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Preparation method of high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core

A technology of iron-based nanocrystals and soft magnetic alloys, applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc. The effect of reducing magnetic anisotropy, high effective permeability, and low coercivity

Active Publication Date: 2021-06-08
广州金磁海纳新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the traditional heat treatment method, due to the slow heating rate and long holding time during the heat treatment process, the long-term heat treatment process can easily cause uneven precipitation and excessive growth of the crystal grains, and cause the magnetic crystals inside the magnetic core to have enough time to produce anisotropy. Anisotropy, resulting in low effective permeability, large coercive force and high loss of the magnetic core, which is not conducive to obtaining high-performance iron-based nanocrystalline materials

Method used

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  • Preparation method of high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core
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  • Preparation method of high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core

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Embodiment 1

[0028] An embodiment of the preparation method of the high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core of the present invention, the preparation method described in this embodiment includes the following steps:

[0029] Will Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 Amorphous strip (atomic percentage), wound into a magnetic core, open the cavity, place the magnetic core in the cavity, close the furnace, pump it to a vacuum state, and set the heat treatment process as follows: at a heating rate of 20°C / min from The room temperature is raised to 480°C, and high-purity Ar is filled into the furnace cavity at the same time. At the same time, the pressure is input to the magnetic core through Ar, and the pressure is controlled at 15MPa. Raise the temperature to 530°C at a rate of 2°C / min. At this time, the pressure rises to 30MPa. The magnetic core is kept at 530°C and 30Mpa for 60 minutes, and finally cooled to room temperature. The cooling method is...

Embodiment 2

[0031] An embodiment of the preparation method of the high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core of the present invention, the preparation method described in this embodiment includes the following steps:

[0032] Will Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 Amorphous strip (atomic percentage), wound into a magnetic core, open the cavity, place the magnetic core in the cavity, close the furnace, pump it to a vacuum state, and set the heat treatment process as follows: at a heating rate of 20°C / min from The room temperature is raised to 510°C, and high-purity Ar is filled into the furnace cavity at the same time, and the pressure is input to the magnetic core through Ar at the same time as the temperature rises. The control pressure is 15MPa. Raise the temperature to 540°C at a rate of 2°C / min. At this time, the pressure rises to 30MPa. The magnetic core is kept at 540°C and 30MPa for 60 minutes, and finally cooled to room temperature. The...

Embodiment 3

[0034] An embodiment of the preparation method of the high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core of the present invention, the preparation method described in this embodiment includes the following steps:

[0035] Will Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 Amorphous strip (atomic percentage), wound into a magnetic core, open the cavity, place the magnetic core in the cavity, close the furnace, pump it to a vacuum state, and set the heat treatment process as follows: at a heating rate of 20°C / min from The room temperature is raised to 510°C, and high-purity Ar is filled into the furnace cavity at the same time, and the pressure is input to the magnetic core through Ar at the same time as the temperature rises. The control pressure is 15MPa. Raise the temperature to 550°C at a rate of 1°C / min. At this time, the pressure rises to 30MPa. The magnetic core is kept at 550°C and 30MPa for 60 minutes, and finally cooled to room temperature. The...

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Abstract

The invention discloses a preparation method of a high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core, and relates to the technical field of magnetic materials. The preparation method of the high-permeability iron-based nanocrystalline magnetically soft alloy magnetic core comprises the following steps: (1) putting an iron-based amorphous magnetic core into a hot isostatic press, vacuumizing a hearth, then introducing inert gas or nitrogen for atmosphere protection, increasing the pressure of a furnace body to 5-20MPa, increasing the temperature to 480-510 DEG C, and keeping the temperature and the pressure for 10-60 minutes; (2) after step (1) is completed, increasing the furnace temperature to 530-550 DEG C, controlling the pressure in the furnace to be 20-40 MPa, and performing heat preservation and pressure maintaining for 30-90 min; and (3) after step (2) is completed, carrying out furnace cooling to obtain the high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core. The iron-based nanocrystalline magnetically soft alloy magnetic core prepared by the method has excellent comprehensive soft magnetic properties such as high magnetic conductivity, low coercive force and high remanence ratio by adopting a manner of segmented heating and pressurizing and heat and pressure preservation for treatment.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a method for preparing a high-permeability iron-based nanocrystalline soft magnetic alloy core. Background technique [0002] As a new generation of "double green" energy-saving materials, iron-based amorphous / nanocrystalline soft magnetic alloys have excellent soft magnetic properties, such as high saturation magnetic induction, low coercive force, high magnetic permeability, and low loss. , are widely used in transformers, inductors, sensors and other power electronics fields. With the continuous progress of society, it is increasingly required that the various components used have the characteristics of high efficiency, miniaturization, high quality and light weight, which requires the soft magnetic alloy materials for these devices to continuously improve their comprehensive soft magnetic properties . [0003] First of all, this kind of alloy is usually made of a...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/147
CPCH01F41/0226H01F1/147H01F1/14766H01F1/0045
Inventor 徐佳刘辛王永飞施麒
Owner 广州金磁海纳新材料科技有限公司