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Soft magnetic powder core and preparation method thereof

A soft magnetic powder core, soft magnetic powder technology, applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc.

Pending Publication Date: 2021-07-30
苏州锦鳞电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a soft magnetic powder core and its preparation method for the problem of how to improve efficiency

Method used

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  • Soft magnetic powder core and preparation method thereof

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preparation example Construction

[0070] See figure 1 , the preparation method of the soft magnetic powder core of one embodiment of the present invention, comprises the following steps:

[0071] S10. According to the proportion, mix the iron-based metal soft magnetic powder with the coupling agent hydrolysis solution evenly, and fully react after removing the moisture to obtain the iron-based metal soft magnetic powder after coupling treatment.

[0072] Among them, the aspect ratio of the iron-based metal soft magnetic powder is preferably 1.00-1.50, and its preparation method may be a gas atomization method, a water-air combined atomization method, or an ultrasonic method. At this time, the iron-based metal soft magnetic powder is a sphere or an ellipsoid close to a sphere, which is more conducive to forming.

[0073] In one embodiment, the condition for sufficient reaction is: baking at a temperature of 120° C. to 150° C. for 30 minutes to 120 minutes.

[0074] In step S10, the morphology of the iron-base...

Embodiment 1

[0097] Embodiment 1 adopts iron-based amorphous soft magnetic alloy powder, and the composition is Fe 76 (SiB) 24 , the D50 particle size is 25 μm, and the aspect ratio of the powder morphology is 1.25.

[0098]Mix 1000g of iron-based amorphous soft magnetic alloy powder with 1g of epoxy silane coupling agent evenly. Then bake at 120° C. for 120 minutes to obtain the iron-based metal soft magnetic powder after coupling treatment.

[0099] Mix 1000g of coupling-treated iron-based metal soft magnetic powder with 60g of molding agent evenly, wherein, component A of the molding agent is 40g of biphenol type epoxy resin, and component B of the molding agent is 20g of phenol arane base phenolic resin, 1g of 2-methylimidazole and 3g of paraffin wax powder with a particle size of -30 mesh (its drop point temperature is 80°C), and all the above materials are preliminarily mixed in a three-dimensional mixer for 10 minutes, and then the mixed material is extruded with a screw machine,...

Embodiment 2

[0102] The preparation method of the soft magnetic powder core of embodiment 2 is the same as the preparation method of the soft magnetic powder core of embodiment 1, the difference is only: the iron-based metal soft magnetic powder of embodiment 2 is Fe 92.0 Si 3.5 Cr 4.5 powder, and Fe 92.0 Si 3.5 Cr 4.5 The morphology aspect ratio of the powder is 1.05.

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Abstract

The invention relates to a soft magnetic powder core and a preparation method thereof. The soft magnetic powder core is prepared from the following raw materials in parts by mass: 100 parts of iron-based metal soft magnetic powder; 0.01 to 0.3 part of a coupling agent; and 3-6 parts of a forming agent. The forming agent comprises the following components in parts by mass: 2-4 parts of first resin; 1-2 parts of phenolic resin; and 0.03 to 0.3 part of a curing accelerator. The first resin is selected from at least one of functional epoxy resin, cyanate ester and bismaleimide resin. In the raw materials of the soft magnetic powder core, the coupling agent is used for carrying out coupling treatment on the surface of the iron-based metal soft magnetic powder, the forming agent can be uniformly and firmly adsorbed on the surface of the iron-based metal soft magnetic powder subjected to coupling treatment, and the forming agent also plays a mechanical transmission role in the preparation process of the soft magnetic powder core. By means of the whole technical schemes, the soft magnetic powder core can be formed under the low forming pressure, the process difficulty that a traditional soft magnetic powder core needs high-pressure forming is solved, and the production efficiency can be improved.

Description

technical field [0001] The invention relates to the field of magnetic functional materials, in particular to a soft magnetic powder core and a preparation method thereof. Background technique [0002] Magnetic powder core is a kind of soft magnetic material formed by mixing and pressing ferromagnetic powder particles and insulating medium. Traditional soft magnetic powder cores appeared in the United States at the beginning of the 20th century. With the rise and extensive development of the third technological revolution, metal soft magnetic powder cores as electric differential mode inductor materials have been popularized and used as power factor correction inductors and filter inductors. The role of etc. in modern circuits is irreplaceable and crucial. Traditional soft magnetic powder cores include iron powder cores, sendust powder cores, sendust powder cores, and permalloy powder cores, each of which has its own characteristics and cannot replace each other. However, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/14H01F41/02
CPCH01F1/14H01F41/02
Inventor 郭峰
Owner 苏州锦鳞电子科技有限公司
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