High saturated magnetic flux density and low loss manganese-zinc ferrite material and its preparing method

A technology of manganese-zinc ferrite and magnetic flux density, applied in the direction of magnetism of inorganic materials, can solve the problems of easy agglomeration and high cost of raw materials, and achieve the effects of simple addition, simple preparation method and low cost

Active Publication Date: 2006-03-22
ZHEJIANG UNIV +1
View PDF0 Cites 36 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although nanoscale auxiliary components can better reduce the power consumption of materials, there are disadvantages such as easy agglomeration and high cost of raw materials.

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
  • High saturated magnetic flux density and low loss manganese-zinc ferrite material and its preparing method
  • High saturated magnetic flux density and low loss manganese-zinc ferrite material and its preparing method
  • High saturated magnetic flux density and low loss manganese-zinc ferrite material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1) Raw material mixing:

[0059] Select 54mol% Fe 2 o 3 , 33mol% MnO and 13mol% ZnO as raw materials, put them into a ball mill, add deionized water of equal weight, and ball mill for 2 hours. 2 The content is controlled at about 25ppm.

[0060] 2) Pre-burning:

[0061] Dry the mixed and ground material, put it into the furnace for pre-burning, the pre-burning temperature is 950°C, and the pre-burning time is 3 hours.

[0062] 3) Addition of impurities:

[0063] Add auxiliary ingredients to the pre-fired powder, these auxiliary ingredients include:

[0064] make up

[0065] 4) Secondary ball milling:

[0066] Put the calcined material added with auxiliary components into a ball mill, add an equal weight of deionized water, and ball mill for 3 hours, so that the average particle size of the calcined material is 1.2 μm.

[0067] 5) Molding:

[0068] Dry the slurry, add 10wt% polyvinyl alcohol (PVA), and press it into a ring shape with an outer diameter o...

Embodiment 2

[0078] 1) Raw material mixing:

[0079]Select 52mol% Fe 2 o 3 , 40mol% MnO and 8mol% ZnO as raw materials, put them into a ball mill, add deionized water of equal weight, and ball mill for 5 hours. 2 The content is controlled at about 30ppm.

[0080] 2) Pre-burning:

[0081] Dry the mixed and ground material, put it into the furnace for pre-burning, the pre-burning temperature is 800°C, and the pre-burning time is 3 hours.

[0082] 3) Addition of impurities:

[0083] Add auxiliary ingredients to the pre-fired powder, these auxiliary ingredients include:

[0084] make up

[0085] 4) Secondary ball milling:

[0086] Put the calcined material with added auxiliary components into a ball mill, add an equal weight of deionized water, and ball mill for 6 hours, so that the average particle size of the calcined material is 1.0 μm.

[0087] 5) Molding:

[0088] Dry the slurry, add 10wt% polyvinyl alcohol (PVA), and press it into a ring shape with an outer diameter of ...

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
Login to view more

Abstract

The present invention discloses high saturated magnetic flux density and low loss manganese manganese-zinc ferrite material and its preparation process. The manganese-zinc ferrite material contains: Fe2O3 52-54 mol%, MnO 33-40 mol%, ZnO 8-13 mol%, supplementary components CaCO3 100-600 ppm, SiO2 50-300 ppm and other metal oxides. The preparation process includes the steps of: mixing material, pre-sintering, adding supplementary components, secondary ball milling, forming and sintering. The supplementary components are common oxide grains, and this result in easy adding and low cost. The preparation process of the manganese-zinc ferrite material has relatively low pre-sintering and sintering temperature and relaxed requirement on sintering apparatus, may be completed in common vacuum sintering furnace, and easily realized in industrial production.

Description

technical field [0001] The invention relates to a manganese-zinc ferrite material with high saturation magnetic flux density and low loss and a preparation method thereof. Background technique [0002] Manganese-zinc ferrite materials are currently widely used in electronic equipment components such as communications, electronic computers, televisions and various digital products, and are the largest type of soft ferrite materials in mass production. Among them, power manganese-zinc ferrite is the largest classification of manganese-zinc ferrite, and its main application is to prepare the main transformer of various high-frequency switching power supplies. The main development trend of switching power supply is miniaturization and low loss, which requires that the MnZn ferrite used as the core of the main transformer should have higher saturation flux density and lower power consumption. [0003] In recent years, digital cameras, digital video cameras and mobile communicati...

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): C04B35/26C04B35/38C04B35/622H01F1/10
Inventor 严密罗伟
Owner ZHEJIANG UNIV
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