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Preparation method for rare earth permanent ferrite magnetic shoe and product

A permanent magnet ferrite, magnetic tile technology, applied in the direction of magnetic circuit, manufacture of motor generators, electrical components, etc., can solve the problems of uneven particle size, poor magnetic performance, affecting the quality of magnetic tiles, etc., to improve the degree of magnetic orientation, The effect of improving the magnetic properties

Active Publication Date: 2010-10-13
马鞍山市鑫洋永磁有限责任公司
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Problems solved by technology

And the composition of existing permanent magnet ferrite magnetic tile raw material is Fe 2 o 3 , SrCO 3 , CaCO 2 , SiO 2 、Al 2 o 3 , after mixing and sintering this kind of raw material, its magnetic properties are poor and cannot meet the above requirements well
At the same time, the existing production process makes the particle size obtained after grinding uneven, which directly affects the quality of the magnetic tile

Method used

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  • Preparation method for rare earth permanent ferrite magnetic shoe and product
  • Preparation method for rare earth permanent ferrite magnetic shoe and product

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Embodiment Construction

[0023] The preparation method of the present invention is specifically described below:

[0024] (1) Treatment of iron oxide scale: After the iron oxide scale is washed with water, it is dried in a rotary drying furnace, and the sundries are removed by magnetic separation:

[0025] (2) Grinding: Grind the treated iron oxide scale into iron oxide powder in a ball mill, the particle size of which is ≤5 μm; the ball mill is equipped with φ50mm, φ40mm, φ30mm steel balls, and the weight percentage is 3:5:3.

[0026] (3) Oxidation: Put the iron oxide powder into the externally heated rotary kiln for heating and oxidation. The content of iron is less than 0.2%;

[0027] (4) Primary ingredients: mix and stir ferric oxide, strontium carbonate and calcium carbonate, the mass percentages of which are 84.96-85.56%, 14.2-14.8%, 0.22-0.26%;

[0028] (5) Mixing: Put the mixed material into a ball mill for ball milling, so that it is evenly mixed, and the component segregation is less than ...

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Abstract

The invention discloses a preparation method for a permanent ferrite magnetic shoe containing a rare earth material and an organic material, and a product. The preparation method comprises the following steps of: treating an iron scale; grinding; oxidizing; primary dosing; mixing; preburning and palletizing; rough grinding; secondary dosing; ultra-fine grinding; slurry precipitation; pressing blanks; sintering; grinding; and warehousing. The preparation method of the invention has the characteristics that: the magnetic orientation degree of crystal grains is improved by adding calcium gluconate and improving a grinding method; and magnetic performance and magnetic characteristics thereof are improved by displacing the components of a conventional strontium ferrite permanent magnet material by adopting an additive mode of secondary dosing. The rare earth permanent ferrite magnetic shoe obtained by the preparation method has the characteristics of high residual magnetic flux density, high intrinsic coercive force and low intrinsic coercive force temperature coefficient.

Description

technical field [0001] The invention relates to the technical field of permanent magnet ferrite tiles for micromotors, in particular to a preparation method and products of permanent magnet ferrite tiles added with rare earth materials and organic materials. Background technique [0002] Permanent magnet ferrite tiles are mainly used in motors in industries such as automobiles, motorcycles, electric bicycles, household appliances, and fitness equipment. In terms of magnetic properties, on the one hand, the magnetic tile must meet the requirements of the motor for permanent magnets, and on the other hand, it must have a corresponding intrinsic coercive force to ensure that the magnet does not undergo irreversible demagnetization under the action of a strong demagnetizing field. Therefore, it is required that the magnetic tile not only has a high residual magnetic flux density, but also has a high intrinsic coercive force. And the composition of existing permanent magnet ferr...

Claims

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Application Information

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IPC IPC(8): H02K1/00H02K15/00C04B35/26C04B35/622
Inventor 杨连宏高习东李金阳
Owner 马鞍山市鑫洋永磁有限责任公司
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