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Alloy micropowder electromagnetic wave absorbent and preparation method thereof

An electromagnetic wave and absorber technology, which is applied in the field of alloy micropowder electromagnetic wave absorber and its preparation, can solve the problem of high cost, achieve high flake degree, save cost, and improve microwave permeability and magnetic loss.

Inactive Publication Date: 2013-06-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the current method of preparing raw materials is generally to prepare granular raw materials through the aerosol method of pre-smelted materials, or to prepare thin strips through rapid extraction, which is relatively expensive.

Method used

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  • Alloy micropowder electromagnetic wave absorbent and preparation method thereof
  • Alloy micropowder electromagnetic wave absorbent and preparation method thereof
  • Alloy micropowder electromagnetic wave absorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] S11. Weigh the pure iron block, polycrystalline silicon and pure chromium block according to the mole percentage of each component of the Fe-Si-Cr alloy being Fe:Si:Cr=77.3:21.5:1.2.

[0036] S12. Put the raw material weighed in S11 into the electric arc heating furnace with argon protection atmosphere, melt it to obtain molten metal liquid, and finally cast it into an ingot.

[0037] S13, mechanically crushing the ingot obtained in S12 to obtain fine particles with a particle size of 180 μm-220 μm.

[0038] S14, putting the microfine particles after S13 mechanically crushing into a planetary ball mill for wet ball milling, the balls, material and absolute ethanol are formulated into a mixture according to a weight ratio of 250:1:25 and put into a ball mill tank for ball milling, Zirconium balls with a diameter of 15mm were selected as the grinding balls, the milling speed was 200r / min, and the milling time was 48 hours.

[0039] S15 , drying the material taken out aft...

Embodiment 2

[0042] S21. According to the mole percentage of each component of the Fe-Si-Cr alloy is Fe:Si:Cr=76.5:21.5:2, weigh the pure iron block, polysilicon and pure chromium block.

[0043] S22. Put the raw material weighed in S21 into the electric arc heating furnace with argon protection atmosphere, melt it to obtain molten metal liquid, and finally cast it into an ingot.

[0044] S23. Mechanically crushing the ingot obtained in S22 to obtain fine particles with a particle size of 180 μm-220 μm.

[0045] S24, putting the microfine particles after S23 mechanical crushing into a planetary ball mill for wet ball milling, the balls, material and absolute ethanol are formulated into a mixture according to a weight ratio of 250:1:25 and put into a ball mill tank for ball milling, Zirconium balls with a diameter of 15mm were selected as the grinding balls, the milling speed was 200r / min, and the milling time was 48 hours.

[0046]S25 , drying the material taken out after the ball milling...

Embodiment 3

[0049] S31. According to the mole percentage of each component of the Fe-Si-Cr alloy is Fe:Si:Cr=75.5:21.5:3, weigh the pure iron block, polysilicon and pure chromium block.

[0050] S32. Put the raw material weighed in S31 into the electric arc heating furnace with argon protection atmosphere, melt it to obtain molten metal liquid, and finally cast it into an ingot.

[0051] S33. Mechanically crushing the ingot obtained in S32 to obtain fine particles with a particle size of 180 μm-220 μm.

[0052] S34, putting the microfine particles after S33 mechanical crushing into a planetary ball mill for wet ball milling, the balls, material and absolute ethanol are formulated into a mixture according to a weight ratio of 250:1:25 and put into a ball mill tank for ball milling, Zirconium balls with a diameter of 15mm were selected as the grinding balls, the milling speed was 200r / min, and the milling time was 48 hours.

[0053] S35 , drying the material taken out after the ball millin...

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Abstract

The invention relates to an alloy micropowder electromagnetic wave absorbent and a preparation method of the absorbent. The main ingredients of the alloy micropowder electromagnetic wave absorbent comprise Fe, Si and Cr. The prepared alloy micropowder electromagnetic wave absorbent has an excellent dynamic magnetic property, and the preparation method is simple in preparation process, low in equipment requirements, and suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic wave absorbing materials, in particular to an alloy micropowder electromagnetic wave absorber and a preparation method thereof. Background technique [0002] With the development of modern science and technology, the application of electronic and information technology has developed rapidly, and various modern electronic devices such as mobile phones have become popular rapidly, and people are using and relying on more and more information systems. The radiation and leaked electromagnetic waves of electronic equipment threaten human health and safety; information systems are transmitted by means of digital signals, which are easily interfered by electromagnetic waves and cause errors. It has been found that the electromagnetic wave interference generated by the radiated electromagnetic waves of electronic and information equipment can cause obvious medical and communication failures; one o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/34C22C33/02B22F9/04
Inventor 梁迪飞张先智杨宏伟田炜王昕陈良邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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