High-performance permanent magnet ferrite material and preparing method thereof

A permanent magnet ferrite, high-performance technology, applied in the field of magnetic functional material preparation, can solve the problems of high cost, complicated preparation process, unfavorable industrial production, etc., to achieve the effect of improving efficiency, reducing sintering temperature, and avoiding difficulties in forming magnetic parts

Active Publication Date: 2014-08-06
合肥领远新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above preparation conditions, although high intrinsic coercive force, residual magnetization and squareness ratio are obtained, the cost is high and the preparation process is relatively complicated, which is not conducive to industrial production.

Method used

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  • High-performance permanent magnet ferrite material and preparing method thereof
  • High-performance permanent magnet ferrite material and preparing method thereof
  • High-performance permanent magnet ferrite material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the chemical structure formula Sr 1-x Ba x o · n Fe (12-y) / n R y / n o 3 ( x =0.0, n =6.0, y =0.2, R is Cr) composition requirements, using industrially produced iron red (purity of 99.5%), strontium carbonate (purity of 99.05%) and industrially pure chromium trioxide as raw materials, one-time batching, and at the same time adding 0.2wt% CaCO 3 and 0.3wt% SiO 2 As a primary additive, mix with water and steel balls according to the weight ratio of material: water: ball = 1:1.5:15, and perform a ball mill for 2 hours to obtain a mixture with an average particle size of suspended particles of 1.25 μm.

[0032] After the mixed material is filtered, dried and granulated, it is pre-fired at 1290° C. and kept for 3 hours to prepare the M-type permanent magnet ferrite pre-fired material.

[0033] Then in the calcined powder obtained after crushing and sieving, add secondary additives, the addition of each component of the additive and the calcined powder ...

Embodiment 2

[0038] According to the chemical structure formula Sr 1-x Ba x o · n Fe (12-y) / n R y / n o 3 ( x =0.0, n =6.0, y =0.25, R is Cr) composition requirements, using industrially produced iron red (purity of 99.5%), strontium carbonate (purity of 99.05%) and industrially pure chromium trioxide as raw materials, a batching is carried out, and at the same time adding 0.2wt% CaCO 3 and 0.3wt% SiO 2 As a primary additive, mix with water and steel balls according to the weight ratio of material: water: ball = 1:1.5:15, and perform a ball mill for 2 hours to obtain a mixture with an average particle size of suspended particles of 1.24 μm.

[0039] After the mixed material is filtered, dried and granulated, it is pre-fired at 1290° C. and kept for 3 hours to prepare the M-type permanent magnet ferrite pre-fired material.

[0040] Then in the calcined powder obtained after crushing and sieving, add secondary additives, the addition of each component of the additive and the calcine...

Embodiment 3

[0045] According to the chemical structure formula Sr 1-x Ba x o · n Fe (12-y) / n R y / n o 3 ( x =0.0, n =6.0, y=0.3, R 1 Cr=0.15, R 2 According to the composition requirements of Al=0.15), industrially produced iron red (purity is 99.5%), strontium carbonate (purity is 99.05%), industrial pure chromium sesquioxide and aluminum sesquioxide are used as raw materials for a batching, and Add 0.2wt% CaCO at the same time 3 and 0.3wt% SiO 2 As a primary additive, mix with water and steel balls according to the weight ratio of material: water: ball = 1:1.5:15, and perform a ball mill for 2 hours to obtain a mixture with an average particle size of suspended particles of 1.25 μm.

[0046] After the mixed material is filtered, dried and granulated, it is pre-fired at 1290° C. and kept for 3 hours to prepare the M-type permanent magnet ferrite pre-fired material.

[0047] Then in the calcined powder obtained after crushing and sieving, add secondary additives, the addition of...

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Abstract

The invention relates to a high-performance permanent magnet ferrite material and a preparing method thereof and belongs to the technical field of magnetic function material preparation. The invention adopts the technical scheme as follows: carrying out preparation according to a main phase molecular formula Sr1-xBaxO.nFe(12-y)/nRy/nO3, wherein x is not smaller than 0 and not bigger than 0.998, n is not smaller than 5.75 and not bigger than 6.15, y is bigger than 0 and not bigger than 0.6, R refers to Cr or Cr and Al, and the content of Cr and Al is smaller than or equal to 0.6 when R refers to Cr and Al; secondarily adding one or more than two of industrial-purity CeO2, Ga2O3 and MoO3. The rest magnetism Br value of the high-performance permanent magnet ferrite prepared by the method is larger than or equal to 390mT, the intrinsic coercivity Hcj value is larger than or equal to 346.1kA/m, and the magnetic energy product (BH)max value is larger than or equal to 28.7kJ/m<3>. The method has the advantages that the high-performance permanent magnet ferrite material with a high performance-to-cost ratio is prepared through the relatively cheap chromium or chromium and aluminum substituted combination additive without adding expensive rare earth and rare metal oxide.

Description

technical field [0001] The invention belongs to the technical field of magnetic functional material preparation, and in particular relates to a high-performance permanent magnet ferrite material and a preparation method thereof. Background technique [0002] M-type permanent magnet ferrite belongs to the hexagonal crystal system. It is used as an important permanent magnet because of its high uniaxial magnetic crystal anisotropy, superior cost performance, high Curie temperature and chemical stability. Materials and magnetic recording materials are widely used in various fields such as home appliances, computers, automobiles, and communications. [0003] In recent years, with the continuous improvement of product miniaturization, light weight, thinner and environmental protection and energy saving requirements, higher requirements have been put forward for the performance of permanent ferrite materials. Therefore, the exploration and development of high-performance permanen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 刘先松黄风吕法瑞高尚马玉启黄鑫冯双久张战军牛晓飞
Owner 合肥领远新材料科技有限公司
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