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FeSiAl material magnetic core and producing method thereof

A magnetic core and magnetic permeability technology, which is applied in the field of FeSiAl material magnetic core and the preparation of the above-mentioned material magnetic core, can solve the problems of limiting the performance of FeSiAl material products and the small range of process angles, so as to improve the DC bias characteristics and increase the magnetic permeability. , The effect of reducing hysteresis loss

Active Publication Date: 2006-08-02
北京七星飞行电子有限公司
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Problems solved by technology

[0007] The above-mentioned patents mainly solve the production process problems of FeSiAl-based materials by adding insulating agents, adhesives, lubricants, etc. in the alloy, but the scope of the process involved is small, which limits the overall improvement of the performance of FeSiAl-based materials, including magnetic The overall improvement of conductivity, DC bias characteristics, iron loss and other performance

Method used

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  • FeSiAl material magnetic core and producing method thereof
  • FeSiAl material magnetic core and producing method thereof
  • FeSiAl material magnetic core and producing method thereof

Examples

Experimental program
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Embodiment 1

[0025] It is smelted by air and cast into a plate. The thickness of the plate is not strictly limited, generally 0.001mm to 120mm. The board is crushed and powdered, and the powder is passed through a -80 mesh sieve, wherein the powder with a particle size of -400 mesh is controlled between 15% and 55% of the total weight. The powder is heat-treated, and the temperature is controlled at 700-1000°C. The atmosphere during heat treatment can be air, nitrogen, hydrogen, vacuum or a nitrogen-hydrogen mixed atmosphere. Then add insulating agent in the powder, insulating agent accounts for the weight percent content of FeSiAl alloy powder is 0.1%, adds binder and accounts for the weight percent content of FeSiAl alloy powder is 0.8%, adds lubricant and accounts for the weight percent content of FeSiAl alloy powder is 0.1%. Among the above additives, the insulating agent can use high-performance mica powder, kaolin or a mixture of the two; the adhesive can use one of epoxy resin, phe...

Embodiment 2

[0030] Various additives added in the powder of embodiment one, wherein the insulating agent accounts for the weight percent content of the FeSiAl alloy powder is 1%, the binder accounts for the weight percent content of the FeSiAl alloy powder is 0.1%, and the lubricant accounts for the FeSiAl alloy powder. The weight percent content is 0.8%. All the other conditions are the same as in Example 1. The properties of the magnetic core prepared in this embodiment are shown in Table 2.

[0031] Table 2

[0032]

Embodiment 3

[0034] By the processing step of embodiment one. Heat-treat the pressed ring in a nitrogen-hydrogen mixed atmosphere for not less than half an hour. Its performance is shown in Table 3.

[0035] table 3

[0036]

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Abstract

This invention relates to a magnetic core of a FeSiAl material, in which, when the bias property is at H=200e, the magnetic conductivity is mum20 greater or equal to 65% mum0, Ferro loss Pcv at f=50KHz, Bm=0.1T and Pcv is less than or equal to 350mw / cm3, the magnetic conductivity of the material is 125. The preparation method includes: A, applying an ordinary method to smelt FeSiAl alloy board ingot of 0.001-120mm thick to crush it to powder, B, annealing the FeSiAL powder in step A, C, adding insulation agent, bonder and lubricant agent into the alloy powder, in which, the added insulation agent is 0.1-0.8%, the bonder is 0.1-1% and the lubricant agent is 0.1-1% of that of the FeSIAl powder, D, pressing the product in step C to formation to be annealed to get the target.

Description

technical field [0001] The invention relates to a metal magnetic powder core product in the field of soft magnetic materials, in particular to a FeSiAl material magnetic core. [0002] The invention also relates to a method for preparing the magnetic core of the above material. Background technique [0003] With the development of switching power supplies of electronic products towards high frequency, high power and miniaturization, especially the development of energy saving, the requirements for bias current and iron loss characteristics of magnetic materials are getting higher and higher. Since the iron loss of FeSiAl metal magnetic powder core products is more than 75% lower than that of pure iron powder cores, and the cost performance is higher than that of FeNiMo, FeNi50 and other metal magnetic powder core products, FeSiAl metal magnetic powder core products are gradually being widely used. [0004] Electronic components with low energy consumption are increasingly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/22H01F3/00H01F41/02B22F3/00
Inventor 王彦伶
Owner 北京七星飞行电子有限公司
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