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

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...

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.

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