Fabrication method of broad-band high-conductive manganese-zinc ferrite magnetic core

A manganese-zinc ferrite and manufacturing method technology, which is applied in the direction of inductance/transformer/magnet manufacturing, transformer/inductor magnetic core, inorganic material magnetism, etc., can solve the problem of high cost, reduce the cost of preparation, and eliminate the problem of environmental pollution , The effect of enhancing market competitiveness

Inactive Publication Date: 2009-09-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, both the "co-precipitation method and the direct method" have industrial-scale precedents in China, but due to high costs, their operation has been suspended (such as Sichuan Yibin Honghe Electronics and Chongqing Chaosi)

Method used

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  • Fabrication method of broad-band high-conductive manganese-zinc ferrite magnetic core
  • Fabrication method of broad-band high-conductive manganese-zinc ferrite magnetic core

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Effect test

Embodiment 1

[0022] A manufacturing method of a broadband high-conductivity manganese-zinc ferrite core according to the present invention includes processes such as leaching, reduction, purification, co-precipitation, pre-calcination, refining, ball mill mixing, spray granulation, compression molding and sintering . The specific process is:

[0023] After the calcined powder is refined, put it into a ball mill to grind and mix, and add 60ppm Bi 2 o 3 , 50ppmMoO 3 , 30ppmSiO2 2 and 20ppmCaCO 3 Additives, the slurry after grinding and mixing is sprayed and granulated, and the bulk ratio of the granules is 1.31g / cm 3 , moisture content 0.3%, angle of repose 28.6°, particle distribution 60-180 mesh accounts for 87%, 60-100 mesh accounts for 42%. The chemical purity is very high, the content of impurity elements is extremely low, and the silicon content is 58ppm.

[0024] Put the pellets into the mold and press to form, the forming pressure is 0.8T / cm 2 , the density of the pressed gre...

Embodiment approach 2

[0035] A manufacturing method of a broadband high-conductivity manganese-zinc ferrite core according to the present invention includes processes such as leaching, reduction, purification, co-precipitation, pre-calcination, refining, ball mill mixing, spray granulation, compression molding and sintering . The specific process is:

[0036] After the calcined powder is refined, put it into a ball mill to grind and mix, and add 50ppm Bi 2 o 3 , 50ppmMoO 3 , 15ppm SiO 2 Additives, the slurry after grinding and mixing is sprayed and granulated, and the bulk ratio of the granules is 1.33g / cm 3 , moisture content 0.2%, angle of repose 29.4°, particle distribution 60-180 mesh accounts for 89%, 60-100 mesh accounts for 45%. The chemical purity is very high, the content of impurity elements is extremely low, and the silicon content is 53ppm.

[0037] Put the pellets into the mold and press to form, the forming pressure is 0.9T / cm 2 , the density of the pressed green body is 3.0g / c...

Embodiment approach 3

[0046] A manufacturing method of a broadband high-conductivity manganese-zinc ferrite core according to the present invention includes processes such as leaching, reduction, purification, co-precipitation, pre-calcination, refining, ball mill mixing, spray granulation, compression molding and sintering . The preparation of the wet powder has been patented, and the specific process of the ferrite that matches the powder is:

[0047] After the calcined powder is refined, put it into a ball mill to grind and mix, and add 50ppm Bi 2 o 3 , 40ppmMoO 3 , 10ppm SiO 2 Additives, the slurry after grinding and mixing is sprayed and granulated, and the bulk ratio of the granules is 1.34g / cm 3 , moisture content 0.4%, angle of repose 28.9°, particle distribution 60-180 mesh accounts for 86%, 60-100 mesh accounts for 40%. The chemical purity is very high, the content of impurity elements is extremely low, and the silicon content is 51ppm.

[0048] Put the pellets into the mold and pre...

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Abstract

The invention provides a fabrication method of a broad-band high-conductive manganese-zinc ferrite magnetic core, which utilizes manganese-zinc soft magnetic waste as a raw material and obtains compound powder with low impurity content by reinforced lixiviation, reduction and purification and coprecipitation. The compound powder is dried and pre-burned and then refined; then the powder is ground and mixed in a ball mill; an additive is added for spray granulation; and finally the magnetic core is formed by burning after pressing and shaping. The method comprises the steps of first fabricating the pre-burned powder with high purity by wet processing, then adding the additive for improving the frequency characteristic and loss characteristic of materials and adjusting the burning process, thus being capable of stably fabricating the manganese-zinc ferrite magnetic core material of which the magnetic permeability reaches 12K, Curie temperature reaches 130 DEG C and the usage frequency amounts to 300 KHz; and simultaneously, the fabrication method sharply reduces the fabrication cost of the manganese-zinc ferrite magnetic core material and enhances the market competitiveness of products.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a manufacturing method of a broadband high-conductivity manganese-zinc ferrite core. Background technique [0002] High-permeability ferrite magnetic powder and magnetic core are essential electronic components for miniaturization and lightening of inductors, filters, pulse transformers and other products in electronic equipment such as program-controlled communication, digital technology, and network communication color TVs. Material. The goal of continuously improving the initial magnetic permeability value in magnetic materials has always been the pursuit of engineers and manufacturers engaged in this profession. Our country has used the traditional oxide method to develop high magnetic permeability materials for more than 40 years. Up to now, the high magnetic permeability materials produced by the oxide method can only reach about 10,000, and the performance indicators of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34H01F27/24H01F41/02B22F9/06B22F3/12C04B35/26C04B35/645
Inventor 彭长宏陈带军黄虹
Owner CENT SOUTH UNIV
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