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Atomized metal powder, insulating coating agent, magnetic powder core and preparation method of magnetic powder core

An atomized metal and insulating coating technology, applied in the electromagnetic field, can solve the problems of magnetic powder core electromagnetic performance decline, coating damage, atomized metal powder collision, etc. , The effect of improving the forming density

Pending Publication Date: 2022-04-22
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, when the surface of the atomized metal powder particles is crusted but the inside is still in a molten state, because the powder particles are not completely solidified, the collision between the atomized metal powders causes depressions
Second, due to the fracture of non-standard spherical powder (such as comet-shaped, dumbbell-shaped), resulting in crater-shaped pits
Taking amorphous powder as an example, when the coated amorphous powder is pressed into the magnetic powder core, the pits may cause damage to the coating layer, resulting in a decrease in the electromagnetic properties of the magnetic powder core.

Method used

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  • Atomized metal powder, insulating coating agent, magnetic powder core and preparation method of magnetic powder core
  • Atomized metal powder, insulating coating agent, magnetic powder core and preparation method of magnetic powder core
  • Atomized metal powder, insulating coating agent, magnetic powder core and preparation method of magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The insulating coating agent is composed of 200 parts by weight of resin composition, 2.5 parts by weight of emulsifier, 220 parts by weight of water, 80 parts by weight of co-solvent, and 2 parts by weight of nano silicon dioxide. Wherein, the resin composition is composed of epoxy resin and silicone resin, and the weight ratio of epoxy resin and silicone resin is (2:3)-(3:2). In one example, the weight ratio of epoxy resin to silicone resin is 2:3. In another example, the weight ratio of epoxy resin to silicone resin is 1:1. The weight ratio of epoxy resin and silicone resin is 3:2.

[0037] The insulating coating agent in Example 1 can be prepared in the following manner.

[0038] Add 60 parts by weight of the resin composition, 40 parts by weight of co-solvent, 110 parts by weight of water, 1.25 parts by weight of emulsifier, and 2 parts by weight of nano silicon dioxide into a reaction container (such as a three-necked bottle). The reaction vessel was placed in ...

Embodiment 2

[0041] The insulating coating agent consists of 200 parts by weight of resin composition, 2.5 parts by weight of emulsifier, 220 parts by weight of water, 80 parts by weight of cosolvent, 2 parts by weight of nano silicon dioxide, and 5 parts by weight of water-based rust inhibitor composition. Wherein, the resin composition is composed of epoxy resin and silicone resin, and the weight ratio of epoxy resin and silicone resin is (2:3)-(3:2).

[0042] The insulating coating agent in Example 2 can be prepared in the following manner.

[0043] Add 60 parts by weight of resin composition, 40 parts by weight of cosolvent, 110 parts by weight of water, 1.25 parts by weight of emulsifier, 2 parts by weight of nano silicon dioxide, 5 parts by weight of water-based rust inhibitor. The reaction vessel was placed in a water bath, and the temperature of the water bath was adjusted to 80°C-90°C, and the stirring speed was set to 800r / min for thorough mixing for 30min.

[0044] Then, at a...

Embodiment 3

[0046] The insulating coating agent consists of 200 parts by weight of resin composition, 2.5 parts by weight of emulsifier, 220 parts by weight of water, 80 parts by weight of cosolvent, 2 parts by weight of nano silicon dioxide, 0.5 parts by weight of reaction accelerator, 5 parts by weight of water-based antirust agent. Wherein, the resin composition is composed of epoxy resin and silicone resin, and the weight ratio of epoxy resin and silicone resin is (2:3)-(3:2).

[0047] The insulating coating agent in Example 3 can be prepared in the following manner.

[0048] Add 60 parts by weight of resin composition, 40 parts by weight of cosolvent, water of 110 parts by weight, emulsifier of 1.25 parts by weight, reaction accelerator of 0.25 parts by weight, 2 parts by weight of Nano silica, 5 parts by weight of water-based antirust agent. The reaction vessel was placed in a water bath, and the temperature of the water bath was adjusted to 80°C-90°C, and the stirring speed was s...

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Abstract

The invention relates to the technical field of electromagnetism, in particular to atomized metal powder, an insulating coating agent, a magnetic powder core and a preparation method of the magnetic powder core. 0-5 pits exist on the particle surface of the atomized metal powder, an insulating coating layer is arranged on the particle surface of the atomized metal powder, and the coating layer is obtained by coating the atomized metal powder with an insulating coating agent; wherein the shape of each pit is similar to a hemisphere, the diameter of an opening is 0.2-10 microns, and the depth of the opening is 0.1-0.5 microns; the insulating coating agent includes: 200 parts by weight of a resin composition; wherein the resin composition is composed of epoxy resin and organic silicon resin, and the weight ratio of the epoxy resin to the organic silicon resin is (2: 3)-(3: 2); 2-3 parts by weight of an emulsifier; 200 to 240 parts by weight of water; 70-90 parts by weight of a cosolvent; and 1-3 parts by weight of nano silicon dioxide.

Description

technical field [0001] The embodiments of the present application relate to the field of electromagnetic technology, and in particular to an atomized metal powder, an insulating coating agent, a magnetic powder core and a preparation method thereof. Background technique [0002] The surface of atomized spherical powder particles is prone to depressions due to the preparation process and other reasons. There are two main reasons for the depression. First, when the surface of the atomized metal powder particles is crusted but the inside is still in a molten state, because the powder particles are not completely solidified, the collision between the atomized metal powders causes depressions. Second, due to the breakage of non-standard spherical powder (such as comet-shaped, dumbbell-shaped), crater-shaped pits appear. [0003] In the traditional insulation coating process, the pits on the surface of the atomized metal powder particles reduce the coating effect. Taking amorph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F3/08H01F27/255H01F41/02C09D163/02C09D183/08C09D7/61
CPCH01F1/14758H01F3/08H01F41/0246H01F27/255C09D163/00C09D183/08C09D7/61C08K2201/011C08L83/08C08K3/36C08L63/00
Inventor 陈文李晓雨张宇赵欢周侃王玉峰房晋师
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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