Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ferrite-coated FeSiAl metal magnetic powder core and preparation method thereof

A technology of ferrite and magnetic powder cores, applied in the field of ferrite-coated FeSiAl metal magnetic powder cores and its preparation, can solve the problems of easy cracking of the Mn-Zn ferrite insulating layer, increased eddy current loss, and reduced energy consumption , to achieve the effect of reducing magnetic dilution, reducing magnetic dilution, and solving the effect of large eddy current loss

Pending Publication Date: 2021-03-26
HANGZHOU DIANZI UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a high-temperature roasting process in this method, which is not conducive to reducing energy consumption and large-scale industrial production
And the formed Mn-Zn ferrite insulating layer is easily broken during the pressing process, resulting in increased eddy current loss

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
  • Ferrite-coated FeSiAl metal magnetic powder core and preparation method thereof
  • Ferrite-coated FeSiAl metal magnetic powder core and preparation method thereof
  • Ferrite-coated FeSiAl metal magnetic powder core and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Mix FeSiAl metal soft magnetic powder with FeCl 2 mixed with the aqueous solution of FeSiAl, heated to 80 °C, heated and stirred for 20 min, so that a layer of soluble FeCl was formed on the surface of FeSiAl metal soft magnetic powder. 2 , and dried at 90℃ for 20min to obtain FeSiAl metal soft magnetic powder@FeCl 2 ;Based on the total mass of FeSiAl metal soft magnetic powder, FeCl 2 The addition amount is 1wt%;

[0040] (2) The FeSiAl metal soft magnetic powder obtained in step (1) @FeCl 2 Mix with NaOH solution, stir evenly at room temperature (20°C), and dry at 90°C for 20 minutes to obtain insulating metal soft magnetic powder; based on the total mass of FeSiAl metal soft magnetic powder, the amount of NaOH added is 2wt%;

[0041] (3) Mix the insulating metal soft magnetic powder obtained in step (2) with epoxy resin and zinc stearate uniformly, press and form under 1500MPa pressure to obtain a blank with an outer diameter of 33.00mm, an inner diameter of 1...

Embodiment 2

[0045] (1) Mix FeSiAl metal soft magnetic powder with FeCl 2 mixed with the aqueous solution of FeSiAl metal powder, heated to 100 °C, heated and stirred for 40 min, so that a layer of soluble FeCl was formed on the surface of FeSiAl metal soft magnetic powder. 2 , and dried at 120 °C for 40 min to obtain FeSiAl metal soft magnetic powder@FeCl 2 ;Based on the total mass of FeSiAl metal soft magnetic powder, FeCl 2 The addition amount is 3wt%;

[0046] (2) The FeSiAl metal soft magnetic powder obtained in step (1) @FeCl 2 Mix with NaOH solution, stir evenly at room temperature (40°C), and dry at 120°C for 40 minutes to obtain insulating metal soft magnetic powder; based on the total mass of FeSiAl metal soft magnetic powder, the amount of NaOH added is 3wt%;

[0047] (3) Mixing the insulating metal soft magnetic powder obtained in step (2) with epoxy resin and zinc stearate uniformly, press molding under 2000MPa pressure to obtain a blank with an outer diameter of 33.00mm, a...

Embodiment 3

[0051] (1) The FeSiAl metal soft magnetic powder and FeSO 4 mixed with the aqueous solution of FeSiAl, heated to 80 °C, heated and stirred for 20 min to form a layer of soluble FeSO on the surface of FeSiAl metal soft magnetic powder 4 , and dried at 90℃ for 20min to obtain FeSiAl metal soft magnetic powder@FeSO 4 ;Based on the total mass of FeSiAl metal soft magnetic powder, FeSO 4 The addition amount is 1wt%;

[0052] (2) The FeSiAl metal soft magnetic powder obtained in step (1) @FeCl 2 Mix with KOH solution, stir evenly at room temperature, and dry at 90°C for 20 minutes to obtain insulating metal soft magnetic powder; based on the total mass of FeSiAl metal soft magnetic powder, the amount of KOH added is 2wt%;

[0053] (3) Mixing the insulating metal soft magnetic powder obtained in step (2) with water glass, barium stearate and zinc stearate uniformly, and pressing under pressure of 1500~2000MPa to obtain an outer diameter of 33.00mm and an inner diameter of 19.90mm ...

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
heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of magnetic materials, in particular to a ferrite-coated FeSiAl metal magnetic powder core and a preparation method thereof. The preparation method comprises the following steps of (1) mixing, heating, stirring and drying FeSiAl metal soft magnetic powder and an aqueous solution of soluble ferric salt; (2) mixing with a soluble hydroxide solution, stirring at normal temperature, and drying; (3) uniformly mixing with a binder and a lubricant, and carrying out compression molding to obtain a green body; and (4) carrying out heat treatment on the greenbody in vacuum or nitrogen or hydrogen, cooling and spraying to obtain the ferrite-coated FeSiAl metal magnetic powder core. The uniform iron hydroxide layer is formed on the outer surface of the FeSiAl metal soft magnetic powder through a chemical co-deposition method, the iron hydroxide layer is converted into the compact and uniform ferrite insulating layer through compression molding and high-temperature heat treatment, breakage of the ferrite insulating layer in the pressing process is avoided, the ferrite insulating layer on the outer layer is ferromagnetic, the magnetic dilution effectcan be reduced, and the magnetic performance of the composite material is further improved.

Description

technical field [0001] The invention relates to the technical field of magnetic material manufacturing, in particular to a ferrite-coated FeSiAl metal magnetic powder core and a preparation method thereof. Background technique [0002] Metal soft magnetic powder core is a new type of composite material made of ferromagnetic particles and insulating medium. Metal soft magnetic powder cores have the advantages of high saturation magnetic induction and effective permeability, low loss, good DC bias performance and frequency stability, and are widely used in various electronic devices. [0003] Insulation coating is the key process of metal magnetic powder core, which is mainly divided into organic insulation coating and inorganic insulation coating. Because organic matter is not resistant to high temperature annealing, and the magnetic powder core coated with organic matter will age after working for a long time. Therefore, the inorganic insulating coating process is currentl...

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): H01F1/147H01F1/24H01F41/02
CPCH01F1/14791H01F1/24H01F41/0246
Inventor 张雪峰刘先国李忠李红霞孙玉萍
Owner HANGZHOU DIANZI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com