Method for preparing soft magnetic composite material through hot pressing

A composite material and soft magnetic technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of lower energy utilization rate, high price, eddy current loss, etc., to improve energy utilization rate, good The effect of magnetic properties and excellent mechanical properties

Inactive Publication Date: 2014-06-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the steel sheet needs to consume a lot of energy during the preparation process, and because the material is rigid, it is expensive just now, and it is easy to generate eddy current loss during the use of electrical devices after the device is made, reducing the The energy utilization rate and shorten the service life of the period, and the soft magnetic material prepared by the steel sheet is difficult to shape in the later application process, and it is difficult to prepare a sample with a slightly complicated shape

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
  • Method for preparing soft magnetic composite material through hot pressing
  • Method for preparing soft magnetic composite material through hot pressing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Weigh 100g of iron-silicon alloy particles with a particle size of 30μm into a 1000mL conical flask, add 500mL of medium (ethanol: distilled water=4:1) to the conical flask, and ultrasonically disperse for 15min;

[0037] Heat and stir the Erlenmeyer flask in a 60℃ water bath. After 30 minutes, add 0.2g of silane coupling agent KH-560, continue to heat and stir, and react for 4h~5h;

[0038] Take out the Erlenmeyer flask and separate it with a magnet. Place the magnet on the bottom of the beaker. After the magnetic particles quickly settle to the bottom, slowly pour out the solution, leaving only the magnetic particles, and then wash the separated magnetic nanoparticles with absolute ethanol for 5-6 times under the action of a magnetic field. Thoroughly wash away the unreacted silane coupling agent.

[0039] Place the washed magnetic particles in a vacuum drying oven for drying. After the drying is sufficient, the soft magnetic particles modified by the coupling agent are...

Embodiment 2

[0049] 1) Weigh 100g of ferrite particles with a particle size of 2μm and pour into a 1000mL conical flask, add 500mL of medium (ethanol:distilled water=4:2) to the conical flask, and ultrasonically disperse for 15min;

[0050] Heat and stir the Erlenmeyer flask in a 60°C water bath. After 30 minutes, add 0.1 g of silane coupling agent KH-550, continue to heat and stir, and react for 4 hours;

[0051] Take out the Erlenmeyer flask and separate it with a magnet. Place the magnet on the bottom of the beaker. After the magnetic particles quickly settle to the bottom, slowly pour out the solution, leaving only the magnetic particles, and then wash the separated magnetic nanoparticles 5 times with absolute ethanol under the action of a magnetic field to fully wash Remove unreacted silane coupling agent KH-550.

[0052] Place the washed magnetic particles in a vacuum drying oven for drying. After being dried sufficiently, the soft magnetic particles modified by the coupling agent are obt...

Embodiment 3

[0061] 1) Weigh 100g of iron-silicon alloy particles with a particle size of 200μm and pour it into a 1000mL conical flask, add 500mL of medium (ethanol: distilled water=4:1) to the conical flask, and ultrasonically disperse for 15min;

[0062] Heat and stir the conical flask in a water bath at 60°C. After 30 minutes, add 0.1 g of oleic acid, continue to heat and stir, and react for 4 hours;

[0063] Take out the Erlenmeyer flask and separate it with a magnet. Place the magnet on the bottom of the beaker. After the magnetic particles quickly settle to the bottom, slowly pour out the solution, leaving only the magnetic particles, and then wash the separated magnetic nanoparticles with absolute ethanol for 5-6 times under the action of a magnetic field. Thoroughly wash away unreacted oleic acid.

[0064] Place the washed magnetic particles in a vacuum drying oven for drying. After being dried sufficiently, grind to obtain soft magnetic particles modified with oleic acid.

[0065] 2) A...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

A method for preparing a soft magnetic composite material through hot pressing includes the following steps: dispersing particle soft magnetic powder into a dispersing medium, adding a coupling agent to conduct surface processing, conducting separation to obtain magnetic powder wrapping the coupling agent, conducting washing and drying through absolute ethyl alcohol to obtain the coupling agent modified magnetic powder, mixing the epoxy resin and an epoxy hardener to obtain an epoxy resin system mixture, mixing the coupling agent modified magnetic powder and the epoxy resin system mixture according to the proportion to obtain mixed slurry containing the magnetic powder and the epoxy resin system mixture, pouring the mixed slurry into a container, conducting vacuumizing, arranging the container into a constant temperature oven to conduct procuring to obtain composite slurry obtained through procuring, transferring the procured composite slurry into a mould, and conducting solidification and die pressing through a hog pressing machine to obtain the soft magnetic composite material. The method is simple in process, low in cost, favorable for operation and capable of achieving good magnetic performance and dynamic strength of the composite material by adjusting the content of the magnetic powder. The shape is controllable, and the mechanical performance is good.

Description

Technical field [0001] The invention belongs to the technical field of soft magnetic composite materials and preparation and application. Specifically, the present invention relates to a method for preparing a novel soft magnetic composite material. Background technique [0002] With the development of science, soft magnetic materials are used in more and more fields, such as inductors, stators and rotors in sensor motors, Hall devices, actuators, and core materials in transformer cores. Traditionally, soft magnetic cores such as stators in motors and magnetic rings in Hall devices are made of stacked steel sheets. [0003] However, the steel sheet needs to consume a lot of energy during the preparation process, and because this material is a rigid material, first of all, it is expensive, and it is easy to produce eddy current loss during the use of electrical devices after the device is made. Energy utilization and shorten the service life during the period, and the soft magneti...

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 Applications(China)
IPC IPC(8): B22F3/14B22F1/00H01F1/22H01F41/02
Inventor 付绍云田建伟肖红梅李峻青黄贵文
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap