Synthesis and microwave absorption performance of heat-treated RF/SiO2 aerogels

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外文摘要：The well-designed composite with satisfactory electromagnetic microwave absorption at high temper-atures remains a serious challenge.Herein,we fabricated a resorcinol-formaldehyde/silica dioxide composite aerogel(RF/SiO2)with a three-dimensional network structure using sol-gel,atmospheric pressure drying technique as well as heat-treated processes to achieve enhanced microwave absorption capabilities in the low frequency range.The pristine RF/SiO2 aerogel presented a typical micropores structure with a surface area,porous volume,and density of 146.82 m2/g,62.40％,and 0.28 cm3/g,respectively.Remarkably,the RF/SiO2 aerogel showed an effective absorption bandwidth of 3.56 GHz and a minimum reflection loss value of-46.10 dB at 2.25 mm after being heat-treated at 1500 ℃,while the maximum effective absorption bandwidth was 3.60 GHz at 2.30 mm.The intricate three-dimensional networks possessed remarkable impedance matching,multiple attenuation mechanisms,interfacial polarization,and dielectric loss,which were attributed to the exceptional ability to absorb electro-magnetic microwaves.It offered a fresh approach to creating adaptable and effective microwave ab-sorption materials in military defense.

外文关键词：

RF/SiO2AerogelHeat-treatedMicrowave absorption

作者：

Xinli Ye、Hao Yu、Kai Zheng、Shan Li、Xiaomin Ma、Bangxiao Mao、Junxiong Zhang

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作者单位：

School of Civil Aviation,Northwestern Polytechnical University,Xi'an 710072,PR China

Research & Development Institute of Northwestern Polytechnical University in Shenzhen,Shenzhen 518057,PR China

Yangtze River Delta Research Institute of Northwestern Polytechnical University,Suzhou 215400,PR China

National Equipment New Material & Technology(Jiangsu)Co.,Ltd,Suzhou 215400,PR China

Beijing Xinfeng Aerospace Equipment Co.,Ltd,Beijing 100854,PR China

School of Textile and Clothing,Nantong University,Nantong 226019,PR China

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基金：

中央高校基本科研业务费专项中央高校基本科研业务费专项中国博士后科学基金陕西省自然科学基金陕西省自然科学基金Guangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationBasic Research Programs of TaicangBasic Research Programs of TaicangBasic Research Programs of Taicang

项目编号：

D5000210522D50002105172021M7026652022JQ-4822023-JC-QN-03802021A15151111552022A15151112002022A1515011191TC2021JC01TC2021JC21TC2022JC08

出版年：

2024

DOI：

10.1016/j.dt.2023.10.006

防务技术

中国兵工学会

防务技术

CSTPCD

影响因子：0.358

ISSN：2214-9147

年,卷(期)：2024.34(4)