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Method for manufacturing sintered permanent ferrite powder

A technique for producing permanent ferrite and its manufacturing method, which is applied in the manufacture of sintered permanent ferrite materials and the manufacture of sintered permanent ferrite material powder, and can solve the problems of low production efficiency, energy consumption, large energy consumption, and water content of slurry To achieve the effect of high production efficiency, low energy consumption and good dispersion performance

Inactive Publication Date: 2008-06-25
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention also aims to provide a kind of slurry with uniform particle size, low energy consumption and high production efficiency for the defects of high water content, high energy consumption and low production efficiency in the wet material preparation process of the prior art. Manufacturing method of sintered permanent magnet ferrite material powder

Method used

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  • Method for manufacturing sintered permanent ferrite powder
  • Method for manufacturing sintered permanent ferrite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 80% Fe by weight 2 o 3 and 20% by weight of SrCO 3 Add the iron oxide and strontium carbonate weighed above to deionized water with a weight ratio of 0.8, mix for 3 hours and grind; the particle size of the mixture after grinding is less than 0.5 μm to 0.9 μm, and the slurry after grinding is in an oven at 150 ° C Heating at medium temperature for 24 hours, the water content of the concentrated solid is 0.1%; the above-mentioned concentrated solid is dispersed into fine particles by kneading, and the average particle size of the dispersed fine particles is measured as 10 μm by a Fisher sub-sieve particle size analyzer; the above-mentioned dispersed After the fine particles are added with 4% deionized water by weight, it is placed on a disc machine with an inclination angle of 20 degrees to form a ball under the rotation condition. The average particle diameter of the particles after granulation is 12mm; The particles were put into a rotary kiln and sintered at a...

Embodiment 2

[0037] Weigh 85% Fe by weight 2 o 3 and 15% by weight SrCO 3 Add the above-mentioned iron oxide and strontium carbonate weighed into deionized water with a weight ratio of 1:1.0 and mix for 4 hours and grind; the particle size of the mixture after grinding is 0.5 μm~0.9 μm μm, and the slurry after grinding Heated in an oven for 3 hours, and the water content of the concentrated solid was 2%; the above-mentioned concentrated solid was dispersed into fine particles by kneading, and the average particle size of the dispersed fine particles was measured as 8.0 μm by a Fisher sub-sieve particle size analyzer; the above-mentioned dispersed After the final fine grain is added its weight percent is 6% deionized water and is placed on a disc machine that an inclination angle is 30 degrees and becomes a ball under the rotating condition, and the average particle diameter of the particle after granulation is 9mm; The final particles were placed in a rotary kiln and sintered for 4 hours...

Embodiment 3

[0045] Weigh 87% Fe by weight 2 o 3 and 13% by weight BaCO 3 ; Add the above-mentioned weighed iron oxide and barium carbonate to distilled water with a weight ratio of 1:1.2, mix for 5 hours and grind; the particle size of the mixture after grinding is 0.5 μm to 0.9 μm μm, and the slurry after grinding is in an oven at 150 ° C Heating for 6 hours, the water content of the concentrated solid is 3%; the above-mentioned concentrated solid is pulverized and dispersed into fine particles by a pulverizer, and the average particle size of the dispersed fine particles is 5.0 μm measured by a Fisher sub-sieve particle size analyzer; the above-mentioned dispersed After the fine particles are added with 8% distilled water by weight, it is placed on a disk machine with an inclination angle of 50 degrees to form a ball under the rotation condition. The average particle diameter of the particles after granulation is 9mm; Put it into a rotary kiln and sinter for 5 hours at a temperature o...

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Abstract

The invention relates to a manufacturing method for sintering permanent magnetism ferrite powder. The method comprises following working procedures: A. Preparing materials; B. Mixing; C. Concentrating; D. Dispersing; E. Balling; F. Sintering. 1. The surface area of the powder produced with the manufacturing method of sintering permanent magnetism ferrite powder of the invention is increased, the dispensability is good, and the sintering permanent magnetism ferrite powder with high magnetism performance can be gained; 2. The granularity of powder which is produced with the manufacturing method of sintering permanent magnetism ferrite powder of the invention is well-proportioned, the consumption of the energy is small and the productivity effect is high; 3. The manufacturing method of powder which is produced with the manufacturing method of sintering permanent magnetism ferrite powder of the invention is simple, the operation is easy, no pollution is generated and the demand of mass production can be realized.

Description

technical field [0001] The invention relates to a method for manufacturing sintered permanent magnet ferrite material, in particular to a method for manufacturing sintered permanent magnet ferrite material powder; it belongs to the field of manufacturing magnetic materials. Background technique [0002] Sintered permanent magnet ferrite has the advantages of stable magnetic properties and strong demagnetization resistance; it is not easy to rust and does not need to be coated with a protective layer; it is hard and brittle and can be used for special tool processing and cutting; Suitable for automobiles, household appliances, industrial automation and other industries. The raw materials used to make sintered permanent magnet ferrite are iron oxide and strontium carbonate, especially iron oxide is more widely used. Oxide and strontium carbonate are made into powder and then shaped, dried and sintered to form sintered permanent magnet ferrite. [0003] In the prior art, iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/64H01F1/10
Inventor 吕舒宏杨正华
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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