Ultra-low-loss wide-temperature-power MnZn ferrite, preparation method and application thereof in 5G communication field

A technology of ferrite and ferrite powder, which is applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problems of large power loss increase, reduce the minimum loss density, and reduce high-frequency resonance The effect of bandwidth

Active Publication Date: 2021-01-08
马鞍山新康达磁业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past ten years, a series of wide-temperature and low-power ferrite materials at home and abroad, represented by TDK's PC95 material, have been widely used, but the minimum loss temperature point of this type of material is often at 80°C, and the minimum loss density Only 300kW / m can be achieved 3
[0003] However, the power loss of most soft ferrites has a positive temperature coefficient with the loss temperature, and the power loss increases greatly

Method used

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  • Ultra-low-loss wide-temperature-power MnZn ferrite, preparation method and application thereof in 5G communication field
  • Ultra-low-loss wide-temperature-power MnZn ferrite, preparation method and application thereof in 5G communication field
  • Ultra-low-loss wide-temperature-power MnZn ferrite, preparation method and application thereof in 5G communication field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 11

[0041]The method provided by the present invention is used to prepare a high frequency ultra-low loss MnZn power ferrite toroidal magnetic core, and the preparation steps are as follows:

[0042]Step 1: Use high purity Fe2O3, MnCO3And ZnO as raw materials, according toCarry out the metering and batching of component raw materials, where x=0.74, y=0.10, δ=0.15.2O3, MnCO3Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.8μm, and then a uniformly mixed powder is obtained through a 2.5-hour ball milling process. Furthermore, the mixed powder is calcined in an air furnace, the calcining temperature is 950°C, the synthesis time is 2 hours, and the calcined product is determined to be a single-phase spinel structure MnZn ferrite by XRD;

[0043]Step 2: The pre-fired synthetic material is crushed and wet ball milled twice in ethanol, and the particles of the second ball mill are sorted by a fluid cyclone to obtain an average particle size of...

Embodiment 12～ Embodiment 19

[0050]Based on the process of Example 11, changing Fe2O3Then, perform performance tests on the permeability spectrum and power loss density (100kHz / 200mT) of the obtained MnZn ferrite toroidal core. The performance parameters are shown in Table 1.

[0051]Table 1:

[0052]

[0053]Based on Example 11 to Example 19, it can be seen from the experimental data in Table 1: that the single-phase spinel structure of MnZn ferrite has Fe2O3With the increase of the content, the lowest loss point of the obtained MnZn ferrite moves to low temperature. However, as Fe2O3An increase in the amount of addition will lead to an increase in loss, so that the loss of Mn-Zn ferrite will increase; when the Fe2O3When the content is 0.79 to 0.81, the effect of the obtained single-phase spinel structure MnZn ferrite is the best.

Embodiment 21～ Embodiment 23

[0055]On the basis of Example 11, when preparing single-phase spinel structure MnZn ferrite, CeO2Particles. Specifically: with high purity Fe2O3, MnCO3, ZnO and CeO2As raw materials, in accordance withCarry out the metering and batching of component raw materials, where x=0.80, y=0.15, z=0.008, δ=0.10. First of Fe2O3, MnCO3Raw materials such as ZnO and ZnO are firstly ground separately until the average particle size reaches 0.8μm, and then a uniformly mixed powder is obtained through a 2.5-hour ball milling process. Furthermore, the mixed powder was calcined in an air furnace, the calcining temperature was 950°C, and the synthesis time was 2 hours. The calcined product was determined to be a single-phase spinel structure MnZn ferrite by XRD.

[0056]Other processes and parameters are the same as in Example 11. Then the magnetic permeability spectrum and power loss density (100kHz / 200mT) of the obtained MnZn ferrite toroidal core were tested. The performance parameters are shown in Tab...

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Abstract

The invention discloses ultra-low-loss wide-temperature-power MnZn ferrite, a preparation method and application thereof in the field of 5G communication, and belongs to the field of 5G communication.The ultra-low-loss wide-temperature-power MnZn ferrite comprises a main crystalline phase and a doped crystalline phase, wherein the main crystalline phase is MnZn ferrite with a single-phase spinelstructure; the MnZn ferrite comprises the following chemical components: [Mn<x>Zn<y>Ce <4+>Fe<delta><2+>]Fe<2><3+>O<4>, wherein 0.75<x<0.83, 0.10<y<0.20, 0.005 , the content of ferrous ions is increased, so that the lowest loss point of the MnZn ferrite moves to a low temperature more smoothly, and the relationship between the lowest loss point and the lowest loss density can be optimized by controlling the content of CeO2.

Description

Technical field[0001]The invention belongs to the field of 5G communication, in particular to an ultra-low loss wide temperature power MnZn ferrite, a preparation method and its application in the field of 5G communication.Background technique[0002]Manganese-zinc ferrite material is MnZn ferrite is a soft magnetic material widely used in modern communications, computers, radio and television, automotive electronics, and defense technology. In recent years, with the rapid development of 5G communication, the efficiency of 5G communication power has become the goal pursued by various manufacturers, which requires the corresponding manganese-zinc ferrite material to have ultra-low loss at a specific temperature. In the past ten years, a series of wide-temperature low-power ferrite materials at home and abroad, represented by TDK's PC95 material, have been widely used, but the lowest loss temperature point of this type of material is often at 80 ℃, and the lowest loss density Can only a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/38C04B35/622C04B35/626H01F41/02H01F1/34
CPCC04B35/2633C04B35/622C04B35/62605C04B35/6261C04B35/62655H01F41/02H01F1/344C04B2235/3229C04B2235/3284C04B2235/442C04B2235/3208C04B2235/3418C04B2235/3251C04B2235/3275C04B2235/3244C04B2235/3203C04B2235/77
Inventor 王修炜李庆陈小林赵光
Owner 马鞍山新康达磁业股份有限公司
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