Ultrahigh-Bs (saturation magnetic flux density) low-loss MnZn powder ferrite material and making method thereof

A technology of ferrite material and manufacturing method, which is applied in the field of MnZn soft magnetic ferrite material and manufacturing, can solve the problems of high power loss, high manufacturing cost, and no advantages, and achieve accurate composition of fired products, low cost, and increased Effect of Zn Vapor Pressure

Active Publication Date: 2014-03-26
江门安磁电子有限公司
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese patent with the publication number CN100334035C discloses a high Bs manganese zinc ferrite material and its manufacturing method. 2 o 3 , MnO, ZnO other than introducing NiO: 0.5~3mol% and / or LiO 0.5 : 0.5 ~ 3mol% as the main component, while adding SiO 2 , CaCO 3 , Nb 2 o 5 , ZrO 2 、 Ta 2 o 5 、In 2 o 5 , Ga 2 o 5 , SnO 2 、TiO 2 、MoO 3 , V 2 o 5 、GeO 2 、Bi 2 o 3 , Sb 2 o 3 And many impurities such as P compounds, to achieve the effect of ultra-high Bs and lower loss, but the process is cumbersome and the manufacturing cost is high
Although the Chinese patent application with publication number CN102690106A does not require the introduction of NiO or LiO 0.5 As the main component, after adding SiO 2 , CaCO 3 , Nb 2 o 5 , ZrO 2 , V 2 o 5 Higher Bs can also be achieved in the case of a small amount of impurities, but the power loss is too high, and the volume loss at 100°C reaches 1600kW / m 3 , there is no advantage in practical application
Chinese patent applications with publication numbers CN103172358A and CN103214233A all introduce 4.0-6.0mol% NiO and / or 1.0-3.0mol% Li 2 O to achieve the purpose of reducing power loss, Ni is a noble metal, and the manufacturing cost is high

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
  • Ultrahigh-Bs (saturation magnetic flux density) low-loss MnZn powder ferrite material and making method thereof
  • Ultrahigh-Bs (saturation magnetic flux density) low-loss MnZn powder ferrite material and making method thereof
  • Ultrahigh-Bs (saturation magnetic flux density) low-loss MnZn powder ferrite material and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1-10

[0037] 1) Using commercially available Fe 2 o 3 (purity ≥ 99.3%), Mn 3 o 4 (Mn content ≥ 71%), ZnO (purity ≥ 99.7%) as the main components, according to the amount shown in Table 1 Fe 2 o 3 , Mn 3 o 4 , ZnO is placed in a sand mill, stirred and ground to mix evenly; after drying, the temperature is raised to 900°C at a speed of 250°C / h and pre-fired for 2 hours;

[0038] 2) Based on the total weight of the pre-burned powder, add additives: Fe 2 o 3 (the amount added is listed in Table 1), 60ppm of SiO 2 , 500ppm of CaCO 3 and deionized water, dispersant, and defoamer for secondary grinding, until the particle size of the powder is D50=0.90μm, D90<2.5μm;

[0039] 3) Based on the total weight of the powder after ball milling, add 9.5wt% polyvinyl alcohol solution to the powder, mix and granulate evenly, and use a 45-ton dry powder press to press the granules into a green compact with a density of 3.0±0.2 g / cm 3 green samples of

[0040] 4) Finally, sinter at a sinte...

example 11～16

[0052] 1) Fe 2 o 3 76.6wt%, Mn 3 o 4 Fe 2 o 3 (purity ≥ 99.3%), Mn 3 o 4 (Mn content ≥ 71%), ZnO (purity ≥ 99.7%) raw materials are placed in a sand mill, stirred and ground to mix and dry evenly, then heat up to 800 ℃ at a speed of 280 ℃ / h and pre-fire for 3 hours;

[0053] 2) Based on the total weight of the powder after pre-burning, add 10wt% Fe 2 o 3 , and add auxiliary ingredients according to the addition amount shown in Table 2, then add deionized water, dispersant, and defoamer to carry out the second grinding, and grind until the particle size of the powder is D50=0.87μm, D90<2.3μm;

[0054] 3) Based on the total weight of the powder after ball milling, add 8.5wt% polyvinyl alcohol solution to the powder, mix and granulate evenly, and use a 45-ton dry powder press to press the granules into a green compact with a density of 3.0±0.2 g / cm 3 green samples of

[0055] 4) Finally, sinter at a sintering temperature of 1370°C, keep the temperature at the sinteri...

example 17～18

[0064] The raw material composition, powder preparation and molding process are the same as in Example 11, the difference lies in whether ZnO compact is placed in the kiln cavity or not.

[0065] Use HP4294A impedance analyzer (Agilent Technology4294A) and special fixture (Agilent Technology16047E) to measure the normal temperature inductance L of the sample magnetic ring under 10kHz weak field, and calculate the initial permeability of the material; use SY-8258 B-H tester at 50Hz, 1200A / m test the Bs of the sample magnetic ring at 25°C and 100°C; use the Model2335Watt Meter to test the power loss of the sample magnetic ring at 100kHz, 200mT, and 100°C, and the results are listed in Table 3.

[0066] table 3

[0067]

[0068] For MnZn ferrite materials, in order to obtain high saturation magnetic flux density, it is very effective to increase the content of Fe2O3 in the main component, but on the other hand, because Fe 2 o 3The content of Bs is too high, and it is easy to...

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
densityaaaaaaaaaa
Login to view more

Abstract

The invention provides an ultrahigh-Bs (saturation magnetic flux density) low-loss MnZn powder ferrite material and a making method thereof, the material has an ultrahigh Bs and low power loss, and the material is prepared from as raw materials comprising 75wt%-79wt% of Fe2O3, 10wt% -14wt% of Mn3O4 and 10wt%-14wt% of ZnO by blending, first grinding, presintering, second grinding, pelletizing, molding, sintering and other processes. The innovation of the material is to eliminate the technical prejudice, and by adding of the quantitative component Fe2O3 in the second grinding, the power loss is significantly reduced, and at the same time, the ultrahigh Bs and the low loss are realized.

Description

technical field [0001] The invention relates to a MnZn soft magnetic ferrite material and its manufacturing method, in particular to an ultra-high Bs low-loss MnZn power ferrite material and its manufacturing method, which belongs to the new material high technology of the metal functional material manufacturing technology for electronic components field. Background technique [0002] Soft magnetic ferrite is a kind of magnetic material with the most varieties, the most widely used and the largest consumption, and it is an important basic functional material in the electronic information industry. In the production and use of soft magnetic ferrite, MnZn ferrite is dominant, and the output of MnZn ferrite accounts for about 70% of the total output of soft ferrite. It is currently the most concerned and active soft magnetic material. field. In recent years, the development of MnZn ferrite materials has shifted from the in-depth improvement of a single performance to the hori...

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): C04B35/26C04B35/622
Inventor 黄爱萍谭福清豆小明汪南东
Owner 江门安磁电子有限公司
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