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Manganese zinc ferrite magnetic material and preparation method of manganese zinc ferrite magnetic ring

A technology of manganese-zinc ferrite and magnetic materials, which is applied in the fields of magnetism of inorganic materials, manufacture of inductors/transformers/magnets, circuits, etc., can solve problems that are difficult to have high saturation magnetic flux density, wide temperature and DC superposition characteristics at the same time, Achieve the best DC superposition characteristics, improve the magnetic permeability, and the effect of high saturation magnetic flux density

Active Publication Date: 2019-12-13
湖南艾迪奥电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a MnZn ferrite magnetic material and a preparation method of a MnZn ferrite magnetic ring, in order to solve the problem that the existing MnZn ferrite magnetic ring has high magnetic permeability. Problems with high saturation magnetic flux density, better wide temperature range and DC superposition characteristics

Method used

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  • Manganese zinc ferrite magnetic material and preparation method of manganese zinc ferrite magnetic ring

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preparation example Construction

[0043] see figure 1 , the preparation method of the manganese zinc ferrite magnetic ring provided by the embodiment of the present application includes the following steps:

[0044] Step S1, mixing raw materials Fe2O3, Mn3O4 and ZnO to obtain a mixture, the mass percentages of Fe2O3, Mn3O4 and ZnO are: Fe2O3: 72wt%-73wt%, Mn3O4: 14wt%-15wt%, ZnO: 11wt%-12wt% %;

[0045] Step S2, performing a pelletizing process on the mixture to obtain spherical particles with a predetermined diameter;

[0046] Step S3, performing a pre-sintering process on the spherical particles to obtain a pre-sintered material;

[0047] Step S4, adding impurities Co2O3 and Bi2O3 to the calcined material, the mass percentages of Co2O3 and Bi2O3 are: Co2O3: 0.2wt%-0.4wt%, Bi2O3: 0.4wt%-0.5wt%;

[0048] Step S5, mixing the calcined material after adding impurities and deionized water according to the mass ratio of 3:2 to obtain a calcined material mixture, and performing a ball milling process on the calci...

Embodiment 1

[0055] Mixing: raw materials with a content of more than 99.95% are uniformly mixed to obtain a mixture. Specifically: the raw material Fe 2 o 3 , Mn 3 o 4 , ZnO and CaCO 3 mixed to obtain a mixture, the Fe 2 o 3 , Mn 3 o 4 , ZnO and CaCO 3 The mass percentage is: Fe 2 o 3 :72.82wt%, Mn 3 o 4 :14.86wt%, ZnO:11.64wt%, CaCO 3 : 0.06wt%.

[0056] Among them, by increasing Fe in raw materials 2 o 3 content, reduce the content of ZnO in raw materials, and reasonably set Fe 2 o 3 And the ratio of ZnO can increase the Curie temperature and saturation magnetic flux density. Join CaCO 3 After the raw materials are mixed evenly, Ca(OH) can be generated in the subsequent pre-calcination reaction 2 , which is conducive to the ferriteization of the product.

[0057] Pelletizing: Use a pelletizing machine to make the mixture into spherical particles with a diameter of about 5mm and a certain strength.

[0058] Pre-fired: The spherical particles are fully pre-fired in a...

Embodiment 2

[0070] Mixing: raw materials with a content of more than 99.95% are uniformly mixed to obtain a mixture. Specifically: the raw material Fe 2 o 3 , Mn 3 o4 , ZnO and CaCO 3 mixed to obtain a mixture, the Fe 2 o 3 , Mn 3 o 4 , ZnO and CaCO 3 The mass percentage is: Fe 2 o 3 :72.66wt%, Mn 3 o 4 :14.48wt%, ZnO:11.70wt%, CaCO 3 : 0.07wt%.

[0071] Pelletizing: Use a pelletizing machine to make the mixture into spherical particles with a diameter of about 5mm and a certain strength.

[0072] Pre-fired: The spherical particles are fully pre-fired in an orbital kiln to make a pre-fired material. The time of the pre-sintering process is 3 hours, and the maximum temperature of the pre-sintering process is 940°C.

[0073] Doping: adding impurity Co to the calcined material 2 o 3 、 Bi 2 o 3 、TiO 2 , KCl. The Co 2 o 3 、 Bi 2 o 3 、TiO 2 , the mass percent of KCl is: Co 2 o 3 : 0.34wt%, Bi 2 o 3 : 0.04wt%, TiO 2 : 0.64wt%, KCl: 0.07wt%.

[0074] Ball milling: ...

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Abstract

The embodiment of the application discloses a manganese-zinc ferrite magnetic material and a preparation method for a manganese-zinc ferrite magnetic ring. The material consists of: 72 weight percent to 73 weight percent of Fe2O3, 11 weight percent to 12 weight percent of ZnO, 14 weight percent to 15 weight percent of Mn3O4, 0.2 weight percent to 0.4 weight percent of Co2O3 and 0.4 weight percent to 0.5 weight percent of Bi2O3. The method includes the following steps: the Fe2O3, the Mn3O4 and the ZnO are mixed according to the proportion, pelletizing and presintering processes are carried out; the Co2O3 and the Bi2O3 are added, wherein the Co2O3 is 0.2 weight percent to 0.4 weight percent, and the Bi2O3 is 0.4 weight percent to 0.5 weight percent; and ball milling, pulverization, pressing and sintering processes are carried out. Besides high magnetic conductivity, the produced manganese-zinc ferrite magnetic ring also has high-saturation magnetic flux density and good wide-temperature range resistance and direct current superposition characteristic.

Description

technical field [0001] The present application relates to the technical field of manganese zinc ferrite magnetic materials, in particular to a preparation method of a manganese zinc ferrite magnetic material and a manganese zinc ferrite magnetic ring. Background technique [0002] Manganese zinc ferrite magnetic ring is a commonly used anti-interference component in electronic devices, which has a good suppression effect on high-frequency signals. Electronic devices are developing toward miniaturization, which puts forward higher requirements on the magnetic properties of MnZn ferrite magnetic materials. Since the improvement of the magnetic permeability of the manganese zinc ferrite magnetic material is beneficial to the miniaturization of electronic devices, how to improve the magnetic permeability of the manganese zinc ferrite magnetic material has always been a hot spot in research and development in the industry. Manganese zinc ferrite magnetic rings are widely used, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/36C04B35/26C04B35/622C04B41/82H01F41/02
CPCC04B35/2633C04B35/622C04B41/009C04B41/46C04B41/82C04B2235/3208C04B2235/3262C04B2235/3275C04B2235/3284C04B2235/3298H01F1/36H01F41/0266
Inventor 曾勇俞卫国
Owner 湖南艾迪奥电子科技有限公司