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A preparation method of fe-si-b-cu-nb-al-ni low-cost nanocrystalline magnetic core for high-frequency electronic transformer

A fe-si-b-cu-nb-al-ni, electronic transformer technology, applied in inductance/transformer/magnet manufacturing, circuits, magnetic materials, etc., can solve the problems of unfavorable competition, high production costs, and reduce production Low cost, low production cost, and the effect of improving the saturation magnetic flux density

Active Publication Date: 2016-05-25
TONGLING SANJIA TRANSFORMER
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AI Technical Summary

Problems solved by technology

Among them, the FeCuNbSiB nanocrystalline magnetic core contains noble metal Nb, and the production cost is high, which is not conducive to competition with soft magnetic materials such as aluminum and steel.

Method used

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Examples

Experimental program
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Embodiment Construction

[0015] A method for preparing a Fe-Si-B-Cu-Nb-Al-Ni low-cost nanocrystalline magnetic core for high-frequency electronic transformers, comprising the following steps:

[0016] (1) Vacuum isothermal annealing of the iron-based amorphous thin ribbon prepared by the single-roller melt rotation quenching method at a temperature of 520°C and a vacuum degree of 0.0015Pa for 1.5h, and then air-cooled to room temperature to obtain a nanocrystalline thin ribbon. ribbon; wherein, the mass percentage of each component of the iron-based amorphous ribbon is: Fe73.5%, Si13.5%, B9%, Cu1%, Nb1.5%, Al1%, Ni0.5%, and its bandwidth 10mm, with a thickness of 15μm;

[0017] (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 30% and 70%;

[0018] (3) Take material A, add 0.6% γ-(methacryloyloxy)propyltrimethoxyalane and 3% mica powder, mix at 1500rpm...

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Abstract

The invention discloses a low-cost Fe-Si-B-Cu-Nb-Al-Ni 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; adding gamma-(methacryloxypropyl) trimethoxy aluminoxane and mica powder into the material A for treatment, and treating the material B sequentially by using triethanolamine, aluminum nitride, hexamethylenetetramine and polyvinyl alcohol; uniformly mixing the treated materials A and B, adding a sodium aluminate 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, Nb is added into the magnetic core, so that the saturation magnetic induction intensity of the magnetic core is favorably improved; Al is added, so that the coercive force is favorably reduced; in addition, the production cost of a FeSiBCuNb magnetic core can be remarkably lowered.

Description

technical field [0001] The invention relates to a method for preparing a Fe-Si-B-Cu-Nb-Al-Ni low-cost nanocrystalline magnetic core for high-frequency electronic transformers, 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 aluminum steel, ferrite, permalloy and amorphous alloy, etc. It is currently recognized as a soft magnetic material with excellent comprehensive performance in the world. Among them, FeCuNbSiB nanocrystalline magnetic core contains noble metal Nb, and the production cost is relatively high, which is not conducive to competition with soft magnetic materials such as aluminum steel....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/147B22F3/02
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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