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High-frequency manganese-zinc ferrite material

A manganese-zinc ferrite and high-frequency technology, which is applied in the field of manganese-zinc ferrite materials and their preparation, can solve the problems such as the inability to meet the design and matching requirements of high-frequency switching power supplies, and achieves a small change rate of power loss, stable performance, The effect of low power loss

Inactive Publication Date: 2016-06-08
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrite cores have become the key components for miniaturization and portability of switching power supplies, and ferrite materials with operating frequencies below 300kHz cannot meet the supporting requirements for high-frequency switching power supply design

Method used

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  • High-frequency manganese-zinc ferrite material
  • High-frequency manganese-zinc ferrite material

Examples

Experimental program
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Effect test

preparation example Construction

[0022] The preparation of the high-frequency manganese-zinc ferrite material of the present invention sequentially includes the steps of mixing, pre-calcination, pulverization, granulation, pressing and sintering.

[0023] Use industrial grade or the same grade of commercial iron oxide, manganese oxide, zinc oxide powder as raw material, the specific surface area of ​​raw material powder can be 3~30m 2 Appropriate selection within the range of / g. The main components are mixed evenly according to the required ratio, and then pre-sintered. The pre-sintering temperature can be between 800~1100℃, and the time is 0~4 hours. The crushed particle size of the calcined powder is controlled between 0.5 and 1.8 μm, and the particle size distribution is concentrated and has a good normal distribution. The pulverized slurry is granulated by a pressure spray drying tower, and the characteristics are adjusted according to the pressing requirements. The sintering is carried out in an atmo...

Embodiment 1

[0028] Iron oxide, manganese oxide, and zinc oxide powders were used as raw materials and weighed according to the composition shown in Table 1. The annular MnZn ferrite core was prepared according to the following preparation conditions.

[0029] The main components are mixed evenly according to the required ratio, and then pre-sintered. The pre-sintering temperature can be 1000°C for 3 hours. The weighed impurity, that is, the auxiliary component (CaCO 3 , V 2 o 5 , SnO 2 The contents are respectively 0.05wt%, 0.05wt%, 0.5wt% in terms of main components) mixed with the calcined powder evenly, and then put into a sand mill for crushing. The crushed particle size is controlled between 0.5 and 1.8 μm, and the particle size distribution is concentrated and has a good normal distribution. The pulverized slurry is granulated by a pressure spray drying tower, and the characteristics are adjusted according to the pressing requirements. The sintering is carried out in an atmosph...

Embodiment 2~6

[0033] As shown in Table 1, except Fe as the main component 2 o 3 The composition is in the range of 53mol%~62mol% and the composition of ZnO is changed in the range of 0.5mol%~10mol%, and the rest is manganese oxide. The remaining processes are carried out in the same manner as in Example 1, and the main components are uniformly mixed according to the required ratio, and then pre-sintered. The pre-sintering temperature can be 1000°C for 3 hours. The weighed impurity, that is, the auxiliary component (CaCO 3 , V 2 o 5 , SnO 2 The contents are respectively 0.05wt%, 0.05wt%, 0.5wt% in terms of main components) mixed with the calcined powder evenly, and then put into a sand mill for crushing. The crushed particle size is controlled between 0.5 and 1.8 μm, and the particle size distribution is concentrated and has a good normal distribution. The pulverized slurry is granulated by a pressure spray drying tower, and the characteristics are adjusted according to the pressing r...

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Abstract

The invention relates to a high-frequency manganese-zinc ferrite material. The main component of the material is composed of 53-62 mol% of Fe2O3, 0.5-10.0 mol% of ZnO and the balance of MnO. The accessory components I are composed of CaCO3, Nb2O5, SiO2, V2O5 and Li2CO3, and account for 0.02-0.15 wt% of the main component; the accessory components II are composed of ZrO2, Co2O3, TiO2 and SnO2, and account for 0.10-0.75 wt% of the main component; and the combination of the accessory components comprises at least one accessory component II. The high-frequency manganese-zinc ferrite material has low power loss and high working frequency range within the temperature range of 0-125 DEG C: the loss is 500kW / m<3> or below under the conditions of f<=5MHz and B<=30mT. The high-frequency manganese-zinc ferrite material has the advantages of small power loss change rate and stable performance, is used for manufacturing various inductors and transformers, and is applicable to the field of high frequency.

Description

technical field [0001] The invention belongs to the technical field of soft ferrite materials, and specifically relates to manganese-zinc ferrite which can be used to make transformer or inductor cores, is suitable for working in the range of 1MHz to 10MHz, has a wide working temperature range, high frequency and low loss Materials and their preparation methods. Background technique [0002] With the rapid development of electronic technology, the application fields of electronic systems are becoming more and more extensive, and there are more and more types of electronic equipment. The connection between electronic equipment and people's work and life is becoming increasingly close. Any electronic equipment is inseparable from a reliable power supply, and their requirements for power supply are getting higher and higher. [0003] The miniaturization and cost reduction of electronic equipment take light, thin, small and high efficiency as the development direction. The tra...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
CPCC04B35/2616C04B35/2633C04B35/622C04B2235/3203C04B2235/3208C04B2235/3232C04B2235/3239C04B2235/3244C04B2235/3251C04B2235/3275C04B2235/3293C04B2235/3418C04B2235/763C04B2235/96
Inventor 邢冰冰潘晓东张强原顾张新
Owner TDG HLDG CO LTD
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