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Preparation method for quickly quenched Fe-based metal grain with excellent wave absorbing property

A technology of base metal and magnetic metal, which is applied in the field of preparation of rapidly quenched Fe-based metal particle materials, can solve the problem of non-reflection absorption, etc., and achieve the effect of high practical value, correct principle and scientific means.

Inactive Publication Date: 2012-07-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although people have studied a lot of electromagnetic wave absorbing materials so far, they still cannot achieve non-reflection absorption. They can only improve the absorbing characteristics of materials as high as possible, so there is still a long way to go from practical applications.

Method used

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  • Preparation method for quickly quenched Fe-based metal grain with excellent wave absorbing property
  • Preparation method for quickly quenched Fe-based metal grain with excellent wave absorbing property
  • Preparation method for quickly quenched Fe-based metal grain with excellent wave absorbing property

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) The proportion of high-purity iron rod (99.9wt%) is 65-70%, the proportion of neodymium block (99.9wt%) is 2-4%, the proportion of analytical pure cobalt sheet (99.8wt%) is 16-20%, analytical pure The proportion of boron (99.8wt%) is 9-13%. Weigh the corresponding mass of metal according to the atomic percentage of each element in the alloy, make it into a magnetic metal alloy, and melt it in a high-frequency induction melting furnace to obtain an alloy ingot. , in order to ensure the uniformity of the ingredients, the melting was repeated twice.

[0024] Melting strips are smelted in a vacuum quenching furnace. Put the alloy ingot into the crucible, under the state of vacuuming and filling with argon, the alloy ingot is melted by the high-voltage arc of the tungsten-cerium electrode, and the molten solution is thrown into a thin strip by the high-speed rotating molybdenum wheel. Then the obtained ribbons were roughly crushed with a pulverizer, then finely ground w...

Embodiment 2

[0035] The method for preparing the Nd-Fe-Co-based magnetic metal particle material in Example 1 is the same, but the ultrasonic frequency is set to 3.0 GHz, and the ultrasonic time is 30 min. The prepared Nd-Fe-Co-based magnetic metal particles and the untreated Nd-Fe-Co-based magnetic metal particles (film thickness 1.5mm) were calculated and compared according to the line transmission theory through reflection loss (see figure 2 ) Obtained the conclusion consistent with embodiment 1.

Embodiment 3

[0037] The method for preparing the Nd-Fe-Co-based magnetic metal particle material is the same as that in Example 1, but the ultrasonic frequency is set to 3.5 GHz, and the ultrasonic time is 40 min. The prepared Nd-Fe-Co-based magnetic metal particles and the untreated Nd-Fe-Co-based magnetic metal particles (film thickness 1.5mm) were calculated and compared according to the line transmission theory through reflection loss (see image 3 ) Obtained the conclusion consistent with embodiment 1.

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Abstract

The invention provides a preparation method for a quickly quenched Fe-based metal grain with an excellent wave absorbing property. The preparation method comprises the following steps: weighting corresponding metals according to the mass percent of each metal element in an alloy; preparing the metals into a magnetic metal alloy; and after melting, melt-spinning and ball-milling the metal alloy, performing ultrasonic dispersing treatment, thereby obtaining a material of the Fe-based metal grain with the excellent wave absorbing property, wherein the material is capable of improving an interface property and is uniformly distributed. According to the preparation method, the cavitation principle and the mechanical effect of ultrasonic wave in liquid are utilized to obtain the uniformly distributed quickly quenched Fe-based metal grain material; and when the ultrasonic wave is transmitted in a piezoelectric material and a magnetostriction material, the wave absorbing property of the material of the Fe-based metal grain is increased due to the induced polarization and the induced magnetization caused by the mechanical effect of the ultrasonic wave. The preparation method provided by the invention is correct in principle and is scientific in measures. The material of the quickly quenched Fe-based metal grain with the excellent wave absorbing property prepared according to the preparation method is high in practical value and wide in application prospect.

Description

technical field [0001] The invention relates to a metal particle material with wave-absorbing properties, especially a method for preparing a fast-quenched Fe-based metal particle material with good wave-absorbing properties. Background technique [0002] With the development of modern science and technology, the impact of electromagnetic radiation on the environment is increasing. At airports, airplane flights are delayed due to electromagnetic wave interference; in hospitals, mobile phones often interfere with the normal work of various electronic medical instruments; in increasingly important stealth and electromagnetic compatibility (EMC) technologies, the role and status of electromagnetic wave absorbing materials It also appears very prominent, and has become a magic weapon and "secret weapon" for electronic countermeasures in modern military affairs. Therefore, controlling electromagnetic pollution and finding a material with excellent wave-absorbing properties have ...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22D11/06
Inventor 谢国治宦峰郭稷宋晓龙
Owner HOHAI UNIV
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