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Wide-temperature range and high-efficiency soft ferrite material, magnetic core preparation method and application

A soft ferrite, high-efficiency technology, applied in the fields of inorganic material magnetism, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of difficult function realization, rare systematic research and development, etc., and achieve excellent inductance Effects of stability, reduction in production costs, and reduction in overall wastage levels

Active Publication Date: 2018-09-21
湖北华磁电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made in the research, development and application of one-button start and automatic door systems at home and abroad, there are still great difficulties in realizing the functions under extreme temperature conditions. For the core functions of one-button start and automatic door systems Components - systematic research and development of soft ferrite materials and magnetic cores are rare

Method used

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  • Wide-temperature range and high-efficiency soft ferrite material, magnetic core preparation method and application
  • Wide-temperature range and high-efficiency soft ferrite material, magnetic core preparation method and application
  • Wide-temperature range and high-efficiency soft ferrite material, magnetic core preparation method and application

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Effect test

Embodiment 1

[0035] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0036] The ratio of each main component is respectively:

[0037] Fe 2 o 3 70mol%

[0038] MnO 22mol%

[0039] ZnO 8mol%

[0040] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0041]

[0042]

[0043] Nano-SiO with a particle size range of 50-100nm 2 100PPM.

[0044] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0045] First, each main component and each additive component are weighed and mixed uniformly.

[0046] Next, add pure water, dispersant, binder and defoamer to the mixed material, and perform ball milling to control the particle size distribution to 100-300 μm, and the weight percentage of water is 0.15%.

[0047] Then, add 7wt% PVA solution to the powder obtained by ball milling, and adopt spray drying to granulate. ...

Embodiment 2

[0055] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0056] The ratio of each main component is respectively:

[0057] Fe 2 o 3 71mol%

[0058] MnO 21mol%

[0059] ZnO 8mol%

[0060] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0061]

[0062] Nano-SiO with a particle size range of 50-100nm 2 200PPM.

[0063] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0064] First, each main component and each additive component are weighed and mixed uniformly.

[0065] Next, add pure water, dispersant, binder and defoamer to the mixed material, and perform ball milling to control the particle size distribution to 100-300 μm, and the weight percentage of water content is 0.2%.

[0066] Then, add 8wt% PVA solution to the powder obtained by ball milling, and adopt spray drying to granulate.

[006...

Embodiment 3

[0074] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0075] The ratio of each main component is respectively:

[0076] Fe 2 o 3 72mol%

[0077] MnO 21mol%

[0078] ZnO 7mol%

[0079] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0080]

[0081] Nano-SiO with a particle size range of 50-100nm 2 500PPM.

[0082] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0083] First, each main component and each additive component are weighed and mixed uniformly.

[0084] Next, add pure water, dispersant, binder and defoamer to the mixed material, and perform ball milling to control the particle size distribution to 100-300 μm, and the weight percentage of water is 0.25%.

[0085] Then, add 10wt% PVA solution to the powder obtained by ball milling, and adopt spray drying to granulate.

[0086] N...

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Abstract

The invention provides a wide-temperature range and high-efficiency soft ferrite material, a magnetic core preparation method and the application. Through optimized selection of a main formula and effective doping, the wide-temperature range and high-efficiency soft ferrite material is developed; by a multi-stage equilibrium atmosphere sintering method, the density, the crystal grain size and theporosity of the ferrite material and distribution of the ferrite material inside and between crystal grains are controlled, so that the microstructure of the ferrite material is more effectively controlled, and main characteristic parameters of the material are guaranteed to be harmonious and unified; ui of a final product can reach 3400, the core loss at 25-120 DEG C is 350mW, the core loss at 100 DEG C is 250mW, the L value stably reaches +3.5% in the temperature range of -40 DEG C to 85 DEG C, and the overall loss level is reduced by 8-13.8% in a relatively wide temperature range; the hightemperature Bs of the final product is also greatly improved, the final product has excellent inductance stability under a wide-temperature range condition, and the production cost is reduced by 20% or above.

Description

technical field [0001] The invention relates to a soft magnetic ferrite material, in particular to a soft magnetic ferrite material with wide temperature and high efficiency, a magnetic core preparation method and application. Background technique [0002] The soft magnetic ferrite material has been developed for more than 80 years since it was successfully developed by Philips Laboratory in the Netherlands in 1935. Since the magnetism of ferrite comes from ferrimagnetism, its saturation magnetization Ms is lower than that of metal magnetism, but higher than that of metal magnetism. The resistivity ρ is much higher, so it has good high frequency characteristics. In the field of weak current and high frequency technology, soft ferrite has unique advantages. Magnetic cores made of such materials are the core components of various inductors, electronic transformers, choke coils, suppressors, filters, etc. As the basic material of electronic information technology, soft magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/36H01F41/02
CPCC04B35/2658C04B35/622C04B2235/3208C04B2235/3232C04B2235/3251C04B2235/3277C04B2235/3293C04B2235/77H01F1/36H01F41/0246H01F41/0266
Inventor 郭皓黄刚李崇华
Owner 湖北华磁电子科技有限公司
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