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Method for manufacturing ferrite permanent magnet material

A ferrite permanent magnet technology and a manufacturing method, which are applied in the field of high-performance ferrite permanent magnet material manufacturing, can solve problems such as waveform distortion and insufficiently uniform surface remanence of the permanent magnet material, and achieve uniform and consistent surface remanence. Effect

Inactive Publication Date: 2010-11-10
安吉县科声磁性器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in the method step of this invention, there is no step of removing the impurities that affect the performance of the ferrite permanent magnet material. Therefore, the surface remanence of the permanent magnet material made by this method is not uniform enough, and even the distortion of the waveform will occur.

Method used

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  • Method for manufacturing ferrite permanent magnet material
  • Method for manufacturing ferrite permanent magnet material
  • Method for manufacturing ferrite permanent magnet material

Examples

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Effect test

Embodiment 1

[0031] A method for making a ferrite permanent magnet material, comprising the following steps:

[0032] (1) Calcined material ingredients: iron oxide 10000g, light calcium carbonate 10g, kaolin 10g;

[0033](2) After the batching is completed, use ball milling equipment to pulverize and mix the prepared calcined material by wet grinding; add 10 g of sodium hydroxide slowly in small amounts during the wet grinding process; grind slowly until the harmful substance silicon ions Divide;

[0034] (3) pre-burning the material obtained in step (2), and the pre-burning temperature is controlled at 1270 ° C;

[0035] (4) Then carry out 2 times of wet grinding, at this time, in the process of wet grinding, slowly add a small amount of iron oxide and strontium carbonate in small amounts, such as 10g of iron oxide and 10g of strontium carbonate;

[0036] (5) The next steps are consistent with the prior art, which are extrusion molding, drying, sintering, inspection and packaging; no mo...

Embodiment 2

[0038] A method for making a ferrite permanent magnet material, comprising the following steps:

[0039] (1) Calcined material ingredients: 10000g of iron oxide, 40g of light calcium carbonate, 20g of kaolin;

[0040] (2) After the batching is completed, use ball milling equipment to pulverize and mix the prepared calcined material by wet milling; in the process of wet milling, slowly add 30 g of sodium hydroxide in small amounts; slowly grind until the harmful substance silicon ions Divide;

[0041] (3) pre-burning the material obtained in step (2), and the pre-burning temperature is controlled at 1270 ° C;

[0042] (4) Then carry out 2 times of wet grinding, at this time, in the process of wet grinding, slowly add 10 g of iron oxide and 30 g of strontium carbonate;

[0043] (5) The next steps are consistent with the prior art, which are extrusion molding, drying, sintering, inspection and packaging; no more details are given here.

Embodiment 3

[0045] A method for making a ferrite permanent magnet material, comprising the following steps:

[0046] (1) Calcined material ingredients: iron oxide 10000g, light calcium carbonate 60g, kaolin 40g;

[0047] (2) After the batching is completed, use ball milling equipment to pulverize and mix the prepared calcined material by wet grinding; in the process of wet grinding, slowly add 40 g of sodium hydroxide in small amounts; slowly grind until the harmful substance silicon ions Divide;

[0048] (3) pre-burning the material obtained in step (2), and the pre-burning temperature is controlled at 1270 ° C;

[0049] (4) Then carry out 2 times of wet grinding, at this time, in the process of wet grinding, slowly add 10 g of iron oxide and 40 g of strontium carbonate;

[0050] (5) The next steps are consistent with the prior art, which are extrusion molding, drying, sintering, inspection and packaging; no more details are given here.

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Abstract

The invention relates to a method for manufacturing a ferrite permanent magnet material, which belongs to the technical field of the manufacturing of high-performance ferrite permanent magnet material. The method comprises the following steps: crushing and mixing a prepared pre-sintered material in ball milling equipment, wherein the crushing mode is wet milling; and adding sodium hydroxide in an amount which is 0.1 to 2.0 percent based on the weight of the pre-sintered material in a wet milling process. In the method of the invention, the sodium hydroxide is added in the wet milling process to remove harmful silicon ions effectively and quickly, so the ferrite permanent magnet material manufactured by the method has the characteristics of uniform and consistent surface residual magnetism and no waveform distortion.

Description

technical field [0001] The invention relates to a method for manufacturing ferrite permanent magnet materials, belonging to the technical field of manufacturing high-performance ferrite permanent magnet materials. Background technique [0002] At present, in terms of ferrite research, production technology, and enterprise scale, Japan's TDK, FDK, and Hitachi, Germany's Siemens, VAC, and U.S. Stealword are in the forefront of the world. Great development, for example, the output of permanent magnet ferrite increased from 9 tons in 1988 to 460,000 tons in 2008, but the production technology and equipment of Chinese enterprises are relatively backward, most of the products are concentrated in low-end products, and the stability and consistency of products Not high, lack of competitiveness in the international market. [0003] The Chinese Invention Patent No. 200610043376.6 discloses a method for preparing a ferrite permanent magnet material. The steps include: adding a binder...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 马武明
Owner 安吉县科声磁性器材有限公司
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