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Composite soft magnetic material and method for preparing material

A composite soft magnetic and soft magnetic alloy technology, applied in the direction of inorganic material magnetism, metal material coating process, liquid chemical plating, etc. The atmosphere is difficult to take care of other issues at the same time to achieve the effects of good mechanical properties, high magnetic permeability, and high saturation magnetic induction

Active Publication Date: 2014-03-12
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Therefore, when using the methods disclosed in JP-A-56-38402 and Chinese patent CN 101246773B to prepare composite sintered soft magnetic materials, the sintering atmosphere is difficult to take care of both materials at the same time, which will inevitably affect the performance of composite sintered soft magnetic materials
[0008] At the same time, whether it is Japanese Patent Laid-Open No. 56-38402 that fills the ferrite powder between the metal powders, or Chinese Patent No. CN 101246773 B that mixes the two powders for ball milling, it is difficult to ensure that the ferrite powder is in the soft magnetic field of the metal. Uniform distribution in the powder, which ultimately affects the properties of the material

Method used

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  • Composite soft magnetic material and method for preparing material

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Embodiment 1

[0035] This embodiment mainly includes two steps, the first step, the preparation of the soft magnetic ferrite composite powder that is coated with metal soft magnetic powder: (1) the composition is Mn 0.64 Zn 0.29 Fe 2.07 o 4The soft magnetic ferrite is crushed into powder particles of 30-50μm, and the crushing method is mechanical crushing. First, it is coarsely crushed into small particles of 0.5-2mm, and then ball milling is used. (2) adding the soft magnetic ferrite powder after ball milling into the prepared roughening solution, the composition of the roughening solution is a mixed solution of potassium fluoride and hydrofluoric acid, wherein the concentration of potassium fluoride is 0.3wt%, The concentration of hydrofluoric acid was 1.6 vol%. After ultrasonic oscillation at room temperature for 15 minutes, the powder was taken out, washed with deionized water, and dried in a vacuum drying oven. (3) Put the roughened dry powder into a certain amount of sensitization ...

Embodiment 2

[0040] The present embodiment mainly comprises two steps, and the first step, the preparation of the soft magnetic ferrite composite powder of coated metal soft magnetic powder: (1) make composition into Ni 0.5 Zn 0.5 Fe 2.04 o 4 The soft magnetic ferrite is crushed into powder particles of 30-50μm, and the crushing method is mechanical crushing. First, it is coarsely crushed into small particles of 0.5-2mm, and then ball milling is used. (2) adding the soft magnetic ferrite powder after ball milling into the prepared roughening solution, the composition of the roughening solution is a mixed solution of potassium fluoride and hydrofluoric acid, wherein the concentration of potassium fluoride is 0.3wt%, The concentration of hydrofluoric acid was 1.6 vol%. After ultrasonic oscillation at room temperature for 15 minutes, the powder was taken out, washed with deionized water, and dried in a vacuum drying oven. (3) Put the roughened dry powder into a certain amount of sensitizat...

Embodiment 3

[0044] The present embodiment mainly comprises two steps, and the first step, the preparation of the soft magnetic ferrite composite powder of coated metal soft magnetic powder: (1) make composition into Ni 0.4 Zn 0.5 Cu 0.1 Fe 2.04 o 4 The soft magnetic ferrite is crushed into powder particles of 30-50μm, and the crushing method is mechanical crushing. First, it is coarsely crushed into small particles of 0.5-2mm, and then ball milling is used. (2) adding the soft magnetic ferrite powder after ball milling into the prepared roughening solution, the composition of the roughening solution is a mixed solution of potassium fluoride and hydrofluoric acid, wherein the concentration of potassium fluoride is 0.1wt%, The concentration of hydrofluoric acid is 0.9vol%. After ultrasonic vibration at room temperature for 10 minutes, the powder is taken out, washed with deionized water, and then put into a vacuum drying oven for drying. (3) Put the roughened dry powder into a certain a...

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Abstract

The invention discloses a composite soft magnetic material and a method for preparing the material. The composite soft magnetic material is composed of soft magnetic ferrite powder and a soft magnetic alloy film, wherein the particle size of the soft magnetic ferrite powder ranges from 10 microns to 120 microns, the soft magnetic alloy film wraps the surface of the soft magnetic ferrite particles, and the thickness of the soft magnetic alloy film ranges from 0.01 micron to 10 microns. According to the composite material, due to the fact that the metal soft magnetic film wraps the surface of the soft magnetic ferrite powder particles, the obtained composite soft magnetic particles are sintered to obtain the composite soft magnetic material. The material not only has high saturation induction intensity, but also has high magnetic permeability. The material has the features of both soft magnetic ferrite and metal soft magnetic material, and meanwhile the material has good mechanical performance and is mainly applied to the medium-high frequency field.

Description

technical field [0001] The invention relates to a composite soft magnetic material and a method for preparing the material, in particular to a sintered soft magnetic material composed of soft ferrite powder particles coated with a metal soft magnetic film on the surface and a preparation method thereof, belonging to the magnetic material field. technical background [0002] The commonly used soft magnetic materials mainly include electrical pure iron, silicon steel sheets, iron-nickel alloys, ferrites, and amorphous and nanocrystalline materials. Electrical pure ferromagnetic properties and mechanical properties are excellent (high magnetic permeability, high saturation magnetic induction (-2T), mechanical strength), but the electrical properties are poor (low resistivity), and the eddy current loss is large under the alternating field, which cannot meet the requirements. Used under the condition of alternating electromagnetic field; silicon steel sheet has excellent magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/36B22F1/02C23C18/50C23C18/18
Inventor 杨红川谢佳君鲁帅胡权霞吕彬彬杨远飞李扩社于敦波
Owner GRIREM ADVANCED MATERIALS CO LTD
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