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Preparation method of high-permeability ferrite magnetic material

A magnetic material and high magnetic permeability technology, applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve the problems of large eddy current loss and inconspicuous advantages, achieve low porosity and improve mobility , the effect of increasing the space

Active Publication Date: 2022-02-11
江西伟普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional manganese zinc ferrite has a low resistivity, its eddy current loss is relatively large in a high frequency environment, and the advantage is not obvious

Method used

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  • Preparation method of high-permeability ferrite magnetic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of high magnetic permeability ferrite magnetic material, comprising the following specific steps:

[0034] S1. Raw material preparation: prepare each raw material composition according to mass percentage: Fe 2 o 3 53%, MnO 26%, ZnO 120%, polyimide resin powder 0.3%, MoO 3 0.6%, other dopants 0.1%; said other dopants are SO 3 , γ-Bi 2 o 3 Mixed powder with CaO, its mass ratio is 3:1:4;

[0035] S2. Pretreatment: Fe 2 o 3 , MnO, and ZnO are placed in a high-temperature electric furnace, and heat-treated in a nitrogen environment. The heat treatment method is to raise the temperature to 550°C at a rate of 4°C / min, keep it warm for 2 hours, and then naturally cool down to room temperature;

[0036] S3. Primary grinding: the pretreated Fe in S2 2 o 3 , MnO, and ZnO were mixed and added to the grinder, and then other dopants were added, and ground for 2 hours at a grinding speed of 500r / min to obtain a primary grinding product;

[0037]S4. Pri...

Embodiment 2

[0043] A preparation method of high magnetic permeability ferrite magnetic material, comprising the following specific steps:

[0044] S1. Raw material preparation: prepare each raw material composition according to mass percentage: Fe 2 o 3 54%, MnO 25%, ZnO 19%, polyimide resin powder 0.4%, MoO 3 0.4%, other dopants 0.2%; said other dopants are SO 3 , γ-Bi 2 o 3 The mixed powder with CaO, its mass ratio is 5:2:3;

[0045] S2. Pretreatment: Fe 2 o 3 , MnO, and ZnO are placed in a high-temperature electric furnace, and heat-treated in a nitrogen environment. The heat treatment method is to raise the temperature to 600°C at a rate of 5°C / min, keep it warm for 2 hours, and then naturally cool down to room temperature;

[0046] S3. Primary grinding: the pretreated Fe in S2 2 o 3 , MnO, and ZnO were mixed and added to the grinding machine, and then other dopants were added, and the grinding was performed for 3 hours at a grinding speed of 400r / min to obtain a grinding p...

Embodiment 3

[0053] A preparation method of high magnetic permeability ferrite magnetic material, comprising the following specific steps:

[0054] S1. Raw material preparation: prepare each raw material composition according to mass percentage: Fe 2 o 3 56%, MnO 24%, ZnO 19%, polyimide resin powder 0.5%, MoO 3 0.2%, other dopants 0.3%; said other dopants are SO 3 , γ-Bi 2 o 3 The mixed powder with CaO, its mass ratio is 9:3:4;

[0055] S2. Pretreatment: Fe 2 o 3 , MnO, and ZnO are placed in a high-temperature electric furnace, and heat-treated in a nitrogen environment. The heat treatment method is to raise the temperature to 650°C at a rate of 6°C / min, keep it warm for 1.5h, and then naturally cool down to room temperature;

[0056] S3. Primary grinding: the pretreated Fe in S2 2 o 3 , MnO, and ZnO were mixed and added to the grinder, and then other dopants were added, and ground for 4 hours at a grinding speed of 250r / min to obtain a primary grinding product;

[0057] S4. Pr...

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Abstract

The invention belongs to the technical field of ferrite magnetic materials, and particularly relates to a preparation method of a high-permeability ferrite magnetic material, the preparation method comprises the following steps: preparing materials, pretreating, grinding for the first time, sintering for the first time, grinding for the second time, sintering for the second time, granulating, forming, sintering for the third time, and annealing to obtain the ferrite magnetic material. According to the preparation method, redundant impurities are removed through heat treatment of the raw materials, the magnetic conductivity is improved, and then auxiliary materials capable of improving the magnetic conductivity are doped to further improve the magnetic conductivity; by doping a small amount of high-resistance resin and combining multiple times of grinding and sintering, the obtained ferrite magnetic material has the characteristics of high magnetic conductivity and low loss.

Description

technical field [0001] The invention belongs to the technical field of ferrite magnetic materials, and in particular relates to a preparation method of high magnetic permeability ferrite magnetic materials. Background technique [0002] Ferrite is a metal oxide with ferrimagnetism. The resistivity of ferrite is much larger than that of single metal or alloy magnetic materials, and it has higher dielectric properties and magnetic permeability. Therefore, ferrite has become a widely used non-metallic magnetic material in the field of high frequency and weak current. Due to the low magnetic energy stored in the unit volume of ferrite, the saturation magnetic induction (Bs) is also low, which limits its application in low-frequency strong current and high-power fields that require high magnetic energy density. [0003] With the rapid development of electronic technology, the application fields of electronic systems are becoming more and more extensive, and there are more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/622C04B35/626H01F1/01H01F41/02
CPCC04B35/2633C04B35/2658C04B35/622C04B35/6261C04B35/62605C04B35/62645H01F1/01H01F41/02C04B2235/3262C04B2235/3284C04B2235/3208C04B2235/3298C04B2235/34C04B2235/658C04B2235/6581C04B2235/662
Inventor 邵萌段晓峰
Owner 江西伟普科技有限公司
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