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Preparation technique for soft-magnetic manganese-zinc ferrite powder

A technology of manganese zinc ferrite and ferrite powder, which is applied in the field of production technology of ferrite magnetic materials, can solve the requirements of miniaturization, light weight and high reliability of magnetic materials, ferrite magnetic materials The initial magnetic permeability is low, it is difficult to meet the environmental protection requirements, etc., to achieve the effect of reducing the secondary sanding time, small power loss, and reducing dust pollution

Active Publication Date: 2008-09-17
MIANYANG KAIYUAN MAGNETIC MATERIAL
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Problems solved by technology

[0003] a. The water content in the raw material after pelletizing is high, the particles are large and uneven, and the solid phase reaction is not sufficient during the pre-burning process, so the ferrite magnetic material made by it has a low initial permeability and power loss Higher, unable to meet the miniaturization, light weight and high reliability requirements of modern electronic products for magnetic materials
[0004] b. Since the raw materials are dry-mixed, correspondingly, the powder pollution in the workplace is serious, and it is difficult to meet the environmental protection requirements
[0005] C. The performance of the products produced by this process can only reach the level equivalent to the PC40 material of Japan TDK Company

Method used

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  • Preparation technique for soft-magnetic manganese-zinc ferrite powder

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Embodiment Construction

[0017] Embodiments of the present invention are as follows: the production technology of soft magnetic manganese zinc ferrite powder, its production technology is carried out according to the following steps:

[0018] a. Put the raw materials ferric oxide, zinc oxide, and manganese tetraoxide (or manganese carbonate) into a sand mill with deionized water, and mix the raw materials with the steel ball at the lower end of the sand mill through the rotation of the stirring rod , Grinding. Then the ground slurry is subjected to spray granulation, and its average particle size is controlled at about 2.5 μm;

[0019] b. Pre-burn the spray granulated material, and then put the pre-fired material into the vibrating ball mill. The steel balls in the machine vibrate and grind the pre-fired material during the vibration process. The pre-fired material with a fineness below 1.5μm will pass through the sieve leaked;

[0020] c. The fine material after vibratory ball milling is subjected ...

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Abstract

The invention discloses a manufacturing technique of magnetic ferrite material, in particular to a manufacturing technique of flexible magnetic manganese-zinc ferrite powder, which comprises the following steps: wetting to grind; spraying; graining; pre-sintering; vibrating and balling the pre-sintered material; proceeding secondary wet-grinding and secondary spraying graining. The invention is beneficial to finish solid phase completely during pre-sintering, which reduces power consumption and power dust pollution with high original magnetic conductivity.

Description

(1) Technical field [0001] The invention relates to a production process of ferrite magnetic materials, in particular to a production process of soft magnetic manganese zinc ferrite powder. (2) Background technology [0002] Ferrite magnetic materials are the basic functional materials of modern electronics, communication equipment and components. The powder production process of ferrite magnetic materials is generally: one-time dry mixing → pelletizing → pre-calcination → sand milling → spray granulation. Dry mixing is to stir and mix the main raw materials ferric oxide, zinc oxide, and manganese tetraoxide (or manganese carbonate) in a mixer in a certain proportion. Pelletizing is to form a spherical shape after spraying water on the mixture, which is convenient for pre-burning. The shortcoming that above-mentioned existing powder material production technique exists is: [0003] a. The water content in the raw material after pelletizing is high, the particles are large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 汪伟张忠仕李卫陈文黄定友康杰
Owner MIANYANG KAIYUAN MAGNETIC MATERIAL
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