Preparing method of amorphous meal soft magnetic powder core

An amorphous metal, magnetic powder core technology, applied in the direction of magnetic materials, magnetic objects, inorganic materials, etc., can solve the problems of lower yield, core fracture, increase in core cost, etc., to reduce coercive force and loss. , The effect of reducing core loss and improving soft magnetic performance

Active Publication Date: 2015-09-30
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "A Preparation Method for Amorphous Metal Soft Magnetic Powder Core", Patent No. CN104190945A, introduces a preparation technology for amorphous magnetic powder core, which adopts isostatic pressing technology to improve the density of the magnetic core, thereby There are some defects in this method to improve the magnetic permeability of the magnetic core. On the one hand, before the heat treatment of the amorphous magnetic powder core, the strength of the magnetic core is low because the binder has not been cured. rate; on the other hand, isostatic pressing requires a soft sheath, which increases the cost, is not suitable for mass production, and limits the use
[0004] The Chines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] Will Fe 78 Si 9 B 13 The amorphous strip is embrittled, the embrittlement temperature is 200 degrees, and the embrittlement time is 200 minutes; the embrittled amorphous strip is first crushed with a crusher, and then crushed by jet mill to obtain amorphous metal powder ; Sieving the amorphous metal powder and proceeding to the particle size ratio, +150 mesh accounted for 5%, -150-+200 mesh accounted for 70%, -200-+300 mesh accounted for 25%; the proportioned amorphous powder For passivation treatment, the passivation agent used is phosphoric acid acetone solution, in which the phosphoric acid content is 0.1% of the amount of magnetic powder, and the acetone content is 2% of the amount of magnetic powder; the amorphous powder passivated by phosphoric acid is insulated and coated, and the coating agent Kaolin, talcum powder, glass powder, B 2 O 3 , Al 2 O 3 , One or more of MgO, particle size -600 mesh, adding amount is 0.1wt% of the weight of amorphous ...

Example Embodiment

[0032] Example 2:

[0033] Will Fe 79 Si 7 B 14 The amorphous strip is embrittled, the embrittlement temperature is 400 degrees, and the embrittlement time is 10 minutes; the embrittled amorphous strip is first crushed with a crusher, and then crushed by jet mill to obtain amorphous metal powder ;Sieving the amorphous metal powder and proceeding to the particle size ratio, +150 mesh accounted for 30%, -150-+200 mesh accounted for 40%, -200-+300 mesh accounted for 30%; the proportioned amorphous powder For passivation treatment, the passivation agent used is phosphoric acid acetone solution, in which the phosphoric acid content is 3% of the amount of magnetic powder, and the acetone content is 10% of the amount of magnetic powder; the amorphous powder passivated by phosphoric acid is insulated and coated, and the coating agent Kaolin, talcum powder, glass powder, B 2 O 3 , Al 2 O 3 One or more of MgO, the particle size is -600 mesh, and the addition amount is 2wt%; one or more of ...

Example Embodiment

[0036] Example 3:

[0037] Will Fe 80 Si 9 B 11 The amorphous strip is embrittled, the embrittlement temperature is 350 degrees, and the embrittlement time is 30 minutes; the embrittled amorphous strip is first crushed with a crusher, and then crushed with a jet mill to obtain amorphous metal powder ; Sieve the amorphous metal powder and carry out the particle size ratio, +150 mesh accounted for 10%, -150-+200 mesh accounted for 70%, -200-+300 mesh accounted for 20%; the proportioned amorphous powder For passivation treatment, the passivation agent used is phosphoric acid acetone solution, in which the phosphoric acid content is 0.8% of the magnetic powder content, and the acetone content is 8% of the magnetic powder content; the amorphous powder passivated by phosphoric acid is insulated and coated, and the coating agent Kaolin, talcum powder, glass powder, B 2 O 3 , Al 2 O 3 One or more of MgO, the particle size is -600 mesh, and the added amount is 1.5wt%; one or more of epoxy...

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Abstract

The invention discloses a preparing method of an amorphous meal soft magnetic powder core. The preparing method includes the steps of 1, embrittling an amorphous strip, and crushing the amorphous strip embrittled to obtain amorphous metal powder; 2, screening the amorphous metal powder, and performing particle size matching; 3, subjecting the matched amorphous metal powder to passivation; 4, subjecting the amorphous metal powder, passivated by phosphoric acid, to insulation coating; 5, adding binder, and granulating the amorphous metal powder coated; 6, subjecting the granulated amorphous metal powder to magnetic field orientation forming; 7, subjecting a magnetic core, subjected to orientation forming, to axial magnetic thermal treatment; and 8, cooling the magnetic core, subjected to axial magnetic thermal treatment, and performing spraying to obtain a product. The preparing method has the advantages that magnetic domain forms in the amorphous magnetic core, coercive force and loss are lowered, magnetic core loss is further reduced, magnetic conductivity is improved, soft magnetic property of the amorphous magnetic core is improved, and the cost is lowered.

Description

technical field [0001] The invention relates to the technical field related to the preparation of metal magnetic powder cores, in particular to a preparation method of an amorphous metal soft magnetic magnetic powder core. Background technique [0002] Metal magnetic powder core is a new type of soft magnetic material after silicon steel, ferrite, and amorphous strip, and is widely used in power electronic devices. Traditional metal magnetic powder cores mainly include iron powder cores, sendust, iron silicon, iron nickel molybdenum, iron nickel, etc., but they have their own shortcomings, such as poor superposition performance of sendust, poor loss performance of iron powder cores, iron nickel And iron-nickel-molybdenum has better performance, but its composition contains a higher proportion of nickel, which requires higher manufacturing costs. Therefore, it is necessary to develop a magnetic powder core with lower cost and better performance. Amorphous magnetic powder cor...

Claims

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Application Information

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IPC IPC(8): H01F1/153H01F1/22
Inventor 张章明
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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