High-performance nanocrystalline magnetic core preparation method for high-frequency electronic transformer

An electronic transformer and nanocrystalline technology, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., can solve problems such as limited use, low Curie temperature, high and high frequency losses, etc., to increase the quality factor and reduce Total loss value, the effect of low loss value

Active Publication Date: 2014-04-02
TONGLING SANJIA TRANSFORMER
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Problems solved by technology

However, the existing iron-based nanocrystalline magnetic core materials limit their use at high temperature and high frequency due to their low Curie temperature and high high-frequency loss.

Method used

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Embodiment Construction

[0017] A method for preparing a high-performance nanocrystalline magnetic core for a high-frequency electronic transformer, comprising the following steps:

[0018] (1) Vacuum isothermal annealing of the iron-based amorphous thin strip prepared by the single-roller melt rotary quick quenching method at a temperature of 460°C and a vacuum degree of 0.0012Pa for 1.5h, cooled to 350°C in the furnace, and kept for 0.5h. Then water cooled to room temperature to obtain nanocrystalline thin strips; wherein, the mass percentages of the components of the iron-based amorphous thin strips are: Fe 36.75%, Co 36.75%, Cu 1%, Nb 3%, Si 13.5%, B 9%, its bandwidth is 10mm, and its thickness is 30μm;

[0019] (2) Crushing the prepared nanocrystalline thin strips to obtain nanocrystalline metal powder, and then dividing the nanocrystalline metal powder into A and B materials according to the weight ratio of 75% and 25%;

[0020] (3) Take material A and add appropriate amount of water to prepare...

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Abstract

The invention discloses a high-performance nanocrystalline magnetic core preparation method for a high-frequency electronic transformer. The method specifically comprises the following steps of performing vacuum isothermal annealing on an iron-based amorphous thin strip to obtain a nanocrystalline thin strip; crushing the obtained nanocrystalline thin strip to obtain nanocrystalline metal powder; classifying the nanocrystalline metal powder into unequal parts of materials A and B; treating the material A by using sodium alcohol ether sulphate, sodium polymethacrylate and sodium hexametaphosphate, and treating the material B sequentially by using vinyl trimethoxy silane, kaolin, polyisobutylene, phytic acid, nanocarbon and polyacrylic acid; uniformly mixing the treated materials A and B, adding a sodium silicate aqueous solution, performing compression molding, coating the surface of a molded magnetic core with magnetic core glue G500, and performing curing to obtain a finished product. According to the method, the prepared magnetic core has the advantages of excellent high-temperature and high-frequency characteristics, low loss value and the like, and is high in comprehensive performance.

Description

technical field [0001] The invention relates to a preparation method of a high-performance nanocrystalline magnetic core for a high-frequency electronic transformer, belonging to the technical field of magnetic materials. Background technique [0002] Iron-based nanocrystalline soft magnetic materials have high saturation magnetic induction, high magnetic permeability, low coercive force and low high-frequency loss, good hardness, wear resistance and corrosion resistance, good temperature and environmental stability, and its comprehensive The magnetic performance is far superior to that of silicon steel, ferrite, permalloy and amorphous alloy, etc. It is currently recognized as a soft magnetic material with excellent comprehensive performance in the world. With the rapid development of the electronics industry, information, communication and other industries, people have higher and higher requirements for soft magnetic materials, such as requiring high resistance to reduce f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F41/02B22F3/02
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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