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High-frequency manganese-zinc ferrite material as well as preparation method and application thereof

A technology of manganese zinc ferrite and ferrite, which is applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of inability to realize device miniaturization, high power density, and high power consumption, and achieve improved sintering kinetics process, promoting uniformity, and narrowing the effect of high-frequency resonance bandwidth

Pending Publication Date: 2021-02-09
NANJING NEW CONDA MAGNETIC INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, a series of high-frequency and low-power ferrite materials at home and abroad, represented by Hitachi's ML91S and ML95S materials, have been widely used. The power consumption is still high. If the magnetic flux density of the application cannot be effectively increased, the requirements for device miniaturization and high power density cannot be achieved.

Method used

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  • High-frequency manganese-zinc ferrite material as well as preparation method and application thereof
  • High-frequency manganese-zinc ferrite material as well as preparation method and application thereof
  • High-frequency manganese-zinc ferrite material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0039] Utilize the method provided by the present invention to prepare high-frequency ultra-low loss MnZn power ferrite ring core, the preparation steps are as follows:

[0040] Step 1: Using high-purity Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to Dosing of the component raw materials is carried out with x=0.74, y=0.10, δ=0.16. First to Fe 2 o 3 , MnCO 3 Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.8 μm, and then a uniformly mixed powder is obtained after 2.5 hours of ball milling. Furthermore, the mixed powder was pre-fired in an air furnace, the pre-fired temperature was 900°C, and the synthesis time was 2 hours. The pre-fired product was determined to be a single-phase spinel structure MnZn ferrite by XRD;

[0041] Step 2: Grind the pre-calcined material in an ethanol medium and perform secondary wet ball milling, and sort the secondary ball milled powder particles through a fluid cyclone to o...

Embodiment 2

[0051] Utilize the method provided by the present invention to prepare high-frequency ultra-low loss MnZn power ferrite ring core, the preparation steps are as follows:

[0052] Step 1: Using high-purity Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to Dosing of the component raw materials is carried out with x=0.70, y=0.20, δ=0.10. First to Fe 2 o 3 , MnCO 3 Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.6 μm, and then a uniformly mixed powder is obtained through a 3-hour ball milling process. Furthermore, the mixed powder was pre-fired in an air furnace, the pre-fired temperature was 800°C, and the synthesis time was 5 hours. The pre-fired product was determined to be single-phase spinel structure MnZn ferrite by XRD;

[0053] Step 2: Grind the pre-calcined material in an ethanol medium and perform secondary wet ball milling, and sort the secondary ball milled powder particles through a fluid cyclone ...

Embodiment 3

[0063] Utilize the method provided by the present invention to prepare high-frequency ultra-low loss MnZn power ferrite ring core, the preparation steps are as follows:

[0064] Step 1: Using high-purity Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to Dosing of the component raw materials is carried out with x=0.78, y=0.10, δ=0.12. First to Fe 2 o 3 , MnCO 3 Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.8 μm, and then a uniformly mixed powder is obtained after 2.5 hours of ball milling. Furthermore, the mixed powder was pre-fired in an air furnace, the pre-fired temperature was 900°C, and the synthesis time was 2 hours. The pre-fired product was determined to be a single-phase spinel structure MnZn ferrite by XRD;

[0065] Step 2: Grind the pre-calcined material in an ethanol medium and perform secondary wet ball milling, and sort the secondary ball milled powder particles through a fluid cyclone to o...

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Abstract

The invention discloses a high-frequency manganese-zinc ferrite material as well as a preparation method and application thereof, belonging to the field of magnetic materials. The material comprises amain crystalline phase and a doped crystalline phase. The main crystal phase is MnZn ferrite with a single-phase spinel structure; and the doped crystal phase is prepared from CaO, SiO2, Nb2O5, ZrO2,Co2O3 and Li2O. According to the method, the ferrite powder with the single-phase spinel structure is synthesized through pre-sintering in N2, and fine regulation and control on the ferrite grain size and the dispersity of ferrite grains can be realized through cyclone separation based on grain sizes, so reduction of a ferrite magnetization high-frequency resonance bandwidth is facilitated; by using nano-oxide particles, the uniformity of intragranular doping and grain boundary doping of the ferrite material is promoted, the sintering dynamic process of the ferrite material can be effectivelyimproved, and the fine regulation and control of the ferrite microstructure and the improvement of the magnetic properties of the ferrite microstructure are realized.

Description

technical field [0001] The invention belongs to the field of magnetic materials, in particular to a high-frequency manganese-zinc ferrite material, its preparation method and application. Background technique [0002] Manganese zinc ferrite material is MnZn ferrite is a kind of soft magnetic material widely used in modern communication, computer, radio and television, automotive electronics and national defense technology and other fields. In recent years, as microelectronics technology continues to put forward miniaturization and integration requirements for magnetic functional devices and the development of a new generation of semiconductor devices gallium nitride, it is widely used in new energy vehicle on-board chargers, charging stations / piles, mobile communication base stations, etc. In electronic equipment, transformers, inductors, choke coils and other magnetic components and other applications, the operating frequency of magnetic components continues to increase. T...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622H01F1/34
CPCC04B35/2658C04B35/622H01F1/344C04B2235/3284C04B2235/442
Inventor 王修炜李庆陈小林赵光
Owner NANJING NEW CONDA MAGNETIC INDAL
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