A kind of sendust magnetic powder core and preparation method thereof
An iron-silicon-aluminum and iron-silicon technology, which is applied in the field of iron-silicon-aluminum magnetic powder cores and their preparation, can solve problems such as poor DC paranoia, achieve high density, uniform organization, and improve corrosion resistance and service time.
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Embodiment 1
[0022] figure 1 The flow chart of the preparation method of the iron-silicon-aluminum magnetic powder core provided by the first embodiment of the present invention, such as figure 1 As shown, the method includes:
[0023] S10, preparing iron-silicon-aluminum powder.
[0024] Specifically, it is smelted in a vacuum environment and prepared by a gas atomization method in an inert atmosphere.
[0025] S20, preparing iron-silicon powder.
[0026] Specifically, it is the same as the preparation method of the iron-silicon-aluminum powder in step S10, which is smelted in a vacuum environment and prepared by a gas atomization method in an inert atmosphere.
[0027] S30, sieving the iron-silicon-aluminum powder and the iron-silicon powder with specific meshes respectively; wherein the iron-silicon-aluminum powder has a composition of -120 mesh to -270 mesh, and the iron-silicon powder has a composition of -200 mesh to -325 mesh. eye.
[0028] S40, the sieved powders are respectiv...
Embodiment 2
[0040] In step 1, the iron-silicon-aluminum powder is obtained by gas atomization.
[0041] In step 2, the iron-silicon powder is obtained by the same gas atomization method.
[0042] Step 3, sieving: the iron-silicon-aluminum powder and the iron-silicon powder are respectively screened, and the iron-silicon-aluminum powder passes through a -200 mesh; the iron-silicon powder passes through a -325 mesh.
[0043] Step 4, passivation and insulation coating treatment: respectively, the iron-silicon-aluminum powder and the iron-silicon powder are sequentially subjected to passivation and insulation coating treatment. First, pour a certain amount of FeSiAl powder into the mixer, and after stirring for a few minutes, add phosphoric acid solution with passivation effect. After the powder is dried, a silica sol solution is used, and the addition amount is 1%; continue to stir evenly; after the powder is dried, add insulating agent low-melting glass powder and silicone resin, and the a...
Embodiment 3
[0061] The preparation method of the FeSiAl soft magnetic powder core provided by this embodiment includes the following steps:
[0062] In step 1, the iron-silicon-aluminum powder is obtained by gas atomization.
[0063] In step 2, the iron-silicon powder is obtained by the same gas atomization method.
[0064] Step 3, sieving: sieve the iron-silicon-aluminum powder and the iron-silicon powder respectively, the iron-silicon-aluminum powder passes through the -120 mesh, -200 mesh, and -270 mesh respectively; the iron and silicon powder passes through the -200 mesh, -325 mesh.
[0065] Step 4, passivation treatment and insulation coating: respectively conduct passivation and insulation coating treatment on iron-silicon-aluminum powder and iron-silicon powder with different mesh numbers. First, pour a certain amount of FeSiAl powder into the mixer. After stirring for a few minutes, add phosphoric acid solution that has a passivation effect. , after the powder is dried, use si...
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