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High-entropy alloy/carbon black composite electromagnetic wave-absorbing material and preparation method thereof

A high-entropy alloy and composite electromagnetic technology, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of low loss and poor absorption capacity of conductance absorbers and dielectric absorbers, and achieve improved wave-absorbing performance and enhanced polarity. The effect of chemicalization and improving the electromagnetic absorption performance

Pending Publication Date: 2022-04-12
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetism of the magnetic absorber disappears at high temperature, the loss of the conductance absorber and the dielectric absorber is small, and the absorption capacity is poor, so it is necessary to develop a new type of absorbing material

Method used

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  • High-entropy alloy/carbon black composite electromagnetic wave-absorbing material and preparation method thereof
  • High-entropy alloy/carbon black composite electromagnetic wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment includes the following steps:

[0032] Step 1, premixing metal iron, metal nickel, metal chromium, metal aluminum and carbon black to obtain raw materials; the mass purity of the metal iron, metal nickel, metal chromium, metal aluminum and carbon black is greater than 99.5%; The particle size of the carbon black is less than 1 μm; the premixing is carried out in a mortar for 60min clockwise and counterclockwise alternating grinding, and the clockwise and counterclockwise alternating is carried out once every 5min;

[0033] Step 2, adding the raw materials, ethanol and stainless steel grinding balls obtained in step 1 into a ball milling jar for stirring, and then sealing the ball milling jar in a glove box filled with argon to obtain a sealed ball milling jar;

[0034] Step 3, installing the sealed ball milling jar obtained in step 2 on a high-energy ball mill for high-energy ball milling, and then opening the sealed ball milling jar after high-energy ball...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] Step 1, premixing metal iron, metal nickel, metal chromium, metal aluminum and carbon black to obtain raw materials; the mass purity of the metal iron, metal nickel, metal chromium, metal aluminum and carbon black is greater than 99.5%; The particle size of the carbon black is less than 1 μm; the premixing is carried out in a mortar for 30min clockwise and counterclockwise alternating grinding, and the clockwise and counterclockwise alternating is carried out once every 5min;

[0042] Step 2, adding the raw materials, ethanol and stainless steel grinding balls obtained in step 1 into a ball milling jar for stirring, and then sealing the ball milling jar in a glove box filled with argon to obtain a sealed ball milling jar;

[0043] Step 3, installing the sealed ball milling jar obtained in step 2 on a high-energy ball mill for high-energy ball milling, and then opening the sealed ball milling jar after high-energy ba...

Embodiment 3

[0049] This embodiment includes the following steps:

[0050] Step 1, premixing metal iron, metal nickel, metal chromium, metal aluminum and carbon black to obtain raw materials; the mass purity of the metal iron, metal nickel, metal chromium, metal aluminum and carbon black is greater than 99.5%; The particle size of the carbon black is less than 1 μm; the premixing is carried out in a mortar for 40min clockwise and counterclockwise alternating grinding, and the clockwise and counterclockwise alternating is carried out once every 5min;

[0051] Step 2, adding the raw materials, ethanol and stainless steel grinding balls obtained in step 1 into a ball milling jar for stirring, and then sealing the ball milling jar in a glove box filled with argon to obtain a sealed ball milling jar;

[0052] Step 3, installing the sealed ball milling jar obtained in step 2 on a high-energy ball mill for high-energy ball milling, and then opening the sealed ball milling jar after high-energy ba...

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Abstract

The invention discloses a high-entropy alloy / carbon black composite electromagnetic wave-absorbing material which is characterized in that the molecular formula of high-entropy alloy / carbon black is (FeNiCrAla) xCy, a is the molar ratio of Al to Fe, Ni and Cr, x and y are the mass fraction of FeNiCrAla and the mass fraction of C in the high-entropy alloy / carbon black respectively, Fe, Ni, Cr and Al form a quaternary high-entropy alloy which is compounded with carbon black, magnetic loss and electric loss are both achieved, and the high-entropy alloy / carbon black composite electromagnetic wave-absorbing material has a good electromagnetic wave-absorbing effect. The wave absorbing performance of the material is effectively improved, and the material has broadband efficient electromagnetic wave absorbing performance and is widely applied to various civil and military electromagnetic wave absorbing fields; in addition, the invention further provides a preparation method of the high-entropy alloy / carbon black composite electromagnetic wave-absorbing material, according to the method, metal iron, metal nickel, metal chromium, metal aluminum and carbon black are subjected to high-energy ball milling, alloying and compounding, and preparation of the high-entropy alloy / carbon black composite electromagnetic wave-absorbing material is achieved.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloy composite materials, and in particular relates to a high-entropy alloy / carbon black composite electromagnetic wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of the electronics industry, more and more electromagnetic waves are flooding people's living space, causing a large amount of electromagnetic wave pollution, and electromagnetic pollution has become the fourth largest pollution after air pollution, water pollution, and noise pollution. Electromagnetic wave pollution is not only detrimental to the normal operation of electronic equipment, but also detrimental to human physical and mental health. Electromagnetic absorbing materials can absorb electromagnetic wave pollution in the surrounding environment, so that people can avoid the harm of electromagnetic waves. Therefore, high-efficiency absorbing materials have al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/12B22F9/04C22C30/00H05K9/00
Inventor 张蔚冉张于胜潘晓龙徐俊杰孙国栋
Owner 西安稀有金属材料研究院有限公司
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