Iron-silicon magnetic powder inductance material and preparation method thereof

By constructing a composite insulating coating agent and a nanofilm on the surface of iron-silicon magnetic powder, the problems of high loss and low permeability of traditional iron-silicon magnetic powder materials at high frequencies are solved, realizing iron-silicon magnetic powder inductors with high inductance, low loss and miniaturization, meeting the design requirements of high-end electronic products.

CN121964313APending Publication Date: 2026-05-01DONGGUAN HEKANG ELECTRONICS CO LTD
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Patent Information

Application Number
CN202610152344.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-03
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Traditional iron-silicon magnetic powder materials suffer from high loss and low permeability at high frequencies, making it difficult to meet the design requirements of high-end electronic products. Especially in demanding scenarios such as aerospace and high-efficiency server power supplies, existing technologies cannot simultaneously achieve high inductance, low loss, and miniaturization.

Method used

A composite insulating coating agent is constructed using phosphate and n-type semiconductor oxide nanoparticles. Iron oxide nanofilms are generated by combining ferric nitrate and citric acid. The adhesive system is optimized, and the magnetic powder arrangement is improved by pulsed magnetic field treatment to form a high resistivity nanocomposite insulating layer, thereby increasing magnetic permeability and reducing eddy current loss.

Benefits of technology

Significantly reduces core loss, improves energy conversion efficiency, broadens the permeability range, achieves synergistic optimization of high inductance and low loss, meets the requirements of high-frequency miniaturization, and improves product reliability and compatibility.

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Abstract

The invention relates to the technical field of iron-silicon magnetic powder inductance processing, in particular to an iron-silicon magnetic powder inductance material and a preparation method thereof.The iron-silicon magnetic powder inductance material is prepared from, by weight, iron-silicon alloy, a composite insulation coating agent, a surfactant, ferric nitrate, citric acid and an adhesive solution; the preparation method comprises the following steps: ultrasonically dispersing phosphate and n-type semiconductor oxide nano powder in ethanol, adding a silane coupling agent, adjusting the pH value to 4.0-5.5, reacting at 60-80 DEG C for 2-4 hours, filtering and drying to obtain the composite insulating coating agent, the iron-silicon magnetic powder inductance material prepared through the method solves the key technical problems that iron-silicon magnetic powder is large in loss, low in magnetic conductivity and poor in design flexibility, the high-frequency performance and reliability are improved, and the urgent requirements for high frequency, miniaturization and high efficiency of power inductors in the fields of consumer electronics, new energy automobiles, 5G communication and the like are met.
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