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High-performance permanent magnetic ferrite and preparation method thereof

A permanent magnet ferrite, high-performance technology, applied in inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc. Low cost, increase product added value, and expand the effect of product application fields

Inactive Publication Date: 2022-03-25
贵州法拉第磁电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance indicators of the permanent magnet ferrite products prepared by the conventional formula process on the market are quite different from them, and cannot effectively meet the needs of the high-tech industry. Only high-priced rare earth NdFeB permanent magnet products can be used, resulting in the cost of use. higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. The formula process of high-performance permanent ferrite is as follows: taking the output of a single batch of equipment as the total amount of raw materials, take lanthanum cerium neodymium-iron-boron alloy ultra-fine magnetic powder 4-10 wt%, solid camphor 1.1-1.4 wt%, stearin Calcium acid 0.25-0.34 wt%, and the balance is strontium barium ferrite dry-pressed heterogeneous fine powder.

[0023] 2. The high-performance permanent magnet ferrite powder making process is: put the above-mentioned mixed material into the mixer at one time, control the speed of the mixer to 280 rpm, and the mixing time is 15 minutes, and then release it, using an inner spiral tube Feed the material to the powder dispersing machine at a uniform speed for powder dispersing, control the speed of the dispersing machine to 2900 rpm, disperse and release immediately, and transfer to the pressing area for 24 hours before entering the pressing process.

[0024] 3. The pressing process of high-pe...

Embodiment 2

[0031]1. The formula process of high-performance permanent ferrite is as follows: take the output of a single batch of equipment as the total amount of raw materials, take lanthanum cerium neodymium iron boron alloy ultrafine magnetic powder 6 ~ 14wt%, solid camphor 1.2 ~ 1.4wt%, stearic acid Calcium 0.26-0.33wt%, the rest is strontium barium ferrite dry pressed heterogeneous fine powder.

[0032] 2. The other processes and processes of the high-performance permanent ferrite are the same as in Example 1. After testing, the residual magnetism Br is 4525Gs, the intrinsic coercive force Hcj is 4163Oe, and the magnetic energy product BH(max) is 4.238MGO.

[0033] Conclusion: The performance index of this embodiment is good, and high-end applications of products in many industries can be realized.

Embodiment 3

[0035] 1. The formula process of high-performance permanent ferrite is as follows: taking the output of a single batch of equipment as the total amount of raw materials, take lanthanum cerium neodymium-iron-boron alloy ultra-fine magnetic powder 10-18wt%, solid camphor 1.3-1.6wt%, stearic acid Calcium 0.27-0.35wt%, the rest is strontium barium ferrite dry pressed heterogeneous fine powder.

[0036] 2. The other processes and processes of the high-performance permanent ferrite are the same as in Example 1. After testing, the residual magnetism Br is 4672Gs, the intrinsic coercive force Hcj is 4188Oe, and the magnetic energy product BH(max) is 4.273MGO.

[0037] Conclusion: The performance index of this embodiment is good, and high-end applications of products in many industries can be realized. However, due to the increase in the weight ratio and cost of the ultrafine magnetic powder of the lanthanum cerium neodymium iron boron alloy, the product's intrinsic coercive force Hcj a...

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Abstract

The invention relates to a high-performance permanent magnetic ferrite and a preparation method thereof. The high-performance permanent magnetic ferrite comprises the following components: 4-18 wt% of lanthanum-cerium-neodymium-iron-boron magnetic powder; 1.1 to 1.6 wt% of solid camphor; 0.25 to 0.35 wt% of calcium stearate; and the balance of strontium-barium ferrite dry-pressed anisotropic powder. The method has the beneficial effects that the product is high in magnetic performance and low in production cost, the application range of the product is expanded, and rare earth resources are saved. The preparation method of the product is simple and convenient in process, the prepared product is good in consistency and high in percent of pass, and the service life of the product can be effectively guaranteed.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a high-performance permanent magnet ferrite and a preparation method thereof. Background technique [0002] Permanent ferrite materials are functional materials that generate magnetic fields. With the rapid development of high-tech industries, higher and higher requirements are put forward for the performance indicators of permanent ferrite products. For drones, robots, industrial automation control equipment, office automation, instrumentation and other products, the performance indicators of the permanent magnet ferrite used are: remanence Br≥4000Gs, intrinsic coercive force Hcj≥4000(Oe) , Magnetic energy product BH (max) ≥ 4.0MGO. However, the performance indicators of the permanent magnet ferrite products prepared by the conventional formula process on the market are quite different from them, and cannot effectively meet the needs of the high-tech industry. Only high-price...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/622H01F1/10H01F41/00
CPCC04B35/2641C04B35/622H01F1/10H01F41/00C04B2235/3274C04B2235/3213C04B2235/3215C04B2235/3804C04B2235/96C04B2235/5436
Inventor 丁国栋曹江平
Owner 贵州法拉第磁电科技有限公司