热辅助层层交叉连接,以实现孔结构的可编程演变,以实现可调节的电磁响应能力
Bin Quan1,2, Yu Chen2, Litao Lin2
1School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China. binquan@nuist.edu.cn.
Nanoscale
|February 2, 2024
概括
研究人员使用冷干燥和现场技术开发了轻量级的气凝微波吸收器. 这些材料具有很好的电磁波吸收和宽带宽,在雷达截面减小方面提供了有前途的应用.
科学领域:
- 材料科学 材料科学 材料科学
- 电磁学 电磁学 电磁学 电磁学
- 纳米技术纳米技术
背景情况:
- 基于气凝的微波吸收材料对于电磁波 (EM) 管理至关重要.
- 开发具有宽带宽的轻型吸收器仍然是该领域的一个重大挑战.
- 现有的材料往往难以平衡吸收效率与材料重量和频率范围.
研究的目的:
- 为了制造轻量级,宽带的气凝微波吸收器.
- 为了研究孔隙结构,导电网络和电磁波吸收特性之间的关系.
- 为了实现高效的电磁干扰 (EMI) 屏蔽和雷达截面 (RCS) 减少.
主要方法:
- 使用冷干燥与现场热结构定向技术相结合,制造定向复合材料气凝.
- 集成的孔隙结构调节和导电网络构建可调节的EM响应.
- 进行了用于雷达截面 (RCS) 分析的数值模拟.
主要成果:
- CR-3气凝在2.2毫米时实现了最大反射损失 (RL) -50.8dB.
- 在2.0毫米的厚度下实现了5.4GHz的有效吸收带宽.
- 数字模拟显示,在0°检测角度下,CR-3气凝的最佳RCS降低为21.4dB/m2.
结论:
- 开发的气凝吸收器在广泛的频率范围内展示了高性能微波吸收.
- 同时优化孔隙结构和导电网络是实现高效气凝吸收器的关键.
- 这项研究为设计用于电磁波吸收应用的先进气凝材料提供了一条途径.
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