A preparation method of a modified iron-silicon-boron soft magnetic powder core with a magnetic permeability of 75

A technology of soft magnetic powder core and iron-silicon-boron, which is applied in the field of preparation of modified iron-silicon-boron soft magnetic powder core, to achieve the effects of reducing noise, improving high-frequency characteristics, and high-frequency magnetic permeability

Active Publication Date: 2016-01-20
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the object of the present invention is to provide a method for preparing a modified iron-silicon-boron soft magnetic powder core with a magnetic permeability of 75, to improve the noise defects of the iron-silicon-boron soft magnetic powder core, and to improve its high-frequency characteristics

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the modified FeSiB soft magnetic powder core provided in this embodiment includes the following steps,

[0027] Step 1, embrittlement treatment: heat-treat the iron-silicon-boron amorphous metal strip at 300°C for 2 hours to make it embrittled and easily crushed;

[0028] Step 2, crushing: crushing the brittle amorphous metal strip to obtain amorphous metal powder;

[0029] Step 3, sieving and proportioning: sieve the amorphous metal powder, and then mix it into the first powder with a weight content of 15% passing through -170~+200 mesh, and a weight content of 45% through- Powder granules composed of the second powder of 200~+270 mesh, the third powder passing through -270~+325 mesh with a weight content of 30%, and the fourth powder passing through -325~+400 mesh with a weight content of 10%;

[0030] Step 4, passivation treatment and insulation coating: Pour the proportioned amorphous powder particles into the mixer, stir and mix evenly, t...

Embodiment 2

[0053] The preparation method of the modified FeSiB soft magnetic powder core provided in this embodiment includes the following steps,

[0054] Step 1, embrittlement treatment: heat-treat the iron-silicon-boron amorphous metal strip at 300°C for 2 hours to make it embrittled and easily crushed;

[0055] Step 2, crushing: crushing the brittle amorphous metal strip to obtain amorphous metal powder;

[0056] Step 3, sieving and proportioning: sieving the amorphous metal powder, and then mixing it into the first powder with a weight content of 15%~20% passing through -170~+200 mesh, and a weight content of 45% ~50% of the second powder passing through -200~+270 mesh, 25%~30% of the third powder passing through -270~+325 mesh and 5%~10% of passing through -325~ Powder particles composed of the fourth powder of +400 mesh; step 4, passivation treatment and insulation coating: pour the amorphous powder particles with a good ratio into the mixer, stir and mix evenly, and then add pho...

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Abstract

The invention belongs to the field of metal soft magnetic material manufacturing, and particularly relates to a method for manufacturing a modified silicon iron boron soft magnetic powder core with magnetic conductivity of 75. The method comprises the first step of embrittlement treatment, the second step of crushing, the third step of screening and matching, the fourth step of passivating treatment and insulation covering, the fifth step of modifying agent adding, the sixth step of compression moulding and the seventh step of annealing treatment and spraying. According to the method, the noise defect of the silicon iron boron soft magnetic powder core can be overcome, and the high-frequency performance of the silicon iron boron soft magnetic powder core can be improved.

Description

technical field [0001] The invention belongs to the field of manufacturing metal soft magnetic materials, and in particular relates to a method for preparing a modified iron-silicon-boron soft magnetic powder core with a magnetic permeability of 75. Background technique [0002] Since Professor Duwez in the United States invented the rapid quenching process to prepare amorphous alloys in 1960, due to its unique structure, efficient preparation process, excellent material properties and broad application prospects, it has been favored by material scientists and the industry. of special attention. Amorphous magnetic powder core is a new type of composite electronic material, mainly used in switching power supply cores, common-mode inductors, high-frequency inverters and zero-sequence transformers. [0003] At present, the magnetic powder core products mainly include iron silicon boron magnetic powder cores, sendust magnetic powder cores, iron nickel magnetic powder cores, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/147H01F1/24B22F9/04B22F1/02B22F3/02
Inventor 李维强江志滨纪杰王亚娜
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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