A kind of amorphous nanocrystalline composite magnetic powder core and preparation method thereof
An amorphous, nanocrystalline, and magnetic powder core technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, and magnetic objects, can solve the problem of low saturation magnetic induction and magnetic permeability, reduced magnetic particle content, and DC magnetic flux density. Low-level problems, to achieve the effect of improving magnetic and mechanical properties, excellent soft magnetic properties, and ensuring insulation effects
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Embodiment 1
[0034] The amorphous nanocrystalline composite magnetic powder core provided in this embodiment is mainly composed of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder and insulating agent, and the weight of organic binder and insulating agent accounts for two powders respectively 0.5~2wt% and 0.5~4wt% of the total weight; and the insulating agent is a mixture of inorganic oxides, carbides and nitrides. The inorganic oxide is selected from SiO 2、 al 2 o 3、 TiO 2、 ZrO 2One or more; the carbide is selected from one or both of AlC and TiC; the nitride is selected from one or both of AlN and TiN. The insulating agents are all nano powders.
[0035] The iron-based amorphous powder is made of amorphous Fe that passes through -200~+270 mesh 80 Si 12.6 B 5.4 C 2 Powder, the iron-based nanocrystalline powder adopts nanocrystalline Fe passing through -270~+325 mesh 73.5 Cu 1 Nb 3 Si 13.5 B 9 Powder, organic binder adopts phenolic resin.
[003...
Embodiment 2
[0060] The amorphous nanocrystalline composite magnetic powder core provided in this embodiment is mainly composed of iron-based amorphous powder, iron-based nanocrystalline powder, organic binder and insulating agent, and the weight of organic binder and insulating agent accounts for two powders respectively 1wt% and 2wt% of the total weight.
[0061] The iron-based amorphous powder is made of amorphous Fe that passes through -200~+270 mesh 80 Si 12.6 B 5.4 C 2 Powder, the iron-based nanocrystalline powder adopts nanocrystalline Fe passing through -270~+325 mesh 73.5 Cu 1 Nb 3 Si 13.5 B 9 Powder, organic binder adopts epoxy resin, insulating agent adopts ZrO 2 , AlC, TiN mixture, the weight ratio of the three is 5:4:1.
[0062] The weight content of the iron-based amorphous powder in the two powders is 15-60wt%, and that of the iron-based nanocrystalline powder is 40-85wt%.
[0063] Specifically, iron-based amorphous Fe a (Si b B 1-b ) 98-a C 2 In the powder, a...
Embodiment 3
[0074] The difference between the amorphous nanocrystalline composite magnetic powder core provided in this example and Example 1 is that the iron-based amorphous powder uses Fe 80 Si 7.2 B 10.8 C 2 powder. Specifically, iron-based amorphous Fe a (Si b B 1-b ) 98-a C 2 In the powder, a is 80, and b is 0.4.
[0075] In this embodiment, the proportions of the two powders were changed to obtain 4 examples, marked as 5-8. The contents of iron-based amorphous powder and iron-based nanocrystalline powder in each example are as described in Table 2.
[0076]The preparation method of the above-mentioned amorphous nanocrystalline composite magnetic powder core provided in this embodiment differs from that of Example 2 in that the iron-based amorphous strip is made of Fe 80 Si 7.2 B 10.8 C 2 Made of iron-based amorphous powder.
[0077] Performance test: Detect the magnetic performance of the magnetic core and record it in Table 2.
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Abstract
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