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Fe-Si-Al magnetic core preparation method and inorganic composite insulation coating material for magnetic core

A technology of sendust and sendust, applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve problems such as difficult to eliminate stress, not resistant to high temperature, etc., to improve insulation effect and eliminate stress , The effect of stabilizing the magnetic permeability

Active Publication Date: 2016-02-03
临沂银凤新材料技术服务有限公司
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AI Technical Summary

Problems solved by technology

However, materials such as organic resins are not resistant to high temperatures, so they can only be heat treated at lower temperatures, and it is difficult to eliminate the stress generated during the molding process.

Method used

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Experimental program
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Embodiment Construction

[0028] The present invention will be further explained below in combination with specific embodiments.

[0029] A method for preparing a sendust magnetic core, comprising the following steps:

[0030] (1) Use a vacuum induction furnace according to the composition and weight ratio of 9.0-10.0% Si, 5.0-5.5% Al, 0.1-0.15% Ti, 0.05-0.1% Ni, 0.01-0.03% Cr, and the balance is Fe. Alloy smelting and casting into ingots. The melting temperature is 1450°C, and the alloy melting time is 40 minutes.

[0031] (2) After crushing the iron-silicon-aluminum alloy ingot, it is introduced into a ball mill for grinding. Using the high-energy ball milling process, with the increase of mechanical force, the shape of the particles changes, the sphericity begins to be destroyed, and there are signs of flattening. The ball milling time is 60 hours, and the weight ratio of balls to materials is 10:1. After 60 hours of ball milling, the powder is almost completely flattened. .

[0032] (3) After s...

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Abstract

The invention discloses a Fe-Si-Al magnetic core preparation method and an inorganic composite insulation coating material for a magnetic core, belonging to the field of Fe-Si-Al magnetic material and used for solving the high eddy-current loss problem of existing magnetic cores and such problems caused by the fact that the existing magnetic cores usually use organic coating materials as stress is difficult to eliminate in a forming process, the insulation property of the material is poor, and the volatilization quantity of organics is large in heating processes such as heat treatment. The Fe-Si-Al magnetic core preparation method disclosed by the invention comprises the following steps: cast ingot smelting, powder making, surface phosphorization, insulation coating, compression moulding, annealing treatment and surface coating; the prepared Fe-Si-Al magnetic core has the advantages of low eddy-current loss, small magnetic conductivity temperature coefficient, good temperature stability, high direct current superposition characteristic, high saturation flux density and good high-frequency characteristic and meets the requirements for high frequency, small size, high power and electromagnetic interference resistance of electronic devices.

Description

technical field [0001] The invention relates to a sendust magnetic material, in particular to a preparation method of a sendust magnetic core added with manganese zinc ferrite magnetic powder insulation coating agent and the inorganic composite insulation coating material for the magnetic core. Background technique [0002] Due to its distributed air gap, the sendust core is especially suitable for energy storage and filter inductors in switching power supplies; because of its high BS value and low loss, it is compatible with iron powder cores of the same volume and permeability Compared with ferrite, it has higher energy storage capacity, and is mainly used in solar wind power generation, high-power lighting power supply, fast charging of electric vehicles, choke coils, resonant inductors, filter inductors, etc. [0003] The sendust core is mainly used in the high-frequency field. As the operating frequency increases, the eddy current loss increases rapidly. Eddy current l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02H01F1/147B22F1/00B22F3/24C22C33/04
Inventor 李慎芳诸葛福杰林金荣
Owner 临沂银凤新材料技术服务有限公司
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