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A kind of preparation method of high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core

A technology of iron-based nanocrystals and soft magnetic alloys, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, and magnetic materials. Effects of reduced magnetic anisotropy, high effective permeability, and high remanence ratio

Active Publication Date: 2022-07-12
广州金磁海纳新材料科技有限公司
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  • 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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  • A kind of preparation method of high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core
  • A kind of preparation method of high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core
  • A kind of preparation method of high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core

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Embodiment 1

[0028] An embodiment of the method for preparing a high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core according to the present invention, the preparation method 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 body, 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 was raised to 480°C, and high-purity Ar was charged into the furnace cavity at the same time. At the same time, the pressure was input to the magnetic core through Ar, and the control pressure was 15MPa. The magnetic core was kept at 480°C and 15MPa for 30 minutes. The temperature rises to 530°C at a heating 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,...

Embodiment 2

[0031] An embodiment of the method for preparing a high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core according to the present invention, the preparation method 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 body, evacuate to a vacuum state, and set the heat treatment process as follows: at a heating rate of 20°C / min from The room temperature was raised to 510 °C, and high-purity Ar was charged into the furnace cavity at the same time. At the same time, the pressure was input to the magnetic core through Ar, and the control pressure was 15MPa. The magnetic core was kept at 510 °C and 15MPa for 30 minutes. The temperature rises to 540°C at a heating 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 minut...

Embodiment 3

[0034] An embodiment of the method for preparing a high-permeability iron-based nanocrystalline soft magnetic alloy magnetic core according to the present invention, the preparation method 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 body, evacuate to a vacuum state, and set the heat treatment process as follows: at a heating rate of 20°C / min from The room temperature was raised to 510 °C, and high-purity Ar was charged into the furnace cavity at the same time. At the same time, the pressure was input to the magnetic core through Ar, and the control pressure was 15MPa. The magnetic core was kept at 510 °C and 15MPa for 30 minutes. The temperature rises to 550°C at a heating 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 minut...

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Abstract

The invention discloses a preparation method of a high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core, and relates to the technical field of magnetic materials. The preparation method of the high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core of the present invention includes the following steps: (1) putting the iron-based amorphous magnetic core into a hot isostatic pressing machine, and pumping the furnace to a vacuum state , then inert gas or nitrogen gas is introduced for atmosphere protection, the furnace body is boosted to 5-20MPa, heated to 480-510°C, and kept under pressure for 10-60min; (2) after step (1) is completed, the furnace temperature The temperature is raised to 530-550°C, the pressure in the furnace is controlled to be 20-40 MPa, and the temperature is maintained for 30-90 minutes; (3) after step (2) is completed, cooling with the furnace to obtain the high-permeability iron-based nanocrystalline soft Magnetic alloy core. The invention adopts the method of subsection heating and pressurizing, heat preservation and pressure maintaining, and the prepared iron-based nanocrystalline soft magnetic alloy magnetic core has excellent comprehensive soft magnetic properties such as high magnetic permeability, low coercive force and high remanence ratio. .

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a preparation method of a high magnetic permeability iron-based nanocrystalline soft magnetic alloy magnetic core. Background technique [0002] Iron-based amorphous / nanocrystalline soft magnetic alloys are a new generation of "dual green" energy-saving materials because of their excellent soft magnetic properties, such as high saturation magnetic induction, low coercivity, high permeability, and low loss. , are widely used in power electronics fields such as transformers, inductors, sensors, etc. With the continuous progress of the society, it is more and more 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 preparing these devices to continuously improve their comprehensive soft magnetic properties. . [0003] First of all, this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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