Preparation method of high-performance permanent magnet ferrite magnet and magnet

A permanent magnet ferrite, high-performance technology, applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc., can solve problems such as difficult to meet performance requirements, avoid molding difficulties, promote solid-state reactions, Effect of reducing milling time

Inactive Publication Date: 2017-11-24
MAANSHAN GAOKE MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the magnetic properties of the existing strontium ferrite materials are difficult to meet the performance requirements, the present invention provides a method for preparing a high-performance permanent ferrite magnet. By optimizing the production process of strontium ferrite, the remanence of the magnet is improved. Br and intrinsic coercive force make the magnetic properties of the magnet meet the performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the high-performance permanent ferrite magnet of the present invention comprises the following specific steps:

[0032] Step S101, mixing process: pre-sintering the strontium ferrite material SrO 6 (Fe 2 O 3 ) and La-Ca-Sr-Co ferrite pre-sintered material (La 0.6 Ca 0.4-x Sr x O n (Fe 1-y Co y ) 2 O 3 , 0.1≤x≤0.4, 0.2≤y≤0.3, 5.0≤n≤6.0) are mixed according to the weight ratio of 1:2.3, and added including CaCO 3 , SiO 2 , B 3 BO 3 , La 2 O 3 , Co 2 O 3 Substance powder, of which: 0.1 wt% CaCO 3 , 0.06wt% SiO 2 , 0.06wt% B 3 BO 3 , 0.5wt% La 2 O 3 , 0.25wt%Co 2 O 3 , and adding 0.3wt% calcium gluconate inorganic dispersant;

[0033] Step S102, grinding process: mix the strontium ferrite pre-sintered material with the La-Ca-Sr-Co ferrite pre-sintered material and then carry out slurry grinding, the grinding time is 16 hours, and the slurry particle size is controlled at 0.71 μm;

[0034] Step S103, pressing the green body ...

Embodiment 2

[0038] The preparation method of the high-performance permanent ferrite magnet of the present invention comprises the following specific steps:

[0039] Step S101, mixing process: pre-sintering the strontium ferrite material SrO 6 (Fe 2 O 3 ) and La-Ca-Sr-Co ferrite pre-sintered material (La 0.6 Ca 0.4-x Sr x O n (Fe 1-y Co y ) 2 O 3 , 0.1≤x≤0.4, 0.2≤y≤0.3, 5.0≤n≤6.0) are mixed in a weight ratio of 1:1.5, and added including CaCO 3 , SiO 2 , B 3 BO 3 , La 2 O 3 , Co 2 O 3 Substance powder, of which: 0.1 wt% CaCO 3 , 0.08wt% SiO 2 , 0.08wt% B 3 BO 3 , 0.8wt% La 2 O 3 , 0.4wt%Co 2 O 3 , and adding 0.35wt% calcium gluconate inorganic dispersant;

[0040] Step S102, grinding process: mixing the strontium ferrite pre-sintered material with the La-Ca-Sr-Co ferrite pre-sintered material and then grinding the slurry, the grinding time is 18 hours, and the slurry particle size is controlled at 0.66 μm;

[0041] Step S103, pressing the green body process: the sl...

Embodiment 3

[0045] The preparation method of the high-performance permanent ferrite magnet of the present invention comprises the following specific steps:

[0046] Step S101, mixing process: pre-sintering the strontium ferrite material SrO 6 (Fe 2 O 3 ) and La-Ca-Sr-Co ferrite pre-sintered material (La 0.6 Ca 0.4-x Sr x O n (Fe 1-y Co y ) 2 O 3 , 0.1≤x≤0.4, 0.2≤y≤0.3, 5.0≤n≤6.0) are mixed in a weight ratio of 1:1, and added including CaCO 3 , SiO 2 , B 3 BO 3 , La 2 O 3 , Co 2 O 3 Substance powder, of which: 0.1 wt% CaCO 3 , 0.1wt% SiO 2 , 0.1wt% B 3 BO 3 , 0.6wt% La 2 O 3 , 0.5wt%Co 2 O 3 , and adding 0.4wt% calcium gluconate inorganic dispersant;

[0047] Step S102, grinding process: mixing the strontium ferrite pre-sintered material with the La-Ca-Sr-Co ferrite pre-sintered material and then grinding the slurry, the grinding time is 16 hours, and the slurry particle size is controlled at 0.7 μm, During wet forming, if there are too many ultrafine powders, ther...

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Abstract

The invention discloses a preparation method of a high-performance permanent magnet ferrite magnet and the magnet, belonging to the technical field of magnetic materials. The method comprises the steps of mixing and grinding a strontium ferrite pre-sintered material and an La-Ca-Sr-Co ferrite pre-sintered material in a certain weight proportion, wherein the La-Ca-Sr-Co ferrite material is prepared from the following components: La0.6Ca0.4-xSrxOn (Fe1-yCoy)2O3, wherein the x is more than or equal to 0.1 and is less than or equal to 0.4, the y is more than or equal to 0.2 and is less than or equal to 0.3, the n is more than or equal to 5.0 and is less than or equal to 6.0, the strontium ferrite material is prepared from the component of SrO.6(Fe2O3). When the strontium ferrite pre-sintered material is mixed with the La-Ca-Sr-Co ferrite pre-sintered material, the minimum remanence Br of the prepared permanent magnet ferrite is 418.7mT, and the maximum is 429.1mT; the minimum intrinsic coercivity is 350.3kA/m, and the maximum is 388.6kA/m, which fully meets the requirements of current use: the remanence Br is 415mT to 430mT, and the intrinsic coercivity is 350kA/m to 380kA/m.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, and more particularly, relates to a preparation method and a magnet of a high-performance permanent magnet ferrite magnet. Background technique [0002] With the rapid development of my country's economy, the output and output value of permanent magnet ferrite magnets have increased year by year, and the annual growth rate is conservatively estimated to be about 10%. The permanent magnet ferrite industry has ushered in a broader development prospect. It is developing in the direction of energy saving, light weight, small size and high efficiency, so the permanent magnet material ferrite magnet must also develop in the direction of high performance in order to keep up with the pace of modern development. At present, the method to improve the high performance of permanent ferrite magnets is to use ion substitution technology, adding a primary additive Al in the production of high-performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622H01F1/10H01F41/02
CPCC04B35/2633C04B35/2641C04B35/622C04B2235/3208C04B2235/3213C04B2235/3227C04B2235/3274C04B2235/3275H01F1/10H01F41/0253H01F41/0266
Inventor 韦承义付伟
Owner MAANSHAN GAOKE MAGNETIC MATERIAL
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