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Al@MnO2 composite material and preparation method and application thereof

A composite material and reaction technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, and other chemical processes, to achieve the effects of less pollution, wider absorption frequency, and easier reaction control

Active Publication Date: 2019-09-24
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] But fortunately, the bands of the two are different. Generally, the microwave frequency is 2-18GHz, while the infrared band is 8-14μm, which makes it possible to study microwave-infrared compatible stealth materials.

Method used

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  • Al@MnO2 composite material and preparation method and application thereof
  • Al@MnO2 composite material and preparation method and application thereof
  • Al@MnO2 composite material and preparation method and application thereof

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Effect test

Embodiment 1

[0041] Al@MnO proposed by the present invention 2 The method steps of composite material preparation are as follows:

[0042] S1: Pretreatment of Al powder: Add 2g of flake Al powder into a three-necked flask, then add 150ml of acetone, and react at 20°C for 20h. After the reaction is finished, suction filter, wash, and vacuum dry to obtain Al powder with a pure surface. The conditions for vacuum drying are: vacuum degree 0.06MPa, temperature 50°C, time 20h;

[0043] S2: Al@MnO 2 Synthesis of composite materials: Weigh 0.3g of Al powder treated in S1, add 60ml of distilled water into the container, and mix 0.1g of KMnO 4 Slowly add to the container, when the purple color of the solution is completely faded, filter it immediately, wash it with distilled water and absolute ethanol for 4 times, and dry the washed product in vacuum to obtain Al@MnO 2 For the composite material, the vacuum drying conditions are: vacuum degree 0.06Mpa, temperature 50°C, time 20h, magnetic stirrin...

Embodiment 2

[0045] Al@MnO proposed by the present invention 2 The method steps of composite material preparation are as follows:

[0046] S1: Pretreatment of Al powder: Add 5 g of flake Al powder into a three-neck flask, then add 150 ml of acetone, and react at 20° C. for 24 hours. After the reaction is finished, suction filter, wash, and vacuum dry to obtain Al powder with a pure surface. The conditions for vacuum drying are: vacuum degree 0.07MPa, temperature 60°C, time 24h;

[0047] S2: Al@MnO 2 Synthesis of composite materials: Weigh 0.5g of Al powder treated in S1, add 60ml of distilled water into the container, and mix 0.2g of KMnO 4 Slowly add to the container, when the purple color of the solution is completely faded, filter it immediately, wash it with distilled water and absolute ethanol for 4 times, and dry the washed product in vacuum to obtain Al@MnO 2 For the composite material, the vacuum drying conditions are: vacuum degree 0.07Mpa, temperature 60°C, time 24h, magnetic st...

Embodiment 3

[0049] Al@MnO proposed by the present invention 2 The method steps of composite material preparation are as follows:

[0050] S1: Pretreatment of Al powder: Add 5 g of flake Al powder into a three-neck flask, then add 150 ml of acetone, and react at 22° C. for 24 hours. After the reaction is finished, suction filter, wash, and vacuum dry to obtain Al powder with a pure surface. The conditions for vacuum drying are: vacuum degree 0.07MPa, temperature 60°C, time 24h;

[0051] S2: Al@MnO 2 Synthesis of composite materials: Weigh 0.5g of Al powder treated in S1, add 60ml of distilled water into the container, and mix 0.3g of KMnO 4 Slowly add to the container, when the purple color of the solution is completely faded, filter it immediately, wash it with distilled water and absolute ethanol for 4 times, and dry the washed product in vacuum to obtain Al@MnO 2 For the composite material, the vacuum drying conditions are: vacuum degree 0.07MPa, temperature 60°C, time 24h, and magne...

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Abstract

The invention discloses an Al@MnO2 composite material and a preparation method and application thereof. The Al@MnO2 composite material is synthesized by using a simple one-step chemical method, and MnO2 nano particles are uniformly distributed on the surface of an Al sheet. The simple one-step hydrothermal method is adopted, no surfactants are added, and no complicated instruments are adopted, so that traditional metallic vapor, ball milling and others are avoided, small pollution and easy reaction control are achieved, and the preparation method is widely applied to industrial production. The microwave absorption parameters of the composite are tested through a vector network analyzer, the microwave reflection loss of the composite is calculated through a classical coaxial line theory, and the infrared stealth performance of the composite material is tested by using a dual-band emissivity measuring instrument; and it is shown by results that the Al@MnO2 composite microwave-absorbing material has excellent microwave absorption performance and infrared stealth performance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to Al@MnO 2 Composite materials, preparation methods and their applications. Background technique [0002] Both microwave and infrared radiation are electromagnetic waves, but they belong to different wave bands, so microwave and infrared radiation have different physical properties. The working principle of the radar detector is: the reflected wave generated by the surface of the target object is received by the radar. The working principle of the infrared detector is: the energy radiated by the target object itself is accepted by the detector. Because the detection principles of the two are completely opposite, the microwave and infrared radiation mechanisms are also different. Microwave stealth requires materials with high absorption and low reflection, while low infrared radiation requires materials with high reflection and low emission. Therefore, there are relat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C01G45/02B82Y30/00
CPCC09K3/00C01G45/02B82Y30/00C01P2002/72C01P2004/03C01P2004/04
Inventor 邢宏龙刘航王欢
Owner ANHUI UNIV OF SCI & TECH
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