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Preparation method of low-loss high permeability Fe-Si-Al magnetic powder core

A high-permeability, iron-silicon-aluminum technology, applied in the direction of inorganic materials such as magnetism, can solve the problem of large core loss, and achieve the effects of low high-frequency loss, improved permeability, and convenient operation.

Inactive Publication Date: 2015-02-18
惠州市科力磁元有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large number of low-priced pure iron powder cores are used in metal magnetic powder cores, but the core loss is large, and the magnetic permeability is about 75.

Method used

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  • Preparation method of low-loss high permeability Fe-Si-Al magnetic powder core
  • Preparation method of low-loss high permeability Fe-Si-Al magnetic powder core
  • Preparation method of low-loss high permeability Fe-Si-Al magnetic powder core

Examples

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Effect test

Embodiment 1

[0028] A method for preparing a low-loss high-permeability sendust magnetic powder core, the specific steps are:

[0029] (1) Melt industrial pure iron, then put polysilicon, pure aluminum, and ferro-titanium alloy into a non-vacuum induction furnace with a nominal weight of 100 kg and smelt it with mold slag. . The chemical composition is, Si 9.3%, Al 5.7%, C 0.014%, O 2 0.0036%, N 2 0.008%, Ti 0.3%, the rest is Fe;

[0030] (2) Use mechanical methods to break the iron-silicon-aluminum alloy ingot into alloy powder less than 120 meshes, put the powder into a heat treatment furnace with a hydrogen atmosphere, and heat it at 1000°C for 2 hours for annealing treatment. The alloy powder is sieved, and the particle size distribution of -120 mesh to +200 mesh accounts for 15%, -200 mesh to +300 mesh accounts for 55%, and -300 mesh accounts for 30% to form the sendust aluminum alloy powder;

[0031] (3) Add the sendust aluminum alloy powder into the phosphoric acid alcohol solut...

Embodiment 2

[0038] A method for preparing a low-loss high-permeability sendust magnetic powder core, the specific steps are:

[0039] (1) Melt industrial pure iron, then put polysilicon, pure aluminum, and ferro-titanium alloy into a non-vacuum induction furnace with a nominal weight of 100 kg and smelt it with mold slag. . The chemical composition is, Si 9.7%, Al 5.4%, C 0.010%, O 2 0.0035%, N 2 0.005%, Ti 0.5%, the rest is Fe;

[0040] (2) Use mechanical methods to break the iron-silicon-aluminum alloy ingot into alloy powder less than 120 meshes, put the powder into a heat treatment furnace with a hydrogen atmosphere, and heat it at 900°C for 2 hours for annealing treatment. The alloy powder is sub-sieved, and the particle size distribution of -120 mesh to +200 mesh accounts for 12%, -200 mesh to +300 mesh accounts for 56%, and -300 mesh accounts for 32% to form the sendust aluminum alloy powder;

[0041](3) Add the sendust aluminum alloy powder into the phosphoric acid alcohol sol...

Embodiment 3

[0047] A method for preparing a low-loss high-permeability sendust magnetic powder core, the specific steps are:

[0048] (1) Melt industrial pure iron, then put polysilicon, pure aluminum, and ferro-titanium into a non-vacuum induction furnace with a nominal weight of 100 kg and use mold slag for smelting. After smelting with 1 kg of mold slag, cast iron-silicon-aluminum alloy ingot . The chemical composition is, Si 9.5%, Al 5.5%, C 0.012%, O 2 0.0030%, N 2 0.007%, Ti 0.4%, the rest is Fe;

[0049] (2) Use mechanical methods to break the iron-silicon-aluminum alloy ingot into alloy powder less than 120 meshes, put the powder into a heat treatment furnace with a hydrogen atmosphere, and heat it at 950°C for 2 hours for annealing treatment. The alloy powder is sub-sieved, and the particle size distribution of -120 mesh to +200 mesh accounts for 16%, -200 mesh to +300 mesh accounts for 53%, and -300 mesh accounts for 31% to form the sendust aluminum alloy powder;

[0050] (3...

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Abstract

The invention belongs to the technical field of preparation of magnetic materials and discloses a preparation method of a low-loss high permeability Fe-Si-Al magnetic powder core. The method comprises the following steps: (1), adopting a medium-frequency induction furnace, and smelting Fe-Si-Al alloy ingot casting by using casting powder; (2), mechanically crushing the Fe-Si-Al alloy ingot casting into power, performing annealing treatment, screening, and making into Fe-Si-Al alloy powder according to different particle size ratio; (3), performing insulating treatment on the Fe-Si-Al alloy powder, adding an internal lubricant, a releasing agent and then compression moulding forming, preparing into a compression molding product with the density being 6.0-6.2 g / cm<3>; (4), performing heat treatment on the compression molding product, and carrying out surface insulation coating to obtain the Fe-Si-Al magnetic powder core. The preparation method of low-loss high permeability Fe-Si-Al magnetic powder core is low in cost, convenient to operate, high in performance, high in magnetic conductivity and low in high-frequency loss.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation, and in particular relates to a method for preparing a sendust magnetic powder core with low loss and high magnetic permeability. Background technique [0002] In recent years, the development of science and technology, especially the emphasis on energy conservation and emission reduction, reduction of environmental pollution, and saving of precious resources have greatly promoted the electronics and electrical industries. Solar power generation, wind power generation, high-power lighting power supply, electric large-scale electric vehicle fast charger and industrial control equipment all involve switching power supply, including frequency conversion, energy storage line filtering, power factor corrector, anti-electromagnetic interference, etc. Inductance, and iron core must be used to improve inductance and good magnetic properties. The frequency of tens of hertz is to use ...

Claims

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Application Information

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IPC IPC(8): H01F1/26C22C33/04B22F1/00B22F1/02B22F3/02
Inventor 王寿良黄玉良王千黄昆
Owner 惠州市科力磁元有限公司
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