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High-emperature highly saturated flux density MnZn ferrite material and method for producing magnetic core

A technology of ferrite materials and magnetic cores, applied in the field of soft ferrite materials, can solve the problems of high temperature of magnetic parts, high power consumption of magnetic cores, and reduced energy transmission efficiency, and achieve high saturation magnetic flux density performance and guarantee normal working effect

Inactive Publication Date: 2009-05-13
GUANGDONG FENGHUA ADVANCED TECH HLDG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The power consumption of the magnetic core itself is high, which will increase the heat of the magnetic part itself and reduce the energy transmission efficiency
In addition, the core power consumption valley point tends to be low temperature. Once the operating temperature is higher than the power consumption valley point, the higher the temperature, the greater the power consumption of the magnetic core, and the greater the power consumption, it will lead to a vicious cycle of higher magnetic parts temperature.

Method used

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  • High-emperature highly saturated flux density MnZn ferrite material and method for producing magnetic core

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Effect test

Embodiment 1

[0018] A method for preparing a magnetic core from a MnZn ferrite material includes the steps of primary batching and ball milling, pre-sintering, secondary batching and ball milling, spray granulation to obtain pellets, pressing into a green body, and green body sintering. The main ingredient is iron oxide Fe 2 O 3 50.2mol%, manganese oxide MnO47.9mol%, the balance is zinc oxide ZnO, of which Fe 2 O 3 Using German ThyssenKrupp iron red (purity ≥99.3wt%), MnO is converted into Mn 3 O 4 , Using high-purity Mn from Hunan Jinrui 3 O 4 (Purity≥98.8wt%), ZnO from Haimen, Zhejiang (purity≥99.7wt%) is used for ZnO. Pour the three raw materials into a mixing tank, add dispersant and deionized water, stir and mix thoroughly, and perform ball milling for 3-6 hours. Spray drying and calcination are performed, the calcination temperature is 760-950°C, the calcination time is 40-90 minutes, and the calcination material is obtained. In the main crystalline phase, 100-800 ppm by weight of the fi...

Embodiment 2

[0020]A method for preparing a magnetic core from a MnZn ferrite material includes the steps of primary batching and ball milling, pre-sintering, secondary batching and ball milling, spray granulation to obtain pellets, pressing into a green body, and green body sintering. In the main ingredient, iron oxide Fe is added 2 O 3 55.3mol%, manganese oxide MnO 38.4%, the balance is zinc oxide ZnO, of which Fe 2 O 3 Using German ThyssenKrupp iron red (purity ≥99.3wt%), MnO is converted into Mn 3 O 4 , Using high-purity Mn from Hunan Jinrui 3 O 4 (Purity≥98.8wt%), ZnO from Haimen, Zhejiang (purity≥99.7wt%) is used for ZnO. Pour the three raw materials into a stirring tank, add dispersant and deionized water, stir and mix thoroughly, and perform ball milling for 3-6 hours. Spray drying and calcination are performed, the calcination temperature is 760-950°C, the calcination time is 40-90 minutes, and the calcination material is obtained. In the main crystalline phase, 100-800 ppm by weight ...

Embodiment 3

[0022] A method for preparing a magnetic core from a MnZn ferrite material includes the steps of primary batching and ball milling, pre-sintering, secondary batching and ball milling, spray granulation to obtain pellets, pressing into a green body, and green body sintering. In the ingredients, the main ingredient is iron oxide Fe 2 O 3 52.7mol%, manganese oxide MnO 43.5mol%, the balance is zinc oxide ZnO, of which Fe 2 O 3 Using German ThyssenKrupp iron red (purity ≥99.3wt%), MnO is converted into Mn 3 O 4 , Using high-purity Mn from Hunan Jinrui 3 O 4 (Purity≥98.8wt%), ZnO from Haimen, Zhejiang (purity≥99.7wt%) is used for ZnO. Pour the three raw materials into a stirring tank, add dispersant and deionized water, stir and mix thoroughly, and perform ball milling for 3-6 hours. Spray drying and calcination are performed, the calcination temperature is 760-950°C, the calcination time is 40-90 minutes, and the calcination material is obtained. In the main crystalline phase, 100-800 ...

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Abstract

The invention relates to a MnZn ferrite material and a method for preparing a magnetic core. Based on molar ratio, the main compositions comprise 50.2 to 55.3 mol percent of iron oxide Fe2O3, 38.4 to 47.9 mol percent of manganese oxide MnO, and the balance being zinc oxide ZnO; besides, in terms of weight, 100 to 800 ppm of a first accessory composition and 100 to 4,000 ppm of a second accessory composition are added to the main compositions, wherein the first accessory composition refers to on or two of TiO2, ZrO2 and SiO2, and the second accessory composition refers to one or more of CaCO3, NiO, Nb2O5, and Co2O3. The magnetic core prepared from the materials has the characteristics of quite high saturation magnetic flux density and low power loss as the temperature rises continuously.

Description

Technical field [0001] The invention belongs to the technical field of soft magnetic ferrite materials, and specifically relates to a wide temperature, high saturation magnetic flux density and low power loss MnZn ferrite material and a method for preparing a magnetic core. Background technique [0002] MnZn high temperature and high Bs material is a new high-performance soft ferrite material, which is mainly used in automotive electronics, integrated circuit module output filters and other high-temperature and high-current occasions. It can be used normally under the harsh conditions that ordinary power ferrite is difficult to handle. The material must have excellent electromagnetic properties, that is, the material must have a high Curie temperature to ensure that it can still maintain the material's substandard under high temperature conditions. Ferromagnetic. The Curie temperature of ordinary power ferrite is generally between 200~230℃; the material must have excellent anti-s...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622
Inventor 王京平胡春元王宏蒋胜勇叶绍均胡卫斌姚木有贺娟胡永清赖永学周锋王治群陶超
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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