Broadband high-permeability high-impedance manganese-zinc ferrite and preparation method thereof

A manganese-zinc ferrite and high permeability technology, applied in the field of magnetic materials, can solve the problems of high permeability in low frequency band, high resistivity and high impedance in high frequency band, and achieve the effect of high permeability and cost reduction.

Inactive Publication Date: 2020-12-29
临沂春光磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with NiZn ferrite, MnZn ferrite has low resistivity and high dielectric constant, so it is difficult to adapt to high-frequency use above 1MHz, so most of the devices used at frequencies above 1MHz are NiZn ferrite materials
However, the NiZn material has high manufacturing cost, low magnetic permeability and impedance in the low frequency band, and its application is also limited.
Iron-poor MnZn ferrite material has high magnetic permeability in low frequency band and high resistivity, so the impedance in high frequency band is also high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The manganese-zinc ferrite with wide frequency, high magnetic permeability and high impedance of the present invention includes functional components and auxiliary components, and the functional components and their dosage are: Fe 2 o 3 : 48.5mol%, ZnO: 17.5mol%, MnO: 34mol%; the auxiliary component and the percentage of functional component mass are: 0.01% SiO 2 , 0.03% CaCO 3 , 0.02%Nb 2 o 5 , 0.03%V 2 o 5 , 0.2%TiO 2 , 0.2% SnO 2 and 0.4% Co 2 o 3 .

[0017] Its preparation method, the steps are as follows:

[0018] (1) The functional components are wet mixed; the amount of water added in the wet mixing step is 50% of the total weight of the functional components, and the mixing time is 50 minutes.

[0019] (2) Pre-burning: the mixed materials are dried and placed in a muffle furnace for pre-burning. The pre-burning temperature is 950° C., the pre-burning time is 30 minutes, and the atmosphere is air.

[0020] (3) Add auxiliary components and grind: befor...

Embodiment 2

[0026] The manganese-zinc ferrite with wide frequency, high magnetic permeability and high impedance of the present invention includes functional components and auxiliary components, and the functional components and dosage are: Fe 2 o 3 : 46.5mol%, ZnO: 16.5mol%, the balance is MnO, the sum of the molar ratios of the three functional components is 100%; the auxiliary components and their consumption are: 0.02% SiO 2 , 0.05% CaCO 3 , 0.04% Nb 2 o 5 , 0.03% V 2 o 5 , 0.1% TiO 2 , 0.1% SnO 2 ,0.4%Co 2 o 3 , the amount of auxiliary components is mass percent.

[0027] Its preparation method, the steps are as follows:

[0028] (1) The functional components are wet mixed; the amount of water added in the wet mixing step is 80% of the total weight of the functional components, and the mixing time is 60 minutes.

[0029] (2) Pre-burning: The mixed materials are dried and placed in a muffle furnace for pre-burning. The pre-fired temperature is 900°C, the pre-fired time is 6...

Embodiment 3

[0036] The manganese zinc ferrite of broadband high magnetic permeability and high impedance of the present invention comprises functional component and auxiliary component, and functional component and consumption are:, Fe 2 o 3 : 49.5mol%, ZnO: 18.5mol%, the balance is MnO, the sum of the molar ratios of the three functional components is 100%; the auxiliary components and their consumption are: 0.015% SiO 2 , 0.04% CaCO 3 , 0.03% Nb 2 o 5 , 0.04% V 2 o 5 , 0.15% TiO 2 , 0.16% SnO 2 ,0.6% Co 2 o 3 , the above percentages are percentages by weight. Its preparation method, the steps are as follows:

[0037] (1) The functional components are wet mixed; the amount of water added in the wet mixing step is 70% of the total weight of the functional components, and the mixing time is 50 minutes.

[0038] (2) Pre-burning: the mixed materials are dried and placed in a muffle furnace for pre-burning. The pre-burning temperature is 850° C., the pre-burning time is 50 minutes,...

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Abstract

The invention provides a broadband high-permeability high-impedance manganese-zinc ferrite and a preparation method thereof, relates to the technical field of magnetic materials, and is used for solving the problems of low resistivity, high dielectric constant and in-applicability of a high-frequency manganese-zinc ferrite above 1 MHZ in the prior art, and high cost of a NiZn ferrite applicable atthe high frequency. An iron-poor formula is adopted, the annular magnetic core is obtained through the steps of mixing, pre-sintering, grinding, spray granulation, compression molding and sintering,and the ferrite has high impedance and high magnetic conductivity at 1-100 MH.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a manganese-zinc ferrite with wide frequency, high magnetic permeability and high impedance and a preparation method thereof. Background technique [0002] In the era of electronic information, with the rapid development of communication satellites, mobile communications, and computer applications, the impact of electromagnetic interference (EMI) in the field of military and civilian electronic information is becoming more and more serious, which has caused great harm to the public environment, personal safety, and information confidentiality. great harm. An effective way to solve electromagnetic pollution and improve the anti-electromagnetic interference ability of electronic equipment is to adopt electromagnetic compatibility (EMC) design, which requires a large number of anti-electromagnetic interference materials. With the miniaturization and high-frequency develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/38C04B35/64H01F1/36
CPCC04B35/2633C04B35/265C04B35/64C04B2235/3232C04B2235/3239C04B2235/3251C04B2235/3293C04B2235/3418C04B2235/442C04B2235/608C04B2235/6562C04B2235/6567C04B2235/6585C04B2235/94C04B2235/95C04B2235/96H01F1/36
Inventor 孙科徐士亮宋兴连赵齐民魏秀璐
Owner 临沂春光磁业有限公司
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