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A kind of nanocrystalline soft magnetic composite material and preparation method thereof

A technology of nanocrystalline soft magnetic and composite materials, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the complex process of nanocrystalline soft magnetic composite materials, large eddy current loss of soft magnetic composite materials, magnetic Low conductivity and other issues, to achieve the effect of excellent DC bias characteristics, guaranteed performance, and excellent magnetic properties

Active Publication Date: 2016-11-23
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the current research, nanocrystalline magnetic powder is generally obtained by crushing strips, and the process of preparing nanocrystalline soft magnetic composite materials is relatively complicated.
A large number of non-magnetic substances were added during the preparation process, resulting in low magnetic permeability of the prepared soft magnetic composite material
In addition, the surface of the powder obtained by crushing the strip is uneven, and it is difficult to form a uniform insulating coating, so that the soft magnetic composite material has a large eddy current loss and poor magnetic properties.

Method used

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  • A kind of nanocrystalline soft magnetic composite material and preparation method thereof
  • A kind of nanocrystalline soft magnetic composite material and preparation method thereof
  • A kind of nanocrystalline soft magnetic composite material and preparation method thereof

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Embodiment 1

[0023] In this embodiment, the molecular formula of the alloy that constitutes the nanocrystalline soft magnetic composite material is Fe 71 Cu 1 Nb 2.9 Si 14 B 11 Dy 0.1 , the following are the specific preparation steps:

[0024] (1) Alloy melting: soft magnetic alloys are melted in a vacuum melting furnace;

[0025] (2) Atomized powder making: Spray the smelted alloy directly with nitrogen gas to obtain amorphous soft magnetic powder, and sieve to obtain a powder of less than 100 mesh;

[0026] (3) Particle size ratio: The obtained amorphous powder is classified into -400 mesh, -300 mesh, -200 mesh, -100 mesh and then mixed. The mass percentage of the mixed powder is: -100~+200 mesh 30%, -200~+300 mesh accounted for 50%, -300~+400 mesh accounted for 15%, -400 mesh accounted for 5%;

[0027] (4) Passivation treatment: Mix the amorphous powder with a good particle size ratio and phosphoric acid alcohol diluent evenly. The amount of phosphoric acid alcohol diluent is 10...

Embodiment 2

[0034] In this embodiment, the molecular formula of the alloy that constitutes the nanocrystalline soft magnetic composite material is Fe 75 Cu 2 Nb 2 P 3 Si 10 B 5 Dy 1 La 1 PR 1 , the following are the specific preparation steps:

[0035] (1) Alloy melting: soft magnetic alloys are melted in a vacuum melting furnace;

[0036] (2) Atomized powder making: Spray the smelted alloy directly with nitrogen gas to obtain amorphous soft magnetic powder, and sieve to obtain a powder of less than 100 mesh;

[0037] (3) Particle size ratio: The obtained amorphous powder is classified into -400 mesh, -300 mesh, -200 mesh, -100 mesh and then mixed. The mass percentage of the mixed powder is: -100~+200 mesh 40%, -200~+300 mesh accounted for 25%, -300~+400 mesh accounted for 10%, -400 mesh accounted for 25%;

[0038] (4) Passivation treatment: Mix the amorphous powder with a good particle size ratio and acetone phosphate diluent evenly. The amount of acetone phosphate diluent is 5...

Embodiment 3

[0045] In this embodiment, the molecular formula of the alloy that constitutes the nanocrystalline soft magnetic composite material is Fe 75 Cu 3 P 1 Si 10 B 10 Ho 0.5 Yb 0.5 , the following are the specific preparation steps:

[0046] (1) Alloy melting: soft magnetic alloys are melted in a vacuum melting furnace;

[0047] (2) Atomized powder making: Spray the smelted alloy directly with nitrogen gas to obtain amorphous soft magnetic powder, and sieve to obtain a powder of less than 100 mesh;

[0048] (3) Particle size ratio: The obtained amorphous powder is classified into -400 mesh, -300 mesh, -200 mesh, -100 mesh and then mixed. The mass percentage of the mixed powder is: -100~+200 mesh 20%, -200~+300 mesh accounted for 30%, -300~+400 mesh accounted for 30%, - 400 mesh accounted for 20%;

[0049] (4) Passivation treatment: Mix the amorphous powder with a good particle size ratio and phosphoric acid aqueous solution evenly. The amount of phosphoric acid aqueous solut...

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Abstract

The invention discloses a nanocrystalline soft magnetic composite material and a preparation method thereof. The alloy composition constituting the nanocrystalline soft magnetic composite material is an iron-based nanocrystalline alloy, and the composition of the alloy satisfies the following formula in terms of atomic ratio: Fe 100‑a‑b‑c‑d Cu a T b m c D. d , where, 1≤a≤3, 15≤b≤25, 1≤c≤5, 0

Description

technical field [0001] The invention relates to a nanocrystalline soft magnetic composite material and a preparation method thereof, belonging to the technical field of soft magnetic materials. Background technique [0002] Soft magnetic material is a kind of magnetic functional material, which has the characteristics of high saturation magnetization, high magnetic permeability, low coercive force, etc., and is widely used in the power electronics industry. There are three main types of soft magnetic materials: metal soft magnetic materials, soft magnetic composite materials, and ferrite. Metal soft magnetic materials have good comprehensive magnetic properties and low resistivity, and are generally suitable for low-frequency applications; ferrite is a ferrimagnetic material with low saturation magnetic induction, and generally has a large volume when applied, but ferrite The resistivity is very high, which can be applied to high-frequency occasions; the soft magnetic compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147B22F1/00C22C38/16C21D1/26C22C33/02
Inventor 严密郭婷吴琛姜银珠樊波张彪
Owner ZHEJIANG UNIV
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