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Preparation method of sendust magnetic core and inorganic composite insulating coating material for magnetic core

A technology of sendust and sendust, which is applied in the direction of magnetic materials, inductance/transformer/magnet manufacturing, magnetic objects, etc., can solve the problems of low temperature resistance and difficulty in eliminating stress, so as to eliminate stress and improve insulation effect , good magnetic properties

Active Publication Date: 2017-10-03
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 preparation method of a sendust magnetic core and an inorganic composite insulating coating material for the magnetic core, which belongs to the field of sendust magnetic materials and is used to solve the problem of the high eddy current loss of the existing magnetic core and the use of organic coatings in the magnetic core. The problems caused by the cladding material are that the stress is difficult to eliminate during the molding process, the insulation performance of the material is poor, and the organic matter volatilizes a lot during the heating process such as heat treatment. The preparation method of the sendust magnetic core described in the present invention includes the steps of ingot smelting, powder making, surface phosphating treatment, insulation coating, press molding, annealing treatment and surface coating, and the prepared sendust magnetic core Low eddy current loss, small temperature coefficient of magnetic permeability, good temperature stability, high DC superposition characteristics, high saturation magnetic induction, good high frequency characteristics, suitable for high frequency, miniaturization, high power and anti-electromagnetic interference requirements 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 Patents(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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