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High-magnetic-loss and wideband FeCo electromagnetic wave-absorbing material and preparation method thereof

An electromagnetic absorption and broadband technology, applied in magnetic/electric field shielding, nanotechnology for materials and surface science, electrical components, etc., can solve problems such as weak magnetic loss, high mass filling rate, and use restrictions, and achieve enhanced Magnetic loss capability, simple process flow, enhanced magnetic loss and electromagnetic absorption performance effects

Inactive Publication Date: 2018-09-21
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with magnetic metals, the use of ferrite is greatly limited due to its weak magnetic loss and high mass filling rate

Method used

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  • High-magnetic-loss and wideband FeCo electromagnetic wave-absorbing material and preparation method thereof
  • High-magnetic-loss and wideband FeCo electromagnetic wave-absorbing material and preparation method thereof
  • High-magnetic-loss and wideband FeCo electromagnetic wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of FeCo alloy wave-absorbing material comprises the steps:

[0019] Step 1, weigh 5mmol of ferrous chloride and 2.1mmol of cobalt acetate and place them in a three-necked flask, add 30mL of distilled water and 10mL of ethanol into the beaker to obtain a mixed solution, and perform ultrasonic treatment on the mixed solution for 20 minutes;

[0020] Step 2, subsequently, add 1 mL of ammonia water to the mixed solution treated in step 1, and simultaneously add 20 mmmoL sodium borohydride rapidly to the mixed solution, wherein the mass percentage of ammonia water is 75%;

[0021] Step 3, mechanically stirring the solution treated in step 2 for 10 minutes, and then transferring it to an autoclave for solvothermal reaction, the reaction temperature is 100° C., and the time is 4 hours;

[0022] Step 4. After the solvothermal reaction is over, cool the temperature to room temperature, and then wash it with absolute ethanol for 5 times. After cleaning, int...

Embodiment 2

[0024] A preparation method of a FeCo alloy wave-absorbing material with high magnetic loss and broadband wave-absorbing performance, comprising the steps of:

[0025] Step 1, weigh 5mmol of ferrous chloride and 5mmol of cobalt acetate and place them in a three-necked flask, add 30mL of distilled water and 20mL of ethanol into the beaker to obtain a mixed solution, and perform ultrasonic treatment on the mixed solution for 20 minutes;

[0026] Step 2, subsequently, add 2mL of ammonia water to the mixed solution after treatment in step 1, and then quickly add 20mmoL sodium borohydride to the mixed solution, wherein the mass percentage of ammonia water is 75%;

[0027] Step 3, mechanically stirring the solution treated in step 2 for 10 minutes, and then transferring it to an autoclave for solvothermal reaction, the reaction temperature is 120° C., and the time is 5 hours;

[0028] Step 4. After the solvothermal reaction is over, cool the temperature to room temperature, and then...

Embodiment 3

[0030] A preparation method of a FeCo alloy wave-absorbing material with high magnetic loss and broadband wave-absorbing performance, comprising the steps of:

[0031] Step 1, weigh 5mmol of ferrous chloride and 11.6mmol of cobalt acetate and place them in a three-necked flask, add 30mL of distilled water and 30mL of ethanol into the beaker to obtain a mixed solution, and perform ultrasonic treatment on the mixed solution for 30 minutes;

[0032] Step 2, under an argon protection environment, add 3mL of ammonia water to the mixed solution treated in step 1, and at the same time quickly add 20mmol of sodium borohydride to the mixed solution, wherein the mass percentage of ammonia water is 75%;

[0033] Step 3, the solution treated in step 2 was mechanically stirred for 10 minutes, and then transferred to a high-pressure reactor for solvothermal reaction. The reaction temperature was 150° C., and the time was 6 hours;

[0034] Step 4. After the solvothermal reaction is over, coo...

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Abstract

The invention belongs to the field of electromagnetic wave-absorbing materials and particularly relates to a high-magnetic-loss and wideband FeCo electromagnetic wave-absorbing material and a preparation method thereof. The preparation method comprises the steps of carrying out ultrasonic treatment on the raw materials of ferrous chloride and cobalt acetate in a mixed solution, and adding ammoniawater and a reducing agent, so as to generate solvothermal reaction, thus obtaining the FeCo electromagnetic wave-absorbing material. The preparation method has the advantages of short synthesis period, simple process flow and low cost; and the FeCo alloy wave-absorbing material prepared by virtue of the preparation method has high magnetic loss and wideband wave-absorbing performance.

Description

technical field [0001] The invention belongs to the field of electromagnetic wave-absorbing materials, in particular to a high magnetic loss, broadband FeCo electromagnetic wave-absorbing material and a preparation method thereof. Background technique [0002] The rapid development of science and technology has brought people into the era of electronic information technology. The excessive use of these electronic devices makes people live in an environment full of electromagnetic radiation and interference all the time (Adv. Mater, 28 (2018) 486-490). The research results show that electromagnetic interference is more and more harmful to the health of human beings, especially newborns and pregnant women. Therefore, the control of electromagnetic radiation pollution has reached an urgent point. In order to eliminate the negative effects of electromagnetic radiation and interference, researchers often use the strategy of preparing high-performance electromagnetic absorbers to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24H05K9/00B82Y40/00B82Y30/00
CPCB22F9/24B82Y30/00B82Y40/00H05K9/0081
Inventor 吴广磊贾梓睿冯爱玲王晓逍张文琪张娜赵修松
Owner QINGDAO UNIV
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