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A kind of ferrite material with high stacking and high magnetic permeability and preparation method thereof

A ferrite material, high permeability technology, applied in the field of ferrite synthesis, can solve the problems of low saturation magnetic flux density, impedance matching error, harmonic distortion failure, etc., achieve high permeability, improve permeability rate, the effect of increasing the saturation magnetic flux density

Active Publication Date: 2021-12-07
湖北微硕新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the core device of network signal transmission, the magnetic core directly affects the distortion of the transmission signal. Since the network transmission signal contains a large voice signal, this part of the signal contains a large DC component. When using ordinary magnetic permeability When the material is 5000 or 10000, the inductance often drops when the magnetic permeability encounters a voice signal with a large DC component. One of the main reasons is that the saturation magnetic flux density of these materials is relatively low, only It is about 420mT, and the Curie temperature of these materials is generally low, and the material with a magnetic permeability of 10,000 is generally only 130°C. In some harsh application environments, the safety margin is insufficient.
[0003] For example, the patent document CN 102693807 A of DMEGC discloses a MnZn power ferrite with ultra-wide temperature, low loss and high magnetic flux density and its preparation method. , 200mT, 25°C power consumption ≤390mW / cm3, 120°C power consumption ≤330mW / cm3, 140°C power consumption ≤400mW / cm3, under 1194A / m, 50Hz conditions, 25°C saturation magnetic Flux density ≥ 540, this material has good wide temperature and low loss performance, but it cannot avoid the phenomenon of harmonic distortion failure and impedance matching error caused by the inductance drop of the magnetic core when the network transformer encounters a DC component

Method used

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  • A kind of ferrite material with high stacking and high magnetic permeability and preparation method thereof

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Effect test

Embodiment 2

[0036] A high-stack, high-permeability ferrite material and a preparation method thereof, comprising the following steps:

[0037] (1) Take a certain mass ratio of 58.8mol% composite carbonyl iron powder, 16.2mol% Mn 3 o 4 , 19.5mol% ZnO, 5.5mol% NiO mixture, add zirconium balls and liquid forming material: after the ball: liquid ratio is 1:1.2:3.5 ball milling medium, put it into the ball mill pot for mixing and ball milling to form powder, ball milling time 110min, the average particle size of the slurry is 1.8μm;

[0038] (2) Use the natural gas rotary kiln to pre-fire the powder obtained in step (1) at 960°C under air conditions for 4 hours, the feed rate is 2-3kg / h, and the rotation speed is 2N / min to obtain the spinel synthesis degree 10-20% ferrite powder;

[0039] (3) Mix the ferrite powder obtained in step (2) with 300ppm CaCO 3 , 100ppmNb 2 o 5 、50ppm Bi 2 o 3 , 50ppmV 2 o 5 Mix and put the mixed material into the ball mill tank for secondary ball milling, ...

Embodiment 3

[0043] A high-stack, high-permeability ferrite material and a preparation method thereof, comprising the following steps:

[0044] (1) Take a certain mass ratio of 61.5mol% composite carbonyl iron powder, 13.3mol% Mn 3 o 4 , 19.8mol% ZnO, 5.4mol% NiO mixture, add zirconium balls and liquid forming material: after the ball: liquid ratio is 1:1.2:3.5 ball milling medium, put it into the ball mill tank for mixing ball milling to form powder, ball milling time 110min, the average particle size of the slurry is 1.8μm;

[0045] (2) Use the natural gas rotary kiln to pre-fire the powder obtained in step (1) at 960°C under air conditions for 4 hours, the feed rate is 2-3kg / h, and the rotation speed is 2N / min to obtain the spinel synthesis degree 10-20% ferrite powder;

[0046] (3) Mix the ferrite powder obtained in step (2) with 200ppm CaCO 3 , 150ppmNb 2 o 5 、50ppm Bi 2 o 3 , 100MoO 3 , 100ppm MgCo-Z type hexagonal dopant, and put the mixed material into the ball mill tank f...

Embodiment 4

[0050] A high-stack, high-permeability ferrite material and a preparation method thereof, comprising the following steps:

[0051] (1) Take a certain mass ratio of 61.1mol% composite carbonyl iron powder, 12.5mol% Mn 3 o 4 , 20.4mol% ZnO, 6.0mol% NiO mixture, add zirconium balls and liquid forming material: after the ball: liquid ratio is 1:1.2:3.5 ball milling medium, put it into the ball mill tank for mixing ball milling to form powder, ball milling time 110min, the average particle size of the slurry is 1.8μm;

[0052] (2) Use the natural gas rotary kiln to pre-fire the powder obtained in step (1) at 960°C under air conditions for 4 hours, the feed rate is 2-3kg / h, and the rotation speed is 2N / min to obtain the spinel synthesis degree 10-20% ferrite powder;

[0053] (3) ferrite powder obtained in step (2) and 100ppmNb 2 o 5 、50ppm Bi 2 o 3 , 100ppmV 2 o 5 , 100MoO 3 , 80ppm MgCo-Z type hexagonal dopant, and put the mixed material into the ball mill tank for second...

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Abstract

The invention belongs to the technical field of ferrite preparation, and relates to a ferrite material with high superposition and high magnetic permeability and a preparation method thereof, including raw materials, auxiliary additives, and MgCo-Z type hexagonal dopant. The raw materials include composite carbonyl iron powder, mn 3 o 4 , a mixture of ZnO and NiO, the content of the composite carbonyl iron powder is 58.8mol% to 61.5mol%, ZnO is 19.5mol% to 21.0mol%, NiO is 5.5mol% to 6.0mol%, and the balance is Mn 3 o 4 , auxiliary additives include CaCO 3 , Nb 2 o 5 、 Bi 2 o 3 , V 2 o 5 、MoO 3 At least four of them. On the basis of the traditional ternary formula system, the present invention adds a small amount of NiO to form a quaternary formula system, which can improve the saturation magnetic flux density and magnetic permeability of the material, and the iron formed under the synergistic effect of each additive While the oxygen body ensures a high Curie temperature and high initial permeability, it can greatly reduce power loss, and can maintain a high saturation magnetic flux density and superposition capability.

Description

technical field [0001] The invention belongs to the technical field of ferrite synthesis, in particular to a ferrite material with high superposition and high magnetic permeability and a preparation method thereof. Background technique [0002] In the field of communication, the materials used for the magnetic core of network transformers are generally in the range of magnetic permeability 4000-10000. This type of network transformer mainly plays the role of signal transmission, impedance matching, and electrical isolation. In order to avoid signal transmission errors , It is generally required that the material used in the magnetic core has low harmonic distortion and high magnetic permeability. As the core device of network signal transmission, the magnetic core directly affects the distortion of the transmission signal. Since the network transmission signal contains a large voice signal, this part of the signal contains a large DC component. When using ordinary magnetic p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/638
CPCC04B35/2658C04B35/622C04B35/638C04B2235/3208C04B2235/3239C04B2235/3251C04B2235/3256C04B2235/3279C04B2235/3298C04B2235/6562C04B2235/6565C04B2235/6567
Inventor 姚木有苏荣佳林正崇谭福清郭皓
Owner 湖北微硕新材料有限公司
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