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Composite wave-absorbing material with rare earth element-doped magnetic particles loaded on layered MXene

A composite wave-absorbing material and rare earth element technology, which is applied in the direction of electrical components, magnetic/electric field shielding, and carbides, can solve the problems of high density, narrow wave-absorbing frequency bandwidth, and single type, and achieve simple preparation methods and improved absorption Wave performance, absorption bandwidth, and high production efficiency

Active Publication Date: 2021-08-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of them use Fe, Ni, Co and their alloys as magnetic metal absorbing materials, with a single type and limited absorbing performance.
At the same time, magnetic absorbing materials such as Fe, Ni, and Co still have defects such as high density and narrow absorbing frequency bandwidth.

Method used

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  • Composite wave-absorbing material with rare earth element-doped magnetic particles loaded on layered MXene
  • Composite wave-absorbing material with rare earth element-doped magnetic particles loaded on layered MXene
  • Composite wave-absorbing material with rare earth element-doped magnetic particles loaded on layered MXene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Preparation of MXene: Prepare 20ml of 9M hydrochloric acid solution, pour it into a 50ml polypropylene bottle, add 1g of lithium fluoride and stir evenly. Weigh again 1g MAX phase (Ti 3 AlC 2 ) powder, slowly added to the mixed solution, stirred and reacted at 35°C for 48h. After the reaction is completed, wash with deionized water until neutral, stir in 150ml of water for 1h, cryogenically sonicate for 1h under nitrogen protection, and then centrifuge at a speed of 3500r / m for 1h, and take the upper liquid to freeze-dry to obtain layered MXene powder. looks like figure 1 shown.

[0086] Preparation of CoLa / MXene: Weigh 90 mg of the MXene powder obtained above, add it into a mixed solution of 5 ml water and 45 ml ethylene glycol, and stir in a conical flask for 15 min. Take 1.3gCoCl respectively 2 ·6H 2 O and 0.097g LaCl 3 ·6H 2 O was added to the above solution and stirred for 15 min, and then 1.2 g of NaOH was used to adjust the pH to make the solution reach a...

Embodiment 2

[0088] Preparation of MXene: prepare 40ml of 9M hydrochloric acid solution, pour it into a 50ml polypropylene bottle, add 2g of lithium fluoride and stir evenly. Weigh again 2g MAX phase (Ti 3 AlC 2 ) powder, slowly added to the mixed solution, stirred and reacted at 40°C for 48h. After the reaction was completed, wash with deionized water until neutral, stir in 200ml of water for 1h, cryogenically sonicate for 1.5h under nitrogen protection, then centrifuge at 4000r / m for 1h, take the upper liquid and freeze-dry to obtain layered MXene powder.

[0089]Preparation of FeLa / MXene: Weigh 90 mg of the MXene powder obtained above, add it into a mixed solution of 5 ml water and 45 ml ethylene glycol, and stir in a conical flask for 15 min. Take 1.14gFeCl respectively 2 4H 2 O and 0.097g LaCl 3 ·6H 2 O was added to the above solution and stirred for 15 min, then 1.2 g of NaOH was used to adjust the pH to make the solution highly alkaline, and then 4 ml of hydrazine hydrate was ...

Embodiment 3

[0091] Preparation of MXene: Prepare 20ml of 9M hydrochloric acid solution, pour it into a 50ml polypropylene bottle, add 1g of lithium fluoride and stir evenly. Weigh again 1g MAX phase (Ti 3 AlC 2 ) powder, slowly added to the mixed solution, stirred and reacted at 35°C for 24h. After the reaction was completed, wash with deionized water until neutral, stir in 150ml of water for 1h, cryogenically sonicate for 1h under nitrogen protection, then centrifuge at 3500r / m for 1.5h, take the upper liquid and freeze-dry to obtain layered MXene powder.

[0092] Preparation of CoLa / MXene: Weigh 90 mg of the MXene powder obtained above, add to a mixed solution of 10 ml of water and 40 ml of ethylene glycol, and stir in a conical flask for 15 min. Take 0.65gCoCl respectively 2 ·6H 2 O and 0.048g LaCl 3 ·6H 2 O was added to the above solution and stirred for 15 minutes, and then 1 g of NaOH was used to adjust the pH, so that the solution reached a strong alkalinity, and then 2.5 ml ...

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Abstract

The invention provides a composite wave-absorbing material with rare earth element-doped magnetic particles loaded on layered MXene. The composite wave-absorbing material is prepared from a rare earth element-containing compound, a magnetic element-containing compound and an MAX phase. The composite wave-absorbing material is endowed with a wider wave-absorbing frequency band and more excellent wave-absorbing performance through doping of the rare earth element. Meanwhile, due to the introduction of rare earth element, the composite wave-absorbing material has relatively low density. The preparation method of the composite wave-absorbing material is simple, the preparation process is safe and free of toxic and harmful substances, and the composite wave-absorbing material has wide application prospects.

Description

technical field [0001] The invention relates to the field of composite wave-absorbing materials, in particular to a wave-absorbing material composed of magnetic particles doped with rare earth elements and layered MXene and a preparation method thereof. Background technique [0002] Absorbing material is a type of material that can absorb or greatly reduce the electromagnetic wave energy received by its surface, thereby reducing electromagnetic wave interference. The design should meet the impedance matching and attenuation conditions, reduce the reflection of electromagnetic waves on the surface of the material, and enhance absorption. The use of wave-absorbing materials on aircraft, missiles, tanks, ships and other weapons and military equipment can absorb reconnaissance waves, attenuate reflected signals, make it stealthy, break through the enemy's radar defense zone, and reduce the weapon system's exposure to infrared-guided missiles and Laser weapon attack, improve nati...

Claims

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Application Information

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IPC IPC(8): H05K9/00H01Q17/00C01B32/921
CPCH05K9/0088H01Q17/008C01B32/921C01P2002/20C01P2004/03C01P2006/40
Inventor 柴春鹏赵佳姚艳青王姗
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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