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Preparation method of MnZn ferrite material with ultralow high-temperature power loss

A ferrite material, power loss technology, applied in the field of crushing and sintering process, can solve the problem of high power loss

Inactive Publication Date: 2019-06-04
TDG HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past ten years, a series of wide temperature and low power consumption ferrite materials at home and abroad have been widely used, such as TDK's PC95 series and Fly Magnetic's 3C97 series, etc., but for some special working conditions, this generation of materials is in the Higher temperature range (100~160°C) power loss is still high

Method used

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  • Preparation method of MnZn ferrite material with ultralow high-temperature power loss
  • Preparation method of MnZn ferrite material with ultralow high-temperature power loss
  • Preparation method of MnZn ferrite material with ultralow high-temperature power loss

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Embodiment 1

[0030] Utilize the method provided by the present invention to prepare ultra-low high temperature power loss MnZn ferrite ring magnetic core, the preparation steps are as follows:

[0031] (1) with high purity Fe 2 o 3 , MnCO 3 and ZnO as raw materials, according to Fe2O3 is 53.10mol%, ZnO is 9.40mol%, and MnO is the balance; according to the total weight of the main component, the content of each component of the additive auxiliary component is: CaCO 3 0.05%, Nb 2 o 5 0.03%, Co 2 o 3 0.4%, ZrO 2 0.02%, KHCO 3The metering of the component raw materials is carried out at 0.010%. 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 0.8-1.2 μm, and then a uniform mixed powder is obtained through a 0.5-hour ball milling process. Furthermore, the mixed powder was pressed into a block at 50 MPa, and pre-calcined in the air, the pre-calcination temperature was 850°C, and the synthesis time was 2...

Embodiment 2

[0043] Utilize the method provided by the present invention to prepare ultra-low high temperature power loss MnZn ferrite ring magnetic core, the preparation steps are as follows:

[0044] (1) with high purity Fe 2 o 3 , MnCO 3 and ZnO as raw material, according to Fe 2 o 3 is 53.10mol%, ZnO is 9.40mol%, and MnO is the balance; based on the total weight of the main component, the content of each component of the additive and auxiliary components is: CaCO 3 0.05%, Nb 2 o 5 0.03%, Co 2 o 3 0.4%, ZrO 2 0.02%, KHCO 3 The metering of the component raw materials takes place at 0%. 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 0.8-1.2 μm, and then a uniform mixed powder is obtained through a 0.5-hour ball milling process. Furthermore, the mixed powder was pressed into a block at 50 MPa, and pre-calcined in the air, the pre-calcination temperature was 850°C, and the synthesis time was 2....

Embodiment 3

[0056] Utilize the method provided by the present invention to prepare ultra-low high temperature power loss MnZn ferrite ring magnetic core, the preparation steps are as follows:

[0057] (1) with high purity Fe 2 o 3 , MnCO 3 and ZnO as raw material, according to Fe 2 o 3 is 53.30mol%, ZnO is 9.20mol%, and MnO is the balance; based on the total weight of the main component, the content of each component of the additive and auxiliary components is: CaCO 3 0.05%, Nb 2 o 5 0.03%, Co 2 o 3 0.4%, ZrO 2 0.02%, KHCO 3 The metering of the component raw materials is carried out at 0.010%. 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 0.8-1.2 μm, and then a uniform mixed powder is obtained through a 0.5-hour ball milling process. Furthermore, the mixed powder was pressed into a block at 50 MPa, and pre-calcined in the air, the pre-calcination temperature was 850°C, and the synthesis time...

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Abstract

The invention relates to a MnZn ferrite with ultralow high-temperature power loss and a preparation method thereof. The MnZn ferrite is composed of main components and auxiliary components. The main components comprise 52.9-53.4 mol% of Fe2O3, 9.0-9.8 mol% of ZnO and the balance MnO. Based on the total weight of the main components, the auxiliary components comprise the following additives: 0.03-0.05% of CaCO3, 0.02-0.03% of Nb2O5, 0.3-0.4% of Co2O3, 0.01-0.03% of ZrO2, and 0.0050-0.020% of KHCO3. Through secondary grinding and particle cyclone sorting of a pre-sintered material and through granulation, pressure forming and sintering under atmosphere / temperature control conditions, the MnZn ferrite with ultralow high-temperature power loss is prepared. The product has a dense microstructure and uniform grain size, has low power loss within the high temperature range of 100-160 DEG C, and has high saturation flux density and high magnetic conductivity.

Description

technical field [0001] The patented invention belongs to the field of advanced preparation and application of high-performance power ferrite soft magnetic materials, and relates to a preparation method of high-temperature (100°C~160°C) ultra-low loss MnZn power ferrite materials, and involves crushing and sintering processes. The ultra-low high-temperature power loss MnZn ferrite material is especially suitable for fields that require high working environment temperature, such as high-power-density modular switching power supplies in the military and automotive electronics industries, and has important application value for the miniaturization and high-density integration of devices , It is widely used in new energy vehicle on-board chargers, charging stations / piles, mobile communication base stations and other fields. Background technique [0002] MnZn ferrite is a kind of soft magnetic material widely used in modern communication, computer, radio and television, automotive...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 黄艳锋邢冰冰李小龙
Owner TDG HLDG CO LTD
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