Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of high magnetic permeability and low loss soft magnetic composite material and its magnetic ring

A soft magnetic composite material, high permeability technology, applied in the direction of inorganic material magnetism, magnetic core manufacturing, inductor/transformer/magnet manufacturing, etc. The effect of few process steps and simple process

Active Publication Date: 2021-05-28
CHINA JILIANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But obviously, the magnetic permeability of soft magnetic composite materials is still low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high magnetic permeability and low loss soft magnetic composite material and its magnetic ring
  • Preparation method of high magnetic permeability and low loss soft magnetic composite material and its magnetic ring
  • Preparation method of high magnetic permeability and low loss soft magnetic composite material and its magnetic ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Raw material preparation

[0042] The spherical Fe particles were obtained by gas atomization, and the spherical Fe particles were used as the main magnetic phase; the interface phase was Mn-Zn ferrite; the mass fraction of Fe was 96wt.%; the mass fraction of Mn-Zn ferrite was 4wt. %; The average particle diameter of Fe particles is 30 microns, and the average particle diameter of Mn-Zn ferrite is 20 nanometers;

[0043] 2) Insulation coating of soft magnetic alloy particles

[0044] After the spherical Fe particles are passivated, they are fully mixed with Mn-Zn ferrite to form a mixed powder; to realize the insulating coating of the spherical Fe particles by the Mn-Zn ferrite; to form a magnetic oxide particle layer outside the spherical Fe particles ;

[0045] 3) Magnetic field orientation forming

[0046] The mixed powder in step 2) is packed into a ring mold and pressed into a magnetic ring, and an external magnetic field is applied during the forming of the ...

Embodiment 2

[0056] 1) Raw material preparation

[0057] Spherical Fe-Si particles were obtained by gas atomization, and the spherical Fe-Si particles were used as the main magnetic phase; the interface phase was Ni-Zn ferrite; the mass fraction of spherical Fe-Si particles was 90wt.%; Ni-Zn ferrite The mass fraction of body is 10wt.%;

[0058] 2) Insulation coating of soft magnetic alloy particles

[0059] After the spherical Fe-Si particles are passivated, they are fully mixed with Ni-Zn ferrite to form a mixed powder, and the Ni-Zn ferrite realizes the insulation coating of the Fe-Si particles;

[0060] 3) Magnetic field orientation forming

[0061] Put the mixed powder in step 2) into a ring mold and press to form a magnetic ring. During the forming process of the magnetic ring, an external magnetic field is applied for orientation. The magnetic field is generated by an electromagnet; the external magnetic field is parallel to the plane of the working magnetic circuit and perpendicul...

Embodiment 3

[0068] 1) Raw material preparation

[0069] Spherical Fe-Ni particles were obtained by gas atomization, and the spherical Fe-Ni particles were used as the main magnetic phase; the interface phase was Mg-Zn ferrite; the mass fraction of spherical Fe-Ni particles was 92wt.%; Mg-Zn ferrite The mass fraction of body is 8wt.%;

[0070] 2) Insulation coating of soft magnetic alloy particles

[0071] After the spherical Fe-Ni particles are passivated, they are fully mixed with Mg-Zn ferrite to form a mixed powder; to realize the insulation coating of Fe-Ni particles by Mg-Zn ferrite;

[0072] 3) Magnetic field orientation forming

[0073] Put the mixed powder in step 2) into a ring mold and press it into a magnetic ring. During the forming process of the magnetic ring, an external magnetic field is applied for orientation. The external magnetic field is generated by an electromagnet; the external magnetic field is parallel to the plane of the working magnetic circuit and perpendicu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
magnetic flux densityaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a soft magnetic composite material with high magnetic permeability and low loss. Spherical soft magnetic alloy particles are coated with a magnetic oxide particle layer to form a mixed powder; the mixed powder is loaded into a mold so that the mixed powder is pressed Forming; applying an external magnetic field to the mixed powder in the forming process, the magnetic field is parallel to the working magnetic circuit plane and perpendicular to the normal direction of the working magnetic circuit plane; stress relief annealing to obtain soft magnetic composite materials. The technical solution is very simple, there are no strict requirements on magnetic powder and equipment, and there is no need to make major improvements to existing equipment, only need to add external magnetic field application equipment to achieve high performance of soft magnetic materials; soft magnetic alloys and The magnetic oxides are asymmetrically distributed in the horizontal and vertical directions of the magnetic ring, resulting in higher magnetic permeability and lower loss in the direction of the working magnetic circuit; the present invention can quickly realize soft magnetic composite due to less equipment, less process steps and simple process. Industrial applications of materials.

Description

technical field [0001] The invention relates to the field of magnetic material preparation, in particular to a method for preparing a soft magnetic composite material with high magnetic permeability and low loss and a magnetic ring thereof. Background technique [0002] Soft magnetic materials have low coercive force and high magnetic permeability, so they are easy to magnetize and demagnetize, and are widely used in energy conversion and communication equipment. [0003] The most significant disadvantage of soft magnetic composite materials is that the magnetic particles are separated by non-magnetic materials, the magnetic circuit is cut off, and the magnetic permeability is low. At present, many technologies have used magnetic oxides to replace traditional insulating media, which can not only increase the resistivity, but also not increase the reluctance of the magnetic circuit much, and reduce the loss of magnetic permeability. But obviously, the magnetic permeability o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/33H01F7/00H01F27/255
CPCH01F41/02H01F41/0246H01F41/0206H01F1/33H01F7/00H01F27/255
Inventor 彭晓领李静王新庆葛洪良杨艳婷徐靖才金红晓金顶峰洪波
Owner CHINA JILIANG UNIV