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Composite microwave absorbing material prepared through three steps of reaction and preparation method

A composite absorbing material and reaction technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, other chemical processes, etc., can solve the problems of limited industrial utilization of materials, poor electromagnetic wave reflection loss, and different electromagnetic wave absorption frequency bands. Width and other issues, to achieve great practical application value, improve the effect of specific surface area

Active Publication Date: 2017-08-11
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its absorption frequency band for electromagnetic waves is not wide, which greatly limits the industrial utilization of this material
Secondly, although some researchers have compounded molybdenum disulfide and magnetic particles, there is no good impedance matching, resulting in poor reflection loss for electromagnetic waves.

Method used

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  • Composite microwave absorbing material prepared through three steps of reaction and preparation method
  • Composite microwave absorbing material prepared through three steps of reaction and preparation method
  • Composite microwave absorbing material prepared through three steps of reaction and preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0033] 1. Molybdenum disulfide (MoS 2 ) preparation;

[0034] Weigh 12g of thioacetamide and 9.68g of sodium molybdate and dissolve them in water, transfer them to a hydrothermal kettle, put them in an oven preheated to 200-245°C for 3-10 hours, then stop heating and naturally cool to room temperature. Open a kettle, wash, and freeze-dry to obtain a black solid powder.

[0035] 2.MoS 2 @Fe 3 o 4 preparation of

[0036] ① Pre-preparing a mixed solution of ethanol and deionized water, adding 0.5-1 g of the molybdenum disulfide powder prepared above to it, and stirring it ultrasonically.

[0037] ② Accurately weigh 0.02mol ferric chloride (anhydrous) and 0.01mol ferric chloride and dissolve them in deionized water.

[0038] ③Mix the above two solutions and stir in an oil bath less than 100°C for 30 minutes;

[0039] ④ Transfer the above solution to a hydrothermal reaction kettle, then quickly inject 2.5-3ml of concentrated ammonia water, seal the kettle, put it in an oven ...

Embodiment 1

[0043] Molybdenum disulfide (MoS 2 ) preparation;

[0044] Weigh 1.2g of thioacetamide, dissolve 0.9g of sodium molybdate in 60ml of deionized water, stir ultrasonically for 30min, transfer to a polystyrene-lined hydrothermal kettle, and put it in an oven preheated to 240°C for reaction 7 Hours, then stop heating and cool to room temperature naturally, open the kettle, wash, and freeze-dry to obtain a black solid powder.

Embodiment 2

[0046] MoS 2 @Fe 3 o 4 preparation of

[0047] ① Prepare a mixed solution of 30ml of ethanol and 30ml of deionized water, add 0.2g of molybdenum disulfide powder prepared above, and stir it ultrasonically for 30min.

[0048] ② Accurately weigh 0.35g of ferric chloride and 0.214g of ferric chloride and dissolve in 10ml of deionized water.

[0049] ③Mix the above two solutions and stir in an oil bath at 80°C for 30 minutes;

[0050] ④ Transfer the above solution to a hydrothermal reaction kettle, then quickly inject 3ml of 26% ammonia water, seal the kettle, put it in an oven at 110°C for 3 hours, cool it down to room temperature naturally, open the kettle, wash several times, and dry at 60°C Molybdenum disulfide supported by ferric oxide is obtained.

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Abstract

The invention relates to a composite microwave absorbing material prepared through three steps of reaction and a preparation method. Through the three steps of reaction, MoS2@Fe3O4@PANI nano-powder with a multi-layer structure is prepared. By the adoption of the composite microwave absorbing material prepared through the three steps of reaction, the problems are solved that when absorbing microwaves, a traditional single component is narrow in frequency band, poor in impedance matching and poor in electromagnetic-wave reflection loss. The characteristic preparation method not only provides a new preparation method of the composite microwave absorbing material but also provides a research thought of novel microwave absorbing materials, and according to the research thought, the specific surface area of the material is improved as much as possible so that electromagnetic waves can be reflected and refracted many times. Therefore, the composite microwave absorbing material prepared through the three steps of reaction and the preparation method have great scientific significance and have great actual application value in the aspect of electromagnetic-wave absorbing coating production.

Description

technical field [0001] The invention belongs to the technical field of composite materials and fine chemicals, and relates to a composite wave-absorbing material prepared through a three-step reaction and a preparation method thereof. Background technique [0002] With the widespread application of radar reconnaissance technology in the defense system, the use of stealth technology to avoid radar identification, positioning and tracking, and to improve the survivability of combat targets on the battlefield has increasingly become the focus of research in various countries. The stealth effect of shape design is better, but it is restricted by many conditions, so the research and application of stealth materials (coatings) has become the main direction of the development of stealth technology. [0003] Electromagnetic waves also have wave-particle duality, so people think that the focus of research on stealth materials is to enable electromagnetic waves to undergo multiple ref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08K9/12C08K3/22C08K3/30C08K7/00C09K3/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C08K3/22C08K3/30C08K7/00C08K9/12C08K2003/2275C08K2003/3009C08K2201/01C08K2201/011C09K3/00C08L79/02
Inventor 颜红侠张卫东齐暑华
Owner NORTHWESTERN POLYTECHNICAL UNIV
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