High bs value, low power loss soft ferrite material and preparation method of magnetic core

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

Active Publication Date: 2021-03-02
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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  • High bs value, low power loss soft ferrite material and preparation method of magnetic core

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0041] The ratio of each main component is respectively:

[0042] Fe 2 o 3 68mol

[0043] MnO 17mol

[0044] ZnO 15mol

[0045] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0046] CaCO 3 100PPM

[0047] SnO 2 100PPM

[0048] MoO 3 50PPM

[0049] ZrO 2 100PPM

[0050] Bi 2 o 3 50PPM

[0051] Nano-SiO with a particle size range of 50-100nm 2 50PPM.

[0052] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0053] First, each main component and each additive component are weighed and mixed uniformly.

[0054] 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%.

[0055] Then...

Embodiment 2

[0063] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0064] The ratio of each main component is respectively:

[0065] Fe 2 o 3 70mol

[0066] MnO 15mol

[0067] ZnO 15mol

[0068] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0069] CaCO 3 500PPM

[0070] SnO 2 200PPM

[0071] MoO 3 70PPM

[0072] ZrO 2 300PPM

[0073] Bi 2 o 3 70PPM

[0074] Nano-SiO with a particle size range of 100-200nm 2 70PPM.

[0075] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0076] First, each main component and each additive component are weighed and mixed uniformly.

[0077] 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%.

[00...

Embodiment 3

[0086] The soft ferrite material of this embodiment includes main components and additive components, wherein,

[0087] The ratio of each main component is respectively:

[0088] Fe 2 o 3 72 mol

[0089] MnO 17mol

[0090] ZnO 11mol

[0091] Relative to the total amount of main components, the weight ratios of each additive component are respectively:

[0092] CaCO 3 1000PPM

[0093] SnO 2 500PPM

[0094] MoO 3 100PPM

[0095] ZrO 2 500PPM

[0096] Bi 2 o 3 100PPM

[0097] Nano-SiO with a particle size range of 50-200nm 2 100PPM.

[0098] The preparation steps of the soft ferrite core with high Bs value and low power loss are as follows:

[0099] First, each main component and each additive component are weighed and mixed uniformly.

[0100] 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%.

[0101]...

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Abstract

The present invention proposes a preparation method of a high Bs value, low power loss soft ferrite material and magnetic core, optimizes the main formula and effective doping, develops a high Bs, low power consumption soft ferrite material, and the final product The grain size is 3-4μm, the initial magnetic permeability ui reaches more than 2200, and the power loss is 380-420kW / m at 80℃~120℃, 100kHz, 200mTBs value 3 , and the Bs value at 100°C is above 450mT; the multi-stage balanced atmosphere sintering method is adopted to control the density, grain size, porosity and their distribution inside and between the grains of the ferrite material, so that the soft magnetic ferrite The microstructure of the material is more effectively controlled, thereby ensuring that the main characteristic parameters of the material are harmoniously unified; the quality of the final product is high, and the production cost is reduced by more than 20%.

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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Patent Type & Authority Patents(China)
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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