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Soft magnetic ferrite material with high Bs value and low power loss and preparation method of magnetic core of soft magnetic ferrite material

A soft ferrite, low-power technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of high loss, high dependence on sintering process, Bs value can not reach the ideal state, etc., to achieve production costs The effect of reducing, high product quality and high Bs value

Active Publication Date: 2018-10-12
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

[0004] Compared with the research and development level of high Bs materials of domestic manufacturers, the research and development results of many manufacturers either fail to achieve the ideal Bs value, or the loss is high, or they are highly dependent on the sintering process

Method used

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  • Soft magnetic ferrite material with high Bs value and low power loss and preparation method of magnetic core of soft magnetic ferrite material
  • Soft magnetic ferrite material with high Bs value and low power loss and preparation method of magnetic core of soft magnetic ferrite material
  • Soft magnetic ferrite material with high Bs value and low power loss and preparation method of magnetic core of soft magnetic ferrite material

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Experimental program
Comparison scheme
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 68mol

[0038] MnO 17mol

[0039] ZnO 15mol

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

[0041]

[0042] Nano-SiO with a particle size range of 50-100nm 2 50PPM.

[0043] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0044] First, each main component and each additive component are weighed and mixed uniformly.

[0045] 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%.

[0046] Then, add 7wt% PVA solution to the powder obtained by ball milling, and adopt spray drying to granulate.

[0047] Next,...

Embodiment 2

[0054] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0055] The ratio of each main component is respectively:

[0056] Fe 2 o 3 70mol

[0057] MnO 15mol

[0058] ZnO 15mol

[0059] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0060]

[0061]

[0062] Nano-SiO with a particle size range of 100-200nm 2 70PPM.

[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 granulat...

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 17mol

[0078] ZnO 11mol

[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 50-200nm 2 100PPM.

[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] Nex...

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Abstract

The invention provides a soft magnetic ferrite material with a high Bs value and low power loss and a preparation method of a magnetic core of the soft magnetic ferrite material. A main formula and effective doping are preferably selected, the soft magnetic ferrite material with the high Bs value and the low power loss is developed, the final product has a crystal grain size of 3-4 [mu]m, the initial permeability ui reaches 2200 or more, the power loss at temperature of 80-120 DEG C, 100 kHz and a Bs value of 200 mT is 380-420 kW / m<3>, and the Bs value at temperature of 100 DEG C is 450 mT ormore; a multi-stage balanced atmosphere sintering method is adopted, the density, crystal grain size, porosity and distribution in and among crystal grains of the ferrite material are controlled, so that a microstructure of soft magnetic ferrite is more effectively controlled to ensure main characteristic parameters of the material to reach harmonious unification; and the final product has high quality, and the production costs are reduced by 20% or more.

Description

technical field [0001] The invention relates to a soft ferrite material, in particular to a high Bs value, low power loss soft ferrite material and a preparation method for a magnetic core. 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 magnetic ferrite materials have been includ...

Claims

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Application Information

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IPC IPC(8): C04B35/38C04B35/622C04B35/64H01F1/34
CPCC04B35/2633C04B35/2658C04B35/622C04B35/64C04B2235/3208C04B2235/3244C04B2235/3256C04B2235/3293C04B2235/3298C04B2235/5436C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/77H01F1/344
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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