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High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof

A soft magnetic ferrite and production process technology, applied in the direction of inorganic material magnetism, can solve the problems of high production cost, difficult implementation, large investment in equipment, etc., and achieve low production cost, low power loss, and good frequency characteristics.

Inactive Publication Date: 2005-10-05
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology

[0004] Publication No. CN1287985A introduces a "magnetic ferrite material" invented by TDK Corporation of Japan. Although it has high magnetic permeability, high resistivity and low loss characteristics, because of the high purity requirements of the raw materials required for production, it is used in powder The preparation of the material adopts the spray roasting production process. Its equipment investment is large and the production cost is high, which is difficult to implement in China. In order to meet the demand for soft ferrite materials in the domestic market, a high-frequency soft magnet is developed and produced in combination with the actual conditions of the country. Oxygen material is an urgent problem to be solved

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  • High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof
  • High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof
  • High-frequency fine crystalline grain soft ferrimagnet material and productive technology thereof

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[0014] The high-frequency fine-grain soft ferrite material of the present invention is made of iron oxide, zinc oxide and manganese oxide as main raw materials, and the average grain size of the soft ferrite material is 3-5 μm, The range of weight percentages of each component in terms of oxides is: Fe 2 o 3 : 50-57%; ZnO: 0-13%; MnO: 30-50%; the rest is the doping component M.

[0015] The production process of the high-frequency fine-grain soft ferrite material is carried out according to the following steps: batching-ball milling-vibration milling-pre-sintering-sand milling-granulation-molding-sintering-grinding processing and packaging, the ball milling process V-shaped mixer is used for dry strong mixing, and the mixing time is 0.5-1h. The pre-firing process uses an air kiln to directly pre-fire the powder at a temperature of 900-1000°C, and the time is 1-3 hours; the sanding process Use a circulating sand mill for sanding, and the sanding time is 1 to 3 hours; material...

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Abstract

This invention relates to a high frequency fine grain soft magnetic ferrite material made up of Fe2O3, ZnO and MnO characterizing that the mean size of the grain is 3-5 mu m, the weight percentage of each component in terms of oxide is: Fe2O3:50-57%, ZnO: 0-13%, MnO: 30-50%, the rest is doped component M. The applied technology steps are as follows: mixing materials, ball mill, vibration mill, preburning, sanding, prilling, formation, sinter, grinding and packing with the advantages of high magnetic conductivity and small power loss.

Description

technical field [0001] The invention relates to the technical field of soft ferrite, in particular to a high-frequency fine-grain soft ferrite magnet material and a production process thereof. Background technique [0002] Soft ferrite magnet is a material with high magnetic permeability, high resistivity and low loss characteristics, so it is widely used in transformers, inductors, switching power supplies, communication equipment, filters, computer electronic rectifiers and other fields; With the rapid development of information industry technology and the continuous updating and improvement of electronic equipment manufacturing technology, the demand for high-frequency and low-power consumption materials for high-performance switching power supplies in the magnetic core component market will increase. The loss of soft ferrite under alternating field can basically be divided into three types: hysteresis loss, eddy current loss and residual loss, etc. During the manufacturi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26H01F1/34
Inventor 何时金包大新刘亚丕
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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