High-saturation-flux-density MnZn ferrite material and preparation method thereof

A technology of ferrite material and magnetic flux density, which is applied in the field of high saturation magnetic flux density MnZn ferrite material and its preparation, can solve the problems of high price and increased production cost of ferrite materials, and achieve energy saving, High saturation magnetic flux density and miniaturization effect

Inactive Publication Date: 2012-09-26
HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF11 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, NiO is a precious metal, the price is quite expensive, which increases the production cost of ferrite 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-saturation-flux-density MnZn ferrite material and preparation method thereof
  • High-saturation-flux-density MnZn ferrite material and preparation method thereof
  • High-saturation-flux-density MnZn ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh Fe with the main component content shown in Table 1 2 o 3 , MnO, and ZnO raw materials were wet-mixed, and then pre-fired at 900°C for 2 hours. Add 100ppm of SiO to the pre-fired mixture based on the weight of the main component 2 , 1000ppm of CaCO 3 , 200ppm ZrO 2 , 200ppm Nb 2 o 5 and 300ppm V 2 o 5 , wet sanding to obtain a ferrite slurry. Add 1wt% PVA binder calculated by ferrite powder weight to the slurry for spray granulation. at 1 ton / cm 2 Under high pressure, the granulated powder is molded into a standard ring ferrite core for testing. The molded body is sintered at 1330°C for 5 hours under the condition of controlled oxygen partial pressure, wherein the oxygen partial pressure concentration is 0.001% in the heating stage from 900°C to 1330°C, and then cooled to room temperature under the protection of nitrogen. The final composition of the ferrite core was detected to be consistent with the design composition by an X-ray fluorescence analyzer...

Embodiment 2

[0034] The preparation process of the magnetic core is the same as that of Example 1. Only Fe in the main ingredient formula 2 o 3 , MnO, ZnO content fixed at 65mol% Fe 2 o 3 , 20 mol% of MnO and 15 mol% of ZnO. The addition amount of auxiliary component is as shown in table 2.

[0035]

[0036] It can be seen from Table 2 that when the content of the secondary components is within the scope of the present invention, the volume power consumption of the magnetic core is low and the saturation magnetic flux density is high. When the content of the subcomponent deviates from the range of the present invention, the saturation magnetic flux density tends to decrease or the power consumption tends to increase.

Embodiment 3

[0038] The composition of the magnetic core is the same as that of test number 105#, and the preparation process is the same as that of Example 1. Only the oxygen partial pressure concentration in the temperature rising section from 900°C to 1330°C is shown in Table 3.

[0039]

[0040] It can be seen from Table 3 that when the oxygen partial pressure concentration is higher than 1%, the saturation magnetic flux density of the magnetic core is greatly reduced.

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
saturation flux densityaaaaaaaaaa
saturation flux densityaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the field of soft-magnetic MnZn ferrite materials, and particularly relates to a high-saturation-flux-density MnZn ferrite material which comprises major components and minor components, wherein on the basis of oxides, the major components comprise 60-68 mol% of Fe2O3, 10-20 mol% of ZnO and the balance of MnO; and on the basis of the total weight of the major components, the minor components comprise 50-200 ppm of SiO2, 200-1500 ppm CaCO3, 50-500 ppm of ZrO2, 50-500 ppm of Nb2O5 and 50-500 ppm of V2O5. The invention also provides a preparation method of the ferrite material. The invention overcomes the defect that the existing soft-magnetic ferrite material can not combine low loss and high saturation flux density; the saturation flux density of the provided ferrite core is higher than 560mT at 25 DEG C, and higher than 460mT at 100 DEG C; and the volume loss is less than 1800kW / m<3> at 25 DEG C, and less than 1600kW / m<3> at 100 DEG C.

Description

technical field [0001] The invention belongs to the field of soft magnetic MnZn ferrite materials, and in particular relates to a high saturation magnetic flux density MnZn ferrite material and a preparation method thereof. Background technique [0002] MnZn ferrite is widely used in the fields of electronics and communication as energy storage and conversion materials. The miniaturization, high speed and high output power of electronic devices require that MnZn ferrite devices can still work normally under high current. However, compared with soft magnetic metal materials, the main disadvantage of MnZn ferrite is its lower saturation magnetic flux density (Bs), which makes MnZn ferrite have poorer ability to withstand large currents than soft magnetic metal materials. [0003] In addition, actual ferrite cores often operate at high temperatures due to the heat generated by the magnetic components themselves and high operating temperature environments, such as electronic co...

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 颜冲吕东华雷国莉何俊王素平郭晓东
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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