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Preparation method of iron-based amorphous magnetic powder core with ultrahigh magnetic permeability

An iron-based amorphous and magnetic powder core technology, which is applied in the direction of magnetic materials, magnetic objects, and inorganic materials, can solve the problems of large particle gaps, difficulty in pressing and molding, and failure to meet the requirements of motors, and achieve uniform composition.

Active Publication Date: 2016-07-06
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] But there is following defect in the method for above-mentioned preparation magnetic powder core: 1, the magnetic permeability of the obtained amorphous magnetic powder core is 90, still lower, can not satisfy the service requirement of motor; Large, the gap between the particles is large, it is difficult to press into shape
[0008] In summary, there is no report on the amorphous magnetic powder core with a magnetic permeability of more than 200 and its preparation method in the prior art; there is no report in the prior art that can effectively solve the problem of large-particle amorphous powder compression molding

Method used

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Embodiment 1

[0029] The preparation method of the iron-based amorphous magnetic powder core with ultra-high magnetic permeability provided in this embodiment includes the following steps:

[0030] Step 1, for the Fe produced by ultra-rapid solidification technology 78 Si 9 B 13 The iron-based amorphous strip is heat-treated at 400-500°C for 3 hours to make it brittle and easy to crush;

[0031] Step 2, pulverizing the brittle iron-based amorphous ribbon to obtain iron-based amorphous powder;

[0032] Step 3, sieving and proportioning the iron-based amorphous powder, and then mixing it into a coarse powder with a weight content of 40-70% passing through -20~+70 mesh and a weight content of 30-60% passing through - Mixed powders consisting of fine powders of 400 mesh;

[0033] Step 4, using a passivator, a coupling agent, an insulating agent, a binder, and a lubricant to carry out passivation, coupling, insulation coating, and lubrication treatment on the mixed powder in sequence, and th...

Embodiment 2

[0046] The preparation method of the iron-based amorphous magnetic powder core with ultra-high magnetic permeability provided in this embodiment includes the following steps:

[0047] Step 1, for the Fe produced by ultra-rapid solidification technology 78 Si 9 B 13 The iron-based amorphous strip is heat-treated at 400-500°C for 3 hours to make it brittle and easy to crush;

[0048] Step 2, pulverizing the brittle iron-based amorphous ribbon to obtain iron-based amorphous powder;

[0049] Step 3, sieving and proportioning the iron-based amorphous powder, and then mixing it into coarse powder with a weight content of 65% passing through -20~+70 mesh and a weight content of 35% passing through -400 mesh Mixed powder composed of fine powder;

[0050] Step 4, using a passivator, a coupling agent, an insulating agent, a binder, and a lubricant to carry out passivation, coupling, insulation coating, and lubrication treatment on the mixed powder in sequence, and then press molding...

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Abstract

The invention belongs to the technical field of alloyed soft magnetic powder core and particularly relates to a preparation method for an iron-based amorphous magnetic powder core with ultrahigh magnetic conductivity. The preparation method includes the steps of 1), subjecting an iron-based amorphous thin belt to heat treatment; 2), smashing the iron-based amorphous thin belt to obtain iron-based amorphous powder; 3), subjecting the iron-based amorphous powder to screening and matching, and then mixing the same to mixed powder containing coarse powder and fine powder; 4), subjecting the mixed powder to passivating, coupling, insulation coating and lubricating treatment in sequence by adopting passivator, coupling agents, insulating compounds, binding agents and lubricating agents, and then pressing for forming; 5), subjected the formed magnetic powder to annealing treatment and spraying insulation treatment in sequence. By the method of mixing and coupling treatment upon the coarse powder and the fine powder, the problem about pressing large-particle amorphous powder for forming can be effectively solved, and the iron-based amorphous magnetic powder core with the ultrahigh magnetic conductivity more than 200 can be prepared.

Description

technical field [0001] The invention belongs to the technical field of alloy soft magnetic powder cores, and in particular relates to a preparation method of an iron-based amorphous magnetic powder core with ultrahigh magnetic permeability. Background technique [0002] With the development of the electronics industry, a large number of applications of various switching power supplies require a magnetic powder core with high magnetic permeability, low loss, and good AC-DC superposition performance at a frequency of 10kHz-200kHz to make an inductor core, which is generally made of sendust aluminum alloy. The iron core is also called alloy magnetic powder core, and its relative magnetic permeability does not exceed 200. For example, the Chinese invention patent application CN101090019A "Manufacturing method of high magnetic permeability FeSiAl magnetic powder core" discloses a FeSiAl magnetic powder with a magnetic permeability of 150. Core manufacturing method. [0003] Amor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153H01F1/22C22C45/02B22F1/02B22F3/16
Inventor 王亚娜江志滨纪杰李维强
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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