powder;

[0032] Step 3: put the above-mentioned coating powder and 0.1 g of calcium carbonate into a ball mill and mill for 20 minutes to obtain double-coated insulation-coated iron powder;

[0033] Step 4: Add 0.2 g of zinc stearate to the above-mentioned insulating coated iron powder and mix evenly;

[0034] Step 5: Heat the mold to 120°C, add the mixture in step 4 to the mold, press with 1000MPa pressure, and lubricate the mold wall;

[0035] Step 6: Place th...

Embodiment 2

[0037] A method for preparing a high saturation magnetic flux density, high-strength soft magnetic composite material, comprising the following steps:

[0038] Step 1: Take ABC100.30 (iron powder particle size 80-200um, iron powder purity > 99.0%), add 100 grams into 1000 ml acetone;

[0039] Step 2: Add 10 ml of 2wt% orthophosphoric acid to the solution in step 1, and mechanically stir for 30 minutes; evaporate to dryness at 70-90°C for 2 hours, and pass through a 80-mesh sieve to obtain coated powder;

[0040] Step 3: put the above-mentioned coating powder and 0.3 g of calcium carbonate into a ball mill and mill for 20 minutes to obtain double-coated insulation-coated iron powder;

[0041] Step 4: Add the above insulating coated iron powder to 0.4 g of amide wax and mix evenly;

[0042] Step 5: Heat the mold to 120°C, add the mixture of step 4 into the mold, press with 800MPa pressure, and lubricate the mold wall to form;

[0043] Step 6: Place the pressed magnetic ring in...

Embodiment 3

[0045] A method for preparing a high saturation magnetic flux density, high-strength soft magnetic composite material, comprising the following steps:

[0046] Step 1: Take reduced iron powder (iron powder particle size 80-200um, iron powder purity > 99.0%), add 100 grams into 1000 ml of acetone;

[0047] Step 2: Add 10 ml of 5wt% orthophosphoric acid to the solution in step 1, and mechanically stir for 30 minutes;

[0048] Step 2: Add 10 ml of 5wt% orthophosphoric acid to the solution in step 1, and mechanically stir for 30 minutes; evaporate to dryness at 70-90°C for 2 hours, and pass through a 80-mesh sieve to obtain coated powder;

[0049] Step 3: put the above-mentioned coating powder and 0.6 g of calcium carbonate into a ball mill and mill for 20 minutes to obtain double-coated insulating-coated iron powder;

[0050] Step 4: Add the above insulating coated iron powder to 0.6 g of amide wax and mix evenly;

[0051] Step 5: Heat the mold to 80°C, add the mixture of step ...

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Abstract

The invention relates to a soft magnetic composite material with high saturation magnetic flux density and high strength and a preparation method thereof, and belongs to the technical field of soft magnetic composite material preparation. The method comprises the following steps: 1, carrying out phosphating treatment on iron powder; 2, washing, filtering and drying the powder, and then obtaining coated powder through screening; 3, mixing the coated powder with calcium carbonate through mechanical ball milling; 4, premixing the coated iron powder obtained at step 3 with a lubricant; 5, heating a mold, and adding the mixture obtained at step 4 for compression molding; 6, placing a pressed magnetic ring in a vacuum sintering furnace for nitrogen atmosphere annealing heat treatment. The warm-pressing molding of the insulated coated powder is performed through the heating of the mold, thereby effectively reducing the friction force between the powder; and then the residual stress of the material is removed through annealing heat treatment, so the composite material is obtained and the use requirements under complex stress conditions are met.

Description

technical field [0001] The invention relates to the technical field of soft magnetic composite materials, and specifically provides a soft magnetic composite material with high saturation magnetic flux density and high strength and a preparation method thereof. Background technique [0002] Soft magnetic composite materials refer to a type of soft magnetic material that coats the surface of soft magnetic particles with an insulating layer to make the particles independent of each other. The outstanding advantage of this kind of soft magnetic material is that it has low iron loss and three-dimensional isotropic magnetic properties under AC magnetic field. It can prepare many components that are difficult to realize with conventional soft magnetic materials. It has been applied in switched reluctance, resonant inductor, anti-lock brake Brake sensors, electromagnetic drives, brushless DC motors, rotating machinery, filters and other fields. [0003] The preparation process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F41/00H01F1/24
CPCH01F1/24H01F41/00H01F41/02
Inventor 邵国庆梁丽萍郭文英张强吴玉明
Owner 山东精创磁电产业技术研究院有限公司
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