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Nanocrystalline alloy magnetic core and preparation method thereof

A nanocrystalline alloy and magnetic core technology, which is applied in the fields of transformer/inductor magnetic core, inductor/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of low relaxation frequency of iron-based soft magnetic alloy materials and cannot meet the requirements of high-frequency transformers. Use, high frequency loss and other problems, to achieve the effect of broadening the product market and application prospects, low high frequency loss, and improving the grain nucleation density and dispersion

Active Publication Date: 2019-05-14
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the iron-based soft magnetic alloy materials prepared by traditional methods have low relaxation frequency and high high-frequency loss, which cannot meet the needs of high-frequency transformers.

Method used

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  • Nanocrystalline alloy magnetic core and preparation method thereof
  • Nanocrystalline alloy magnetic core and preparation method thereof
  • Nanocrystalline alloy magnetic core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This implementation provides a high relaxation frequency nanocrystalline magnetic core for a high frequency transformer. The preparation method of the magnetic core is as follows.

[0065] (1) First, the alloy composition selects Fe 76 Si 13 B 8 Nb 2 Cu 1 , using rapid cooling technology to prepare quenched alloy strips, the specific steps are: Fe, Si, B, Cu and Nb of industrial raw materials are batched according to the components of this embodiment; raw materials with a good ratio are put into an induction melting furnace In the aluminum crucible inside, high temperature melting and heat preservation for 15 minutes, then the melted mixture is poured into a copper mold and cooled to prepare a master alloy steel ingot with uniform composition. The roll speed was 30 m / s). Denoted as the quenched alloy strip M1, the thickness of the quenched alloy strip M1 is 20 microns.

[0066] Carry out XRD test to this as-quenched alloy strip M1, detect its microstructure, the ...

Embodiment 2

[0078] This implementation provides a high relaxation frequency nanocrystalline magnetic core for a high frequency transformer. The preparation method of the magnetic core is as follows.

[0079] (1) First, the alloy composition selects Fe 75.5 Si 13 B 8 Nb 2 Cu 1 (VCAl) 0.5 , using rapid cooling technology to prepare quenched alloy strip, the specific steps are basically the same as in Example 1, the difference is that the copper roll speed is 35m / s. Denoted as quenched alloy strip M2. The as-quenched alloy strip M2 has a strip thickness of 18 microns.

[0080] Carry out XRD test to this quenched alloy strip M2, observe its microstructure, the result is as follows Figure 12 shown. The XRD pattern of the free surface and the rolled surface of the as-quenched alloy strip M2 shows that it has a broadened diffuse diffraction peak at 45°; indicating that the microstructure of all regions of the as-quenched strip is completely amorphous .

[0081] (2) Then, enclose and ...

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Abstract

The invention discloses a nanocrystalline alloy magnetic core and a preparation method thereof. According to the nanocrystalline alloy magnetic core provided by the invention, multi-field coupling heat treatment is carried out on a quenched alloy material to obtain the nanocrystalline alloy magnetic core, wherein the quenched alloy material comprises at least one of a compound with the chemical formula as shown in formula I. The nanocrystalline alloy magnetic core has high relaxation frequency and low high-frequency loss. According to the invention, the high-frequency characteristic of the nanocrystalline magnetic core is realized through multi-field coupling of the heat field, the magnetic field and the stress field and real-time relegation and control, so that the relaxation frequency ofthe nanocrystalline alloy magnetic core is improved and the high-frequency loss is reduced.

Description

technical field [0001] The application relates to a nanocrystalline alloy magnetic core and a preparation method thereof, belonging to the technical field of magnetic materials. Background technique [0002] In recent years, the energy crisis is imminent, but the world's energy consumption is increasing at a tremendous rate every year. Energy conservation and environmental protection, and the development of a green, low-carbon economy have been widely valued by people. Therefore, electronic devices are developing in the direction of miniaturization, high efficiency, high frequency and low energy consumption, which requires soft magnetic alloy materials to have high saturation magnetic induction, low high-frequency loss, high magnetic permeability and good high-frequency frequency Features and other excellent high-frequency comprehensive performance. [0003] At present, the common magnetic cores in high-frequency transformers are mainly manganese-zinc ferrite. However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/153H01F27/25H01F41/02B22D11/06C21D1/04C21D6/00C21D9/08C22C38/02C22C38/16C22C38/12C22C38/06
Inventor 贺爱娜董亚强黎嘉威肖恢芸曹艺李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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