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
CN108640670BActive Publication Date: 2021-03-02湖北华磁电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
湖北华磁电子科技有限公司
Publication Date
2021-03-02

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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%.
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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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