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Manganese-zinc ferrite material and preparation method thereof

A technology of manganese zinc ferrite and powder, which is applied in the field of manganese zinc ferrite material and its preparation, can solve the problems of large Curie temperature of 150°C and low temperature coefficient, and achieve high Curie temperature and low temperature The effect of the coefficient

Inactive Publication Date: 2009-10-21
HAINING LIANFENG MAGNET IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] At present, the manganese-zinc ferrite materials with relatively strong comprehensive properties reported at home and abroad, generally have a manganese-zinc ferrite material with an initial magnetic permeability of about 5000, and the magnetic permeability has a lower temperature in the range of 20 ° C to 70 ° C. Coefficient, after exceeding this temperature, the temperature coefficient is relatively large, and the Curie temperature is about 150°C, such as the HP5, DN40, DNW45 materials of the famous ferrite company TDK, and the T57, N30, T65 materials of EPCOS, but they are still not very good To meet the actual needs, the comprehensive performance needs to be further improved

Method used

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  • Manganese-zinc ferrite material and preparation method thereof
  • Manganese-zinc ferrite material and preparation method thereof

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Embodiment 1

[0024] Embodiment 1 Manganese zinc ferrite material is made up of main component and additive, and its main component (mol percentage) is: 52.5% Fe 2 o 3 Powder, 10% ZnO powder, 37.5% MnO powder; additives (accounting for the percentage of the total weight of main components) include 0.01% CaO powder, 0.1% TiO 2 Powder, 0.01% Co 2 o 3 Powder; additives also include 0.01% V 2 o 5 , 0.01% Bi 2 o 3 , 0.01% MoO 3 .

Embodiment 2

[0025] Embodiment 2 Manganese zinc ferrite material is made up of main component and additive, and its main component (mol percentage) is: 53.5% Fe 2 o 3 Powder, 15% ZnO powder, 31.5% MnO powder; additives (accounting for the percentage of the total weight of main components) include 0.05% CaO powder, 0.2% TiO 2 Powder, 0.15% Co 2 o 3 Powder; additives also include 0.05% V 2 o 5 , 0.05% Bi 2 o 3 .

Embodiment 3

[0026] Embodiment 3 Manganese zinc ferrite material is made up of main component and additive, and its main component (mol percentage) is: 55% Fe 2 o 3 Powder, 18% ZnO powder, 27% MnO powder; Additives (accounting for the percentage of main component total weight) include 0.2% CaO powder, 0.5% TiO 2 Powder, 0.5% Co 2 o 3 Powder; additives also include 0.2% V 2 o 5 .

[0027] The preparation method of manganese zinc ferrite material of the present invention comprises the following steps:

[0028] 1) Prepare the main component powder and mix the main component powder evenly;

[0029] 2), pre-burn the powder obtained in step 1) at 800-1150°C, and the holding time for pre-burning is 0.2-4 hours;

[0030] 3), adding additives to the powder obtained in step 2) according to the mass percentage and further pulverizing, then adding PVA solution and sanding it into slurry;

[0031] 4), the slurry obtained in step 3) is spray-dried, granulated, and pressed into a green sample.

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Abstract

The invention discloses manganese-zinc ferrite material. The material consists of main components and additives. The main components comprise the following raw materials according to the mol percentage: 52.5 to 55 of Fe2O3 powder, 10 to 18 of ZnO powder, and the balance of MnO powder. The additives comprise the following raw materials according to the weight percentage in the main components: 0.01 to 0.2 of CaO powder, 0.01 to 0.5 of TiO2 powder, and 0.01 to 0.5 of Co2O3 powder. The additives also comprise one or more of V2O5 powder, Bi2O3 powder and MoO3 powder. The invention also provides a preparation method for the manganese-zinc ferrite material. The manganese-zinc ferrite material has comprehensive performances of wide temperature range, low temperature coefficient and high Curie temperature; in the wide temperature range from 25 DEG C below zero to 150 DEG C, the magnetic conductivity of the material has lower temperature coefficient and the Curie temperature reaches as high as above 180 DEG C.

Description

technical field [0001] The invention relates to an electronic material, in particular to a manganese zinc ferrite material and a preparation method thereof. Background technique [0002] Manganese zinc ferrite is currently the largest and most widely used soft ferrite material. It is widely used in household appliances, computers, mobile phones, communications, office automation, displays, remote monitoring, audio-visual devices, electromagnetic compatibility, green lighting, In the electronic field such as environmental protection and energy saving, the application field of soft ferrite is still expanding, which is closely related to people's daily life. MnZn ferrite can generally be divided into two categories: high permeability ferrite and power ferrite. High permeability ferrite is used for signal transmission and conversion, mainly used in electronic circuit broadband transformers, pulse transformers in integrated services digital network (ISDN), local area network (LA...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 李永劬严建强杨晓光徐建松施绩宪范祥法
Owner HAINING LIANFENG MAGNET IND
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