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Flattening method of magnetic metal powder

A magnetic metal powder, flattening technology, applied in the field of soft ferrite material preparation, can solve the problems of long ball milling time, low efficiency, impurities, etc., and achieve the effect of shortening the total ball milling time, improving the flattening rate and high efficiency

Active Publication Date: 2016-08-10
江门江益磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problems of the above-mentioned traditional ball milling method are: if the rotating speed of the ball mill is very slow, the milling time will be too long and the efficiency will be too low, and the long-term ball milling will introduce impurities, which is not conducive to improving the performance of the product; and if the rotating speed of the ball mill Too fast, and the metal flakes are easily broken into small pieces

Method used

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  • Flattening method of magnetic metal powder
  • Flattening method of magnetic metal powder

Examples

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Effect test

Embodiment 1

[0023] Please refer to figure 1 , figure 1 A flow chart of the flattening method for magnetic metal powder provided by an embodiment of the present invention, such as figure 1 As shown, the method for flattening the magnetic metal powder provided in this embodiment uses a ball milling device to sequentially perform two-stage ball milling on the magnetic metal powder, specifically including the following steps:

[0024] S1. Carry out the first-stage ball milling on the magnetic metal powder until most of the magnetic metal powder is in the shape of a round cake and the thickness is 3-5um; wherein, the rotational speed of the ball milling device is the first rotational speed, and the size of the grinding medium is 1-5um in diameter. 2mm;

[0025] S2. Perform second-stage ball milling on the magnetic metal powder until the magnetic metal powder becomes flakes and the flakes are broken; wherein, the speed of the ball milling device is the second speed, the second speed is smalle...

Embodiment 2

[0031] Please refer to figure 2 , figure 2 The flow chart of the flattening method of magnetic metal powder provided for another embodiment of the present invention, such as figure 2 As shown, the method for flattening the magnetic metal powder provided in this embodiment uses a ball milling device to sequentially perform three-stage ball milling on the magnetic metal powder, specifically including the following steps:

[0032] S1. Carry out the first-stage ball milling on the magnetic metal powder until most of the magnetic metal powder is in the shape of a round cake and the thickness is 3-5um; wherein, the speed of the ball milling device is the first speed (set as V1), and the grinding medium The size is 1~2mm in diameter;

[0033] S2. Perform second-stage ball milling on the magnetic metal powder; wherein, the rotational speed of the ball milling device is the second rotational speed (set as V2), the second rotational speed V2 is smaller than the first rotational spe...

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Abstract

The invention discloses a method for flattening magnetic metal powder. In the method, a ball milling device is used to sequentially carry out at least two stages of ball milling on the magnetic metal powder to make it flat; and the rotating speed of the ball milling device is reduced step by step, and the size of the grinding medium is gradually reduced. increase, which is conducive to improving the flattening rate of the magnetic metal powder. It has been verified that the final flattening rate of the magnetic metal powder prepared by this method can reach a ratio of length / thickness between 60 and 100; and the method efficiency High, so that the total time of ball milling is shortened.

Description

technical field [0001] The invention relates to the technical field of soft ferrite material preparation, in particular to a method for flattening magnetic metal powder. Background technique [0002] Electromagnetic interference (EMI) is the interference of effective electromagnetic signals by unwanted electromagnetic signals or noise generated by electronic equipment such as computers and mobile phones during use. With the increasing popularity of various electronic devices, TV networks, program-controlled switches, mobile communication machines, and office automation, electromagnetic interference has increasingly become a major environmental pollution that people worry about, and its impact on military and civilian electronic information is becoming more and more serious. , has caused great harm to the public environment and personal safety, as well as military confidentiality and security, and with the development of many active networks in the direction of miniaturizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04
Inventor 汪南东颜铄清李启凡董丽冯则坤
Owner 江门江益磁材有限公司