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Amorphous magnetic powder core precursor particle, amorphous magnetic powder core and preparation method thereof

A magnetic powder core and precursor technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problems of amorphous magnetic powder core magnetic permeability and saturation magnetic induction intensity reduction, unfavorable miniaturization of electronic components, etc., to improve Magnetic permeability, high magnetic permeability, and the effect of miniaturization

Active Publication Date: 2021-06-25
NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the preparation process of traditional amorphous magnetic powder cores, in order to improve its high-frequency performance and reduce magnetic loss, a large amount of non-magnetic substances such as insulating agents, binders, and passivators are added during the preparation process, resulting in amorphous magnetic powder cores The magnetic permeability and saturation magnetic induction of the core are reduced, which is not conducive to the miniaturization of electronic components

Method used

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  • Amorphous magnetic powder core precursor particle, amorphous magnetic powder core and preparation method thereof
  • Amorphous magnetic powder core precursor particle, amorphous magnetic powder core and preparation method thereof
  • Amorphous magnetic powder core precursor particle, amorphous magnetic powder core and preparation method thereof

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preparation example Construction

[0035]The present invention further provides a method for preparing the amorphous magnetic powder core, comprising:

[0036] S1, providing the amorphous alloy particles;

[0037] S2, coating the amorphous alloy particles with the nano soft magnetic ferrite powder and a binder to obtain the amorphous magnetic powder core precursor particles;

[0038] S3, pressing and molding the amorphous magnetic powder core precursor particles to obtain a shaped amorphous magnetic powder core precursor;

[0039] S4, performing a stress relief annealing treatment on the shaped amorphous magnetic powder core precursor to obtain the amorphous magnetic powder core.

[0040] In step S1, the amorphous alloy particles can be obtained by crushing amorphous strips, water atomization or gas atomization.

[0041] In step S2, the nano soft magnetic ferrite powder and binder are mixed and coated on the surface of the amorphous alloy particles. The amorphous alloy particles can be coated by a dispersion...

Embodiment 1

[0053] Select the Fe prepared by gas atomization method 76 Si 9 B 10 P 5 Amorphous alloy particles, with a 200-mesh sieve for Fe 76 Si 9 B 10 P 5 The amorphous alloy particles were sieved, and the Fe 76 Si 9 B 10 P 5 The morphology of amorphous alloy particles was analyzed, such as figure 1 As shown, it can be seen that Fe 76 Si 9 B 10 P 5 Amorphous alloy particles present a spherical shape with a smooth surface and no obvious defects such as holes and holes; the structure is detected by X-ray diffractometer (XRD), and the results are as follows: figure 2 As shown, it can be seen that there is no diffraction peak corresponding to any crystal on the XRD spectrum, only a broad diffuse scattering peak, indicating that the Fe used 76 Si 9 B 10 P 5 Amorphous alloy particles are completely amorphous.

[0054] to Fe 76 Si 9 B 10 P 5 The amorphous alloy particles are subjected to insulation coating treatment, and 1% of nano-nickel-zinc soft magnetic ferrite pow...

Embodiment 2

[0059] This embodiment is basically the same as Embodiment 1, except that the mass percentage of the nano-nickel-zinc soft ferrite powder is 2%.

[0060] After testing, the magnetic permeability of the amorphous magnetic powder core at a frequency of 100kHz is 102, and at the same time, the frequency stability is excellent, such as image 3 Shown; the loss of magnetic powder core is very low, under the condition of 50kHz, 0.1T, the loss is 711mW / cm 3 .

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Abstract

A precursor particle of an amorphous magnetic powder core, comprising an amorphous alloy particle and a cladding layer coated on the surface of the amorphous alloy particle; the amorphous alloy particle is Fe a Si b B c P d Nb e x f , wherein, a=100‑b‑c‑d‑e‑f, b is 7 to 15, c is 7 to 20, d is 3 to 6, e is 0 to 3, f is 0 to 2; The coating includes nano soft ferrite powder and binder. The invention further provides an amorphous magnetic powder core and a preparation method thereof. Although the magnetic permeability of the amorphous magnetic powder core provided by the invention is greatly improved, its magnetic loss will not increase accordingly, and it has high magnetic permeability, low magnetic loss and high saturation magnetic induction.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to an amorphous magnetic powder core precursor particle, an amorphous magnetic powder core and a preparation method thereof. Background technique [0002] Amorphous magnetic powder cores have the characteristics of constant magnetic permeability, high resistivity, and good temperature stability at high frequencies. It is an important development direction and has gradually become a research and application hotspot in recent years. [0003] However, in the preparation process of traditional amorphous magnetic powder cores, in order to improve its high-frequency performance and reduce magnetic loss, a large amount of non-magnetic substances such as insulating agents, binders, and passivators are added during the preparation process, resulting in amorphous magnetic powder cores The magnetic permeability and saturation magnetic induction of the core are reduced, which is not conducive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153H01F1/33B22F1/02
CPCH01F1/15308H01F1/15383H01F1/33B22F1/16
Inventor 董亚强常春涛李小龙刘珉王新敏
Owner NINGBO INNOVATION CENT FOR APPLIED MAGNETICS CO LTD
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