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Preparation method of mnzn ferrite material

A technology of ferrite material and mixed material, applied in the field of MnZn ferrite material, can solve the problem of inability to obtain MnZn ferrite material and the like

Active Publication Date: 2016-08-24
娄底市玖鑫电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a MnZn ferrite material and a preparation method thereof to solve the problem that the preparation method in the prior art cannot obtain MnZn ferrite materials with high magnetic permeability and resistivity in a wide frequency range

Method used

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  • Preparation method of mnzn ferrite material
  • Preparation method of mnzn ferrite material

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preparation example Construction

[0024] Please refer to the attached figure 1 , figure 1 It is a flow chart of a preparation method of a MnZn ferrite material provided by the present invention. figure 1 The flowchart shown includes:

[0025] S101. Ingredients: take Fe 2 o 3 , MnO and ZnO are mixed to obtain a mixture, wherein the mass percentage of each component of the mixture is as follows: Fe 2 o 3 :67~72wt%; ZnO:5~16wt%; MnO:12~28wt%.

[0026] S102. Tablet compression: compress the mixed material powder into tablets.

[0027] S103. Pre-calcination: pre-calcine the pressed material powder in a rotary kiln, the pre-calcination temperature is 950° C., and the pre-calcination time is 40 minutes.

[0028] S104. Doping: Adding one or more auxiliary ingredients in a certain mass percentage to the pre-burned mixture.

[0029] S105, sand milling: according to the weight ratio of the doped mixture and deionized water is 2:1, mix the mixture with deionized water, add to the sand mill, sand mill for 30-180min...

Embodiment 1

[0036] (1) Ingredients: Take Fe 2 o 3 , MnO and ZnO are mixed to obtain a mixture, wherein the mass percentage of each component of the mixture is as follows: Fe 2 o 3 :67wt%; ZnO:5wt%; MnO:16wt%;

[0037] (2) Tablet compression: compress the mixed material powder into tablets;

[0038] (3) Pre-burning: Pre-burning the powder pressed into tablets in a rotary kiln, the pre-burning temperature is 950°C, and the pre-burning time is 40 minutes;

[0039] (4) Doping: Add the following auxiliary components accounting for the total weight of the mixture to the pre-fired mixture: TiO 2 : 0.1wt%; Bi 2 o 3 : 0.1wt%; CaCO3 : 0.1wt%;

[0040] (5) Sand milling: Mix the doped mixture and deionized water at a weight ratio of 2:1, then add it to the sand mill, sand mill for 60 minutes, and the sand mill speed is 2000 rpm, and the sand mill after sand mill The average particle size of the abrasive was 1.1 microns.

[0041] (6) Granulation: Use a spray tower to make the sand abrasive in...

Embodiment 2

[0045] (1) Ingredients: Take Fe 2 o 3 , MnO and ZnO are mixed to obtain a mixture, wherein the mass percentage of each component of the mixture is as follows: Fe 2 o 3 : 70wt%; ZnO: 10wt%; MnO: 15wt%;

[0046] (2) Tablet compression: compress the mixed material powder into tablets;

[0047] (3) Pre-burning: Pre-burning the powder pressed into tablets in a rotary kiln, the pre-burning temperature is 950°C, and the pre-burning time is 40 minutes;

[0048] (4) Add the following auxiliary components accounting for the following percentage of the total weight of the mixture in the pre-burned mixture: TiO 2 : 0.1wt%; Bi 2 o 3 : 0.1wt%; CaCO 3 : 0.1wt%; SnO 2 : 0.2wt%; Nb 2 o 5 :0.1wt%; MoO 3 :0.1wt%; V 2 o 5 : 0.1 wt%.

[0049] (5) According to the weight ratio of the mixed material after doping and deionized water is 2:1, add it into the sand mill, sand mill for 60min, and the sand mill speed is 2000 rpm, the average particle size of the sand abrasive after sand mill ...

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Abstract

The invention discloses a MnZn ferrite material and a preparation method thereof. The material comprises the following main components: 67-72wt% of Fe2O3, 5-16wt% of ZnO and 12-28wt% of MnO. The preparation method comprises the following steps: mixing the main components according to a mass ratio; and sequentially pressing, pre-sintering, doping, sanding, granulating, molding and sintering the mixed materials, wherein the sintering step is performed in a bell-type furnace and comprises three stages such as heating, heat preservation and cooling, the oxygen content at the heat preservation stage is 21 percent, the upper end of the bell-type furnace is connected with an exhaust fan, and the negative pressure in the furnace is 200Pa below zero to 20Pa below zero. According to the MnZn ferrite material prepared by the method, the magnetic conductivity in a wide frequency range of 1kHz to 1MHz is more than 4000, the electrical resistivity is more than 10ohm.m, and the problem that the MnZn ferrite material with high magnetic conductivity and electrical resistivity in the wide frequency range cannot be obtained by the conventional preparation method is solved.

Description

technical field [0001] The invention relates to a MnZn ferrite material, in particular to a MnZn ferrite material and a preparation method thereof. Background technique [0002] In the era of electronic information, with the rapid development of electronic technologies such as satellite communications, mobile communications, and computer applications, electromagnetic interference (EMI, Electromagnetic Interference, mainly refers to the interference phenomenon caused by the interaction between electromagnetic waves and electronic components) has become increasingly popular in military and civilian electronic information. The influence of the field is becoming more and more serious, which has caused great harm to the public environment, personal safety and information confidentiality. An effective way to solve or reduce electromagnetic pollution and improve the anti-EMI ability of electronic equipment is to adopt electromagnetic compatibility (EMC, Electro Magnetic Compatibili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 林开品朱再元赵纯兵
Owner 娄底市玖鑫电子科技有限公司