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A kind of soft magnetic powder and its preparation method and use

A soft magnetic and powder technology, applied in the field of soft magnetic powder and its preparation, can solve the problem of insufficiently satisfying high magnetic permeability, and achieve the effects of good insulation, reduced eddy current loss, and high packing density

Active Publication Date: 2022-07-05
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a high compaction density (high magnetic flux density) is achieved by optimizing the lubricant system, it is not enough to meet the high frequency, low loss and high magnetic permeability performance required by the miniaturization of the existing inductance, and the magnetic flux needs to be further improved. density

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  • A kind of soft magnetic powder and its preparation method and use
  • A kind of soft magnetic powder and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a soft magnetic powder, the soft magnetic powder includes Fe-Si-Al powder, Fe-Ni powder and carbonyl iron powder amorphous powder; the Fe-Si-Al powder, Fe-Ni powder and carbonyl powder The surface of the iron powder amorphous powder is covered with a layer of compound film, and the compound in the compound film contains -Si-N- chemical bonds.

[0069] The thickness of the compound film on the surface of the Fe-Si-Al powder is 48 nm;

[0070] The thickness of the Fe-Ni powder surface compound film is 22nm;

[0071] The thickness of the compound film on the surface of the carbonyl iron powder amorphous powder is 38 nm.

[0072] The preparation method of the soft magnetic powder comprises the following steps:

[0073] (1) Soak Fe-Si-Al powder with a median particle size of 25.6 μm into a 10wt% concentration of silane coupling agent-acetone solution, and the amount of silane coupling agent added is 10% of the weight of Fe-Si-Al powder 0.7wt%, the...

Embodiment 2

[0082] This embodiment provides a soft magnetic powder, the soft magnetic powder includes Fe-Si-Al powder, Fe-Ni powder and carbonyl iron powder amorphous powder; the Fe-Si-Al powder, Fe-Ni powder and carbonyl powder The surface of the iron powder amorphous powder is covered with a layer of compound film, and the compound in the compound film contains -Si-N- chemical bonds.

[0083] The thickness of the compound film on the surface of the Fe-Si-Al powder is 20 nm;

[0084] The thickness of the Fe-Ni powder surface compound film is 22nm;

[0085] The thickness of the compound film on the surface of the carbonyl iron powder amorphous powder is 38 nm.

[0086] The difference between this example and Example 1 is that the median particle size of Fe-Si-Al powder is 21 μm, the median particle size of Fe-Ni powder is 4 μm, and the median particle size of carbonyl iron powder amorphous powder is 4 μm The rest of the preparation methods and parameters are the same as those in Example...

Embodiment 3

[0088] This embodiment provides a soft magnetic powder, the soft magnetic powder includes Fe-Ni powder, carbonyl iron powder and Fe-Si-B powder; the Fe-Ni powder, carbonyl iron powder and Fe-Si-B powder The powder surfaces are all covered with a layer of compound film, and the compound in the compound film contains -Si-N- chemical bonds.

[0089] The thickness of the compound film on the surface of the Fe-Ni powder is 100 nm;

[0090] The thickness of the compound film on the surface of the carbonyl iron powder is 10 nm;

[0091] The thickness of the Fe-Si-B powder surface compound film is 70 nm.

[0092] The preparation method of the soft magnetic powder comprises the following steps:

[0093] (1) Soak Fe-Ni powder with a median particle size of 45 μm into a 5wt% silane coupling agent-acetone solution, and the amount of silane coupling agent added is 0.9wt% of the weight of Fe-Ni powder, and then Naturally evaporate to dryness while stirring;

[0094] The carbonyl iron po...

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Abstract

The invention provides a soft magnetic powder and a preparation method and application thereof. The preparation method of the soft magnetic powder includes: (1) separately subjecting the first magnetic powder, the second magnetic powder and the third magnetic powder to surface silane coupling and silicon nitridation treatment to obtain a surface coated with -Si; The first magnetic powder, the second magnetic powder and the third magnetic powder of the compound film of -N-chemical bond; (2) the first magnetic powder and the second magnetic powder of the compound film of -Si-N-chemical bond are coated on the surface and mixed with the third magnetic powder to obtain the soft magnetic powder. In the present invention, three kinds of magnetic powders with different particle sizes and types that have undergone surface silane coupling and silicon nitridation treatment are combined and stacked, so that high packing density and ultra-high insulation resistance can be achieved under conventional pressing pressure. Effect.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a soft magnetic powder and a preparation method and application thereof. Background technique [0002] With the advancement of electronic technology and the development trend of the market, the inductive components are driven towards the goal of high frequency, miniaturization and low power consumption. [0003] Common applications of soft magnetic powder include magnetic core components, which act as pieces of magnetic material with high magnetic permeability for confinement and guidance in electrical, electromechanical and magnetic devices such as booster circuits, reactors used in power generation, substation equipment, In inductors such as transformers, choke coils, etc., the powder magnetic core used therein can be made of a soft magnetic material and a soft magnetic powder mixture containing an adhesive material, and then the mixture containing the magnetic powder and the ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147H01F41/02
CPCH01F1/14791H01F41/0246H01F1/24H01F1/14766H01F1/15308H01F1/14733B22F1/145B22F2301/35B22F2304/10H01F41/0206
Inventor 金志洪韩相华胡江平徐君
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD