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

A high-frequency high-impedance iron-poor manganese-zinc ferrite and its preparation method

A manganese-zinc ferrite, high-impedance technology, applied in the direction of inorganic material magnetism, etc., can solve the problems of low saturation magnetic induction and Curie temperature, limited anti-EMI ability, low impedance, etc., to achieve high magnetic permeability, Good high impedance performance, the effect of improving permeability

Active Publication Date: 2021-09-17
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF14 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to overcome the problem that the ferrite material in the prior art has low impedance at high frequency, low saturation magnetic induction and low Curie temperature, so the anti-EMI ability of the EMI-suppressing components made by it is limited, and provides A high-frequency high-impedance iron-poor manganese-zinc ferrite and its preparation method, through formula development and trace element modification, and improving the preparation method, it has high magnetic permeability and high saturation magnetic induction at high frequency And high-impedance high-performance anti-EMI manganese-zinc soft ferrite material

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
  • A high-frequency high-impedance iron-poor manganese-zinc ferrite and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A method for preparing a high-frequency and high-impedance poor iron-manganese-zinc ferrite, comprising the steps of:

[0042] (1) Ingredients and sanding: weigh 48.6% Fe by mole percentage 2 O 3 , 32.8% MnO, 17.5% ZnO and 1.1% Co 2 O 3 Four main components, put into a sand mill, add deionized water for mixing and crushing for 40 minutes, and then spray and granulate to obtain spray material after uniform mixing;

[0043] (2) Pre-sintering: put the spray material into the pre-sintering furnace of the rotary kiln, and carry out pre-sintering at 800 ° C to obtain the pre-sintering material, and the feeding amount is 250kg / h;

[0044] (3) Secondary sanding: Add additive to pre-sintered material: 50ppm SiO 2 , 500ppm CaCO 3 , 200ppm Bi 2 O 3 , 200ppm ZrO 2 , 400ppm TiO 2 , and then add deionized water and put it into a sand mill for secondary sand grinding to obtain secondary sand abrasive. ;

[0045] (4) Spray granulation and molding: add 0.08wt% of PVA by weigh...

Embodiment 2

[0052] A method for preparing a high-frequency and high-impedance poor iron-manganese-zinc ferrite, comprising the steps of:

[0053] (1) Ingredients and sanding: weigh 47.8% Fe by mole percentage 2 O 3 , 36% MnO, 15% ZnO and 1.2% Co 2 O 3 The four main components are put into a sand mill and deionized water is added for mixing and crushing for 30 minutes. After uniform mixing, spray granulation is carried out to obtain a spray material;

[0054] (2) Pre-sintering: put the spray material into the pre-sintering furnace of the rotary kiln, and carry out pre-sintering at 750 ° C to obtain the pre-sintering material, and the feeding amount is 200 kg / h;

[0055] (3) Secondary sanding: Add additive to pre-sintered material: 10ppm SiO 2 , 200ppm CaCO 3 , 100ppm Bi 2 O 3 , 100ppm ZrO 2 , 100ppm TiO 2 , and then add deionized water and put it into a sand mill for secondary sanding to obtain secondary sand abrasives. The feeding amount is 200kg / h (calculated as dry powder), and...

Embodiment 3

[0063] A method for preparing a high-frequency and high-impedance poor iron-manganese-zinc ferrite, comprising the steps of:

[0064] (1) Ingredients and sanding: weigh 49.8% Fe by mole percentage 2 O 3 , 31% MnO, 18.5% ZnO and 0.7% Co 2 O 3 The four main components are put into a sand mill and deionized water is added for mixing and crushing for 50 minutes. After uniform mixing, spray granulation is carried out to obtain a spray material;

[0065] (2) Pre-sintering: put the spray material into the pre-sintering furnace of the rotary kiln, and carry out pre-sintering at 900 ° C to obtain the pre-sintering material, and the feeding amount is 300 kg / h;

[0066] (3) Secondary sanding: Add additives to the pre-sintered material: 100ppm SiO 2 , 1000ppm CaCO 3 , 300ppmBi 2 O 3 , 300ppm ZrO 2 , 600ppm TiO 2 , and then add deionized water and put it into a sand mill for secondary sanding to obtain secondary sand abrasives. The feed amount is 250kg / h (calculated as dry powder)...

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 diameteraaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of soft ferrite, and discloses a high-frequency and high-impedance poor iron-manganese-zinc ferrite and a preparation method thereof. 2 O 3 , 31~36%MnO, 15~18.5%ZnO and 0.7~2%Co 2 O 3 ; Additives include 10~100ppm SiO 2 , 200~1000ppm CaCO 3 , 100~300ppm Bi 2 O 3 , 100~300ppm ZrO 2 and 100~600ppm TiO 2 . In the present invention, Co is added to the main component 2 O 3 , and reasonably adjust the proportion of each main component, and add additives for modification at the same time, the prepared iron-manganese-zinc ferrite has high magnetic permeability, high saturation magnetic induction intensity and high impedance at high frequency.

Description

technical field [0001] The invention relates to the technical field of soft ferrite, in particular to a high-frequency and high-impedance poor iron-manganese-zinc ferrite and a preparation method thereof. Background technique [0002] With the increasing development of electronic technology, especially the rapid development of digital technology. Countries around the world attach great importance to the ability of electronic equipment to resist EMI. How to effectively reduce the electromagnetic wave interference of electronic equipment has become a common concern of researchers. Various EMI suppression components are made of soft ferrite, which are widely used in various electronic devices to prevent unwanted signal feedback and coupling, avoid parasitic oscillations, and effectively suppress conduction and radiation noise. Among the many anti-electromagnetic interference measures, the EMI power filter is a very effective device. It consists of passive components (L, R, C) ...

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): H01F1/34C04B35/26C04B35/64
CPCC04B35/265C04B35/64C04B2235/3206C04B2235/3232C04B2235/3244C04B2235/3262C04B2235/3275C04B2235/3284C04B2235/3298C04B2235/3418C04B2235/661C04B2235/662
Inventor 肖时勇张政王朝明赵旭杜阳忠
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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