Infrared-radar compatible stealth material based on YAG-aluminum oxide nanofiber membrane as well as preparation method and application of infrared-radar compatible stealth material

A nanofiber and nanofiber layer technology, applied in the field of invisible materials, can solve the problems of poor stability and invisibility, achieve the effects of reducing infrared radiation rate, improving infrared reflection performance, and broad application prospects

Active Publication Date: 2022-04-01
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of infrared-radar compatible stealth material based on YAG-alumina nanofiber film and its preparation method and application, which is used for existing infrared The problem of radar compatibility with stealth materials The problem of poor stealth effect and poor stability

Method used

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  • Infrared-radar compatible stealth material based on YAG-aluminum oxide nanofiber membrane as well as preparation method and application of infrared-radar compatible stealth material
  • Infrared-radar compatible stealth material based on YAG-aluminum oxide nanofiber membrane as well as preparation method and application of infrared-radar compatible stealth material
  • Infrared-radar compatible stealth material based on YAG-aluminum oxide nanofiber membrane as well as preparation method and application of infrared-radar compatible stealth material

Examples

Experimental program
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Effect test

preparation example Construction

[0031] a kind of Fe 3 o 4 Coated YAG-Al 2 o 3 Nano fiber material, its preparation method comprises the following steps:

[0032] S1: YAG-Al 2 o 3 Preparation of precursor sol:

[0033] Prepare Y(NO 3 ) 3 , YCl 3 Mix the aqueous solution and adjust the pH to 4-5, then add aluminum and aluminum isopropoxide in a molar ratio of (5-8):1 and stir at 90-100°C for 1-5h, mix well to obtain Al 2 o 3 YAG-Al with a content of 10-30wt% 2 o 3 Precursor sol;

[0034] S2: YAG-Al 2 o 3 Preparation of nanofiber layer:

[0035]S2-1: YAG-Al 2 o 3 The precursor sol and the spinning aid are stirred at room temperature for 4-24 hours to make them evenly mixed, and then placed at 60-80°C for 1-2 hours to concentrate to obtain YAG-Al 2 o 3 Precursor spinning solution;

[0036] Wherein, the spinning aid is at least one of PVA, PVP or PEO, and the molecular weight is 8-1.3 million; YAG-Al 2 o 3 The mass ratio of precursor sol and spinning aid is (1-3): 1;

[0037] S2-2: YAG-Al ...

Embodiment 1

[0045] a kind of Fe 3 o 4 Coated YAG-Al 2 o 3 Nano fiber material, its preparation method comprises the following steps:

[0046] S1: YAG-Al 2 o 3 Preparation of precursor sol:

[0047] Y(NO with a molar ratio of 1:2 3 ) 3 ·6H 2 O and YCl 3 ·6H 2 Add O to deionized water, add acetic acid to adjust the pH to 4, then add aluminum powder and aluminum isopropoxide with a molar ratio of 5:1, and stir at 90°C for 1 hour, mix well to obtain Al 2 o 3 10wt% YAG-Al 2 o 3 Precursor sol;

[0048] S2: YAG-Al 2 o 3 Preparation of nanofiber layer:

[0049] S2-1: YAG-Al 2 o 3 The precursor sol and the spinning aid PVA with a molecular weight of 80,000 were stirred at room temperature for 4 hours at a mass ratio of 1:1 to make them evenly mixed, and then placed in a muffle furnace for 1 hour at 60°C for heating pretreatment , to obtain concentrated YAG-Al 2 o 3 Precursor spinning solution;

[0050] S2-2: YAG-Al 2 o 3 The precursor spinning solution is placed in a high-...

Embodiment 2

[0058] a kind of Fe 3 o 4 Coated YAG-Al 2 o 3 Nano fiber material, its preparation method comprises the following steps:

[0059] S1: YAG-Al 2 o 3 Preparation of precursor sol:

[0060] Y(NO with a molar ratio of 1:2 3 ) 3 ·6H 2 O and YCl 3 ·6H 2 Add O to deionized water, add acetic acid to adjust the pH to 4, then add aluminum powder and aluminum isopropoxide at a molar ratio of 5:1, and stir at 95°C for 2 hours to mix evenly to obtain Al 2 o 3 20wt% YAG-Al 2 o 3 Precursor sol;

[0061] S2: YAG-Al 2 o 3 Preparation of nanofiber layer:

[0062] S2-1: YAG-Al 2 o 3 The precursor sol and the spinning aid PVA with a molecular weight of 80,000 were stirred at room temperature for 4 hours at a mass ratio of 2:1 to make them evenly mixed, and then placed in a muffle furnace for 1.5 hours at 70°C for heating Pretreatment to obtain concentrated YAG-Al 2 o 3 Precursor spinning solution;

[0063] S2-2: YAG-Al 2 o 3 The precursor spinning solution is placed in a h...

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Abstract

The invention relates to an infrared-radar compatible stealth material based on a YAG-aluminum oxide nanofiber membrane and a preparation method and application of the infrared-radar compatible stealth material based on the YAG-aluminum oxide nanofiber membrane, the preparation method comprises the steps that Fe3O4, silicone rubber and a curing agent are mixed to obtain precursor mixed glue, then a YAG-Al2O3 nanofiber layer is coated with the precursor mixed glue, and a Fe3O4-coated YAG-Al2O3 nanofiber material is obtained. Compared with the prior art, the YAG-Al2O3 nanofiber membrane is used as a main bearing framework, infrared stealth is achieved through the fiber membrane material and structural regulation, radar stealth is further achieved by externally coating the radar wave absorbing material Fe3O4, the YAG-Al2O3 nanofiber membrane and the radar wave absorbing material Fe3O4 are connected with each other, and the problem that radar-infrared stealth materials are incompatible is solved.

Description

technical field [0001] The invention belongs to the technical field of invisible materials, and relates to a YAG-Al based 2 o 3 Infrared-radar compatible stealth material and preparation method of nanofibrous film. Background technique [0002] As my country's comprehensive strength continues to increase, military strength and national defense capabilities are increasingly valued by the country. In addition, the rapid development of radar detection system and infrared detection technology has greatly promoted the ability of defense systems in various countries to search, track and attack targets. In such a complex and changeable battlefield environment, how to keep the position and type of military targets such as aircraft and tanks out of monitoring has become the focus of research by various military powers. [0003] Radar stealth reduces the energy of radar echoes by attenuating the energy of incident electromagnetic waves to achieve the goal of stealth. There are two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/12D06N3/00
Inventor 余亚丽姜娟胡励张醒肖巍伟赵晓峰倪娜郭芳威
Owner SHANGHAI JIAO TONG UNIV
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