High-magnetism strontium ferrite, and preparation method and application thereof
A strontium ferrite, high magnetic technology, applied in the field of magnetic materials, can solve the problems that strontium ferrite needs to be improved, and achieve the goal of improving various magnetic properties, increasing density and magnetic strength, increasing density and various magnetic properties Effect
Active Publication Date: 2021-08-13
上海龙磁电子科技有限公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
When using 80.7-87.0% iron oxide red, 12.1-13.2% strontium carbonate, 0.5-1.2% calcium carbonate, 0.1-1.0% silicon powder as raw materials to prepare strontium ferrite, the obtained strontium ferrite the B r For 4200-4250Gs, H cb 4000-4020Oe, H cj For 4520-4580Oe and (BH) max 4.39-4.04MGOe, the magnetic properties of strontium ferrite still need to be improved
Method used
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Examples
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preparation example 1
[0063] A magnetic steel powder, the preparation steps of which are: mixing and ball milling 100kg of strontium ferrite I and 5kg of coupling agent, drying until the water content is lower than 5%, and sieving to obtain magnetic steel powder with a particle size of 6-7μm.
[0064] Among them, strontium ferrite I adopts strontium ferrite S41390; the coupling agent adopts silane coupling agent KH-560.
preparation example 2
[0066] A magnetic steel powder, the difference from Preparation Example 1 is that 100kg of strontium ferrite I and 7.5kg of coupling agent are mixed and ball milled, dried until the water content is lower than 5%, and sieved to obtain a particle size of 6-7 μm magnetic steel powder.
preparation example 3
[0068] A magnetic steel powder, the difference from Preparation Example 1 is that 100kg of strontium ferrite I and 10kg of coupling agent are mixed and ball-milled, dried until the water content is lower than 5%, and sieved to obtain a magnetic steel powder with a particle size of 6-7 μm. Magnetic steel powder.
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Abstract
The invention relates to the technical field of magnetic materials, and particularly discloses a high-magnetism strontium ferrite, and a preparation method and application thereof. The high-magnetism strontium ferrite is composed of, by weight, 9.5-10.5% of strontium carbonate; 1.5-2% of an additive; 20-25% of magnetic steel powder; and the balance of iron oxide red. The preparation method of the magnetic steel powder comprises the following steps: stirring and mixing the strontium ferrite I and the coupling agent in a weight ratio of 1: (0.05-0.1) to obtain a mixture, and carrying out ball milling, drying and sieving on the mixture to obtain the magnetic steel powder. The high-magnetism strontium ferrite disclosed by the invention has relatively high residual magnetism (Br), magnetic induction coercive force (Hcb), intrinsic coercive force (Hcj) and maximum magnetic energy product (BH) max, and has the advantages of high density and good magnetic performance.
Description
technical field [0001] This application relates to the technical field of magnetic materials, more specifically, it relates to a high magnetic strontium ferrite, its preparation method and application. Background technique [0002] Strontium ferrite, also known as strontium permanent magnet ferrite, is an important magnetic functional material in the electronic information industry. , seats, oil pumps, etc.), motors for electric tools, motors for fitness equipment, refrigerators, washing machines, BLDC motors and other fields. Remanence (B r ), magnetic coercive force (H cb ), intrinsic coercive force (H cj ) and maximum energy product (BH) max It is an important index to judge the performance of strontium ferrite. [0003] There are two important production processes for strontium ferrite, one is the production of ferrite pre-sintered material, and the other is the production of magnets made of pre-sintered material. In the process, a certain amount of additives need t...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C04B35/26C04B35/622H01F1/34H01F41/02
CPCC04B35/2675C04B35/622H01F41/0253H01F1/344C04B2235/3208C04B2235/3418C04B2235/6567C04B2235/405
Inventor 李忠雷
Owner 上海龙磁电子科技有限公司