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Soft magnetic alloy material and preparation method thereof

A technology of soft magnetic alloy and metal film, which is applied in the fields of magnetic materials, metal processing equipment, inductor/transformer/magnet manufacturing, etc., and can solve the problems of unreachable use conditions and low Q value

Active Publication Date: 2019-07-05
DONGGUAN HUALUO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The SRF (Self Resonant Frequency, self-resonant frequency) of some existing soft magnetic alloy materials is relatively low, and the Q value is low, which cannot meet the conditions for use in applications above 1MHz

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation method of the soft magnetic alloy material in this specific embodiment comprises the following steps:

[0026] S1. Prepare a soft magnetic alloy FeSiCr powder with a particle size of 8 μm to 15 μm. 0.2 wt% Al, 0.1-0.3 wt% P and 0.01-0.1 wt% B.

[0027] Preferably, the particle size of the soft magnetic alloy FeSiCr powder in S1 is 10 μm˜12 μm.

[0028] S2. Prepare soft magnetic alloy FeSiCr powder with a particle size of 1 μm to 3 μm. 0.2 wt% Al, 0.1-0.3 wt% P and 0.01-0.1 wt% B.

[0029] Preferably, the particle size of the soft magnetic alloy FeSiCr powder in S2 is 1.5 μm˜2.5 μm.

[0030] Powders with different particle sizes have different effects after different chemical or physical treatments. After experiments, the particle size range of the above soft magnetic alloy FeSiCr powder is conducive to improving the performance of the material in 1MHz high frequency application scenarios.

[0031] S3. By vapor deposition, a metal film of at least one...

experiment example 1

[0053] The soft magnetic alloy FeSiCr powder with a particle size of 8 μm is selected, and its composition is 92.1wt% Fe, 4.5wt% Si, 3.0wt% Cr, 0.05wt% Cu, 0.15wt% Al, 0.15wt% P and 0.05wt% B ;Select soft magnetic alloy FeSiCr powder with a particle size of 1μm, and its composition is 95.0wt% Fe, 3.58wt% Si, 1.2wt% Cr, 0.05wt% Cu, 0.05wt% Al, 0.1wt% P and 0.02wt% B; 8μm soft magnetic alloy FeSiCr powder is formed on the surface of the particles by vapor deposition to form a composite metal film of Fe, Zn and Al with a thickness of 200 nm; the powder after vapor deposition is in an atmosphere with a volume ratio of oxygen: nitrogen = 3:7 Heat treatment at 750°C for 1.5 hours, and pass through a 500# sieve to obtain pretreated soft magnetic alloy powder; Mix to obtain mixed soft magnetic alloy powder; place the obtained mixed soft magnetic alloy powder in a potassium metaphosphate solution at 50° C. (the potassium metaphosphate solution accounts for 3wt% of the mass of the mixed...

experiment example 2

[0055] A soft magnetic alloy FeSiCr powder with a particle size of 12 μm was selected, and its composition was 93.5wt% Fe, 3.5wt% Si, 2.5wt% Cr, 0.05wt% Cu, 0.05wt% Al, 0.3wt% P and 0.1wt% B ;Select the soft magnetic alloy FeSiCr powder with a particle size of 2μm, and its composition is 94.0wt% Fe, 4.5wt% Si, 1.2wt% Cr, 0.01wt% Cu, 0.1wt% Al, 0.15wt% P and 0.04wt% B; 12μm soft magnetic alloy FeSiCr powder was deposited on the particle surface by vapor deposition to form a composite metal film of Fe, Al and Cr with a thickness of 80 nm; the powder after vapor deposition was in an atmosphere with a volume ratio of oxygen: nitrogen = 3: 7 Perform heat treatment, that is, heat treatment at 600 °C for 2 hours, mix the pretreated soft magnetic alloy powder with the 2 μm soft magnetic alloy powder according to the mass ratio of 2.5:7.5 to prepare the mixed soft magnetic alloy powder; Mix the soft magnetic alloy powder in Sodium metaphosphate solution at 50°C (sodium metaphosphate so...

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Abstract

The invention discloses a soft magnetic alloy material and a preparation method thereof. The preparation method comprises the following steps of S1, preparing soft magnetic alloy FeSiCr powder with the particle diameter ranging from 8 microns to 15 microns; S2, preparing soft magnetic alloy FeSiCr powder with the particle diameter ranging from 1 micron to 3 microns; S3, forming metal films on thesurfaces of soft magnetic alloy FeSiCr powder particles in the step S1 through a vapor deposition method; S4, conducting heat treatment on the powder treated in the step S3 to prepare pre-treated softmagnetic alloy powder; S5, mixing the pre-treated soft magnetic alloy powder with the soft magnetic alloy FeSiCr powder in the step S2 in proportion to prepare mixed soft magnetic alloy powder; and S6, adding the mixed soft magnetic alloy powder into a metaphosphate or phosphate solution, then adding in nano-silica and / or nano-magnesia, and conducting immersing and drying. The prepared soft magnetic alloy material has a high self-resonance frequency and a Q value, and can be applied in a high frequency scene with 1 MHz or more.

Description

technical field [0001] The invention relates to the related technical field of soft magnetic alloy materials, in particular to a soft magnetic alloy material and a preparation method thereof. Background technique [0002] Automotive electronics, Internet application products, mobile communications, smart home, 5G and consumer electronics products have become the continuous driving force for the development of China's electronic components market, driving the market demand for electronic components and accelerating the replacement of electronic components. speed. With the rapid development of science and technology today, the speed of product upgrading is also getting faster and faster, and the electronic products are becoming more and more "picky" in terms of performance, size and appearance. Electronic products are gradually becoming smaller and smaller, and the circuit density is getting higher The higher the transmission speed, the faster the transmission speed is. As an...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F1/02C22C38/06C22C38/20C22C38/32C22C38/34H01F1/147H01F41/00
CPCC22C38/34C22C38/20C22C38/06C22C38/002C22C38/32H01F1/14766H01F41/00B22F1/14B22F1/142B22F1/17
Inventor 谈敏聂敏黄静刘成华
Owner DONGGUAN HUALUO ELECTRONICS CO LTD
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