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Amorphous-nanocrystalline composite magnetic power core and production method thereof

An amorphous nanocrystalline, magnetic powder core technology, applied in the direction of inductor/transformer/magnet manufacturing, magnetic materials, magnetic objects, etc., can solve the problem of low saturation magnetic induction intensity and permeability, low magnetic particle content, DC magnetic flux density Low problems, to achieve the effect of improving magnetic properties and mechanical properties, excellent soft magnetic properties, and ensuring insulation effect

Active Publication Date: 2014-02-05
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when the above-mentioned soft magnetic materials use organic matter such as phenolic resin or epoxy resin as the binder, they still have the following defects: 1. Due to the incorporation of a large amount of insulating resin, the content of magnetic particles per unit volume is reduced, and the DC magnetic flux density is low.
2. After being bonded and compacted by organic matter, the density between the powders is relatively low, resulting in low saturation magnetic induction and low magnetic permeability of the material
3. Due to the low use temperature of organic matter, poor heat resistance and temperature stability, the mechanical strength of the pressed bulk material is significantly reduced after heat treatment

Method used

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  • Amorphous-nanocrystalline composite magnetic power core and production method thereof
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Experimental program
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Effect test

Embodiment 1

[0034] The amorphous nanocrystalline composite magnetic powder core provided in this embodiment is mainly composed of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder and insulating agent. 0.5~2wt% and 0.5~4wt% of the total weight; and the insulating agent is a mixture of inorganic oxides, carbides and nitrides. The inorganic oxide is selected from SiO 2、 Al 2 o 3、 TiO 2、 ZrO 2One or more; the carbide is selected from one or both of AlC and TiC; the nitride is selected from one or both of AlN and TiN. The insulating agents are all nano powders.

[0035] The iron-based amorphous powder is made of amorphous Fe that passes through -200~+270 mesh 80 Si 12.6 B 5.4 C 2 Powder, the iron-based nanocrystalline powder adopts nanocrystalline Fe passing through -270~+325 mesh 73.5 Cu 1 Nb 3 Si 13.5 B 9 Powder, organic binder adopts phenolic resin.

[0036] Specifically, iron-based amorphous Fe a (Si b B 1-b ) 98-a C 2 In the powder, a is 8...

Embodiment 2

[0060] The amorphous nanocrystalline composite magnetic powder core provided in this embodiment is mainly composed of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder and insulating agent, and the weight of organic binder and insulating agent accounts for two powders respectively 1wt% and 2wt% of the total weight.

[0061] The iron-based amorphous powder is made of amorphous Fe that passes through -200~+270 mesh 80 Si 12.6 B 5.4 C 2 Powder, the iron-based nanocrystalline powder adopts nanocrystalline Fe passing through -270~+325 mesh 73.5 Cu 1 Nb 3 Si 13.5 B 9 Powder, organic binder adopts epoxy resin, insulating agent adopts ZrO 2 , AlC, TiN mixture, the weight ratio of the three is 5:4:1.

[0062] The weight content of the iron-based amorphous powder in the two powders is 15-60wt%, and that of the iron-based nanocrystalline powder is 40-85wt%.

[0063] Specifically, iron-based amorphous Fe a (Si b B 1-b ) 98-a C 2 In the powder, a...

Embodiment 3

[0074] The difference between the amorphous nanocrystalline composite magnetic powder core provided in this example and Example 1 is that the iron-based amorphous powder uses Fe 80 Si 7.2 B 10.8 C 2 powder. Specifically, iron-based amorphous Fe a (Si b B 1-b ) 98-a C 2 In the powder, a is 80, and b is 0.4.

[0075] In this embodiment, the proportions of the two powders were changed to obtain 4 examples, marked as 5-8. The contents of iron-based amorphous powder and iron-based nanocrystalline powder in each example are as described in Table 2.

[0076] The preparation method of the above-mentioned amorphous nanocrystalline composite magnetic powder core provided in this embodiment differs from that of Example 2 in that the iron-based amorphous strip is made of Fe 80 Si 7.2 B 10.8 C 2 Made of iron-based amorphous powder.

[0077] Performance test: Detect the magnetic performance of the magnetic core and record it in Table 2.

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Abstract

The invention belongs to the field of function materials and particularly relates to an amorphous-nanocrystalline composite magnetic power core and a production method thereof. The amorphous-nanocrystalline composite magnetic power core is mainly made of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder, and insulating agent. The insulating agent is a mixture of inorganic oxide, carbide and nitride. The organic binder and the insulating agent account for 0.5-2wt% and 0.5-4wt% of total weight of the two powders respectively. The production method includes: amorphous strip embrittlement, mechanical breaking for powdering, screening, passivation and insulation coating, die pressing, and heat treatment. The amorphous-nanocrystalline composite magnetic power core has excellent soft magnetic properties, thermal stability and mechanical strength under medium and high frequencies, and can be massively used for various inductive components, such as filters, current regulators and energy storage components, on various switch power modules.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to an amorphous nanocrystalline composite magnetic powder core and a preparation method thereof. Background technique [0002] Amorphous and nanocrystalline soft magnetic alloys have excellent soft magnetic properties, and their thin strip wound iron core products have been widely used. However, due to the large eddy current loss at high frequencies, it is difficult to use amorphous and nanocrystalline soft magnetic alloy thin strip winding iron cores at high frequencies. Therefore, it is an inevitable trend to use powder metallurgy technology to develop amorphous and nanocrystalline magnetic powder cores under high frequency. Magnetic powder core is a new type of composite electronic material, which is a soft magnetic material formed by mixing and pressing amorphous strip powder and insulating medium. Its preparation process is as attached figure 1 As shown, the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/153H01F1/22H01F41/02B22F3/02
Inventor 王静江志滨庞靖任翠霞王玲王亚娜
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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