High-frequency anti-interference manganese zinc ferrite and preparation method thereof

A manganese-zinc ferrite, high-frequency technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of limited scope of application, decrease in magnetic core permeability, etc., and achieve strong adaptability to the working environment , flat temperature curve, good temperature rise characteristics

Inactive Publication Date: 2019-11-15
SUZHOU GUANDA MAGNET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the Curie temperature of 12K (Ui=12000±25%) MnZn ferrite material is generally around 115°C, and the magnetic permeability of the magnetic core will drop sharply after exceeding 115°C, which severely limits the scope of application of this type of product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-frequency anti-interference manganese-zinc ferrite, the components of the high-frequency anti-interference manganese-zinc ferrite include main material components and auxiliary material components, and the components of the main material are calculated by mole percentage, and the proportion is as follows: Down:

[0030] Fe 2 o 3 52.00mol%

[0031] ZnO 9.5mol%

[0032] The rest is Mn 3 o 4 ;

[0033] The auxiliary material component is based on the weight of the main material, and the proportioning ratio is as follows:

[0034] CaO 0.001 wt%

[0035] Nanoscale BaTiO 3 0.08 wt%

[0036] Bi 2 o 3 0.001 wt%

[0037] Nb 2 o 5 0.001wt%

[0038] HfO 2 0.20 wt%

[0039] co 2 o 3 0.30 wt%.

[0040] Fe in the main material component 2 o 3 The purity is more than 99.5%, preventing Fe 2 o 3 Impurities in it affect the magnetic permeability of the final product.

[0041] The Mn of the main material component 3 o 4 It is a nano-scale high specif...

Embodiment 2

[0056] A high-frequency anti-interference manganese-zinc ferrite, the components of the high-frequency anti-interference manganese-zinc ferrite include main material components and auxiliary material components, and the components of the main material are calculated by mole percentage, and the proportion is as follows: Down:

[0057] Fe 2 o 3 54.0mol%

[0058] ZnO 11mol%

[0059] The rest is Mn 3 o 4 ;

[0060] The auxiliary material component is based on the weight of the main material, and the proportioning ratio is as follows:

[0061] CaO 0.025 wt%

[0062] Nanoscale BaTiO 3 0.06 wt%

[0063] Bi 2 o 3 0.003 wt%

[0064] Nb 2 o 5 0.01 wt%

[0065] HfO2 0.1 wt%

[0066] co 2 o 3 0.15 wt%.

[0067] Fe in the main material component 2 o 3 The purity is more than 99.5%, preventing Fe 2 o 3 Impurities in it affect the magnetic permeability of the final product.

[0068] The Mn of the main material component 3 o 4 It is a nano-scale high specific su...

Embodiment 3

[0083] A high-frequency anti-interference manganese-zinc ferrite, the components of the high-frequency anti-interference manganese-zinc ferrite include main material components and auxiliary material components. Down:

[0084] Fe 2 o 3 55.0mol%

[0085] ZnO 12.5mol%

[0086] The rest is Mn 3 o 4 ;

[0087] The auxiliary material component is based on the weight of the main material, and the proportioning ratio is as follows:

[0088] CaO 0.035 wt%

[0089] Nanoscale BaTiO 3 0.05 wt%

[0090] Bi 2 o 3 0.005 wt%

[0091] Nb 2 o 5 0.02 wt%

[0092] HfO 2 0.003wt%

[0093] co 2 o 3 0.08 wt%.

[0094] Fe in the main material component 2 o 3 The purity is more than 99.5%, preventing Fe 2 o 3 Impurities in it affect the magnetic permeability of the final product.

[0095] The Mn of the main material component 3 o 4 It is a nano-scale high specific surface area powder, which improves the reaction speed during ferrite conversion.

[0096] The preparati...

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Abstract

The invention discloses high-frequency anti-interference manganese zinc ferrite and a preparation method thereof. The high-frequency anti-interference manganese zinc ferrite comprises a main materialand an auxiliary material, wherein the auxiliary material comprises CaO, nano-grade BaTiO3, Bi2O3, Nb2O5, HfO2 and Co2O3. The preparation method comprises steps of material mixing, pre-sintering, auxiliary material mixing, molding and sintering, wherein material mixing is implemented in a mode of pulping raw materials, performing ball milling, grinding and mixing, and implementing a spray drying mode so as to obtain a powder material. By adopting the mode, the doping and mixing uniformity of raw materials and auxiliary materials can be improved, the Curie temperature of an original 12K material can be increased to 125 DEG C from 115 DEG C, the adaptability of a product to a working environment can be effectively improved, a good impedance characteristic can be achieved, EMC (Electro Magnetic Compatibility) safety requirements can be met, and the use demand of interference prevention at a high-frequency working section of 10-40MHz can be met.

Description

technical field [0001] The invention relates to the field of manganese-zinc ferrite, in particular to a high-frequency anti-interference manganese-zinc ferrite. Background technique [0002] As the size of electronic instruments and equipment tends to be miniaturized, the demand for high-density, lightweight, and thin high-performance electronic components has increased significantly. Manganese zinc ferrite is widely used in anti-electromagnetic interference noise filters, electronic circuit broadband transformers and integrated service digital networks, local area networks, wide area networks, It is widely used in pulse transformers in fields such as background lighting. Among them, the Curie temperature of 12K (Ui=12000±25%) MnZn ferrite material is generally around 115°C, and the magnetic permeability of the magnetic core will drop sharply after exceeding 115°C, which severely limits the scope of application of this type of product . Contents of the invention [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38H01F1/11H01F41/02
CPCC04B35/2633C04B35/265C04B2235/3234C04B2235/3244C04B2235/3251C04B2235/3298C04B2235/96H01F1/11H01F41/0266
Inventor 徐洋胡晓明李美伟
Owner SUZHOU GUANDA MAGNET
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