多层混合晶格架构,用于宽带电磁吸收和改善结构度
Hyoui Yoon1,2, Dahyun Daniel Lim3,4, Grace X Gu4
1Department of Mechanical and Biomedical Engineering, Ewha Womans University, Seoul 03760, Republic of Korea. sr.lee@ewha.ac.kr.
Materials horizons
|December 5, 2025
概括
这项研究引入了新的混合晶格元材料吸收器,这些吸收器将宽带电磁波吸收与增强的机械刚性相结合. 优化的OT-SC-SC配置显著提高了刚性,同时保持了高级EMI屏蔽应用的高吸收率.
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
- 机械工程 机械工程
背景情况:
- 电磁干扰 (EMI) 是现代电子设备的一个重大挑战.
- 超材料吸收器提供优异的电磁波衰减,但往往缺乏机械刚性.
- 现有的解决方案难以平衡电磁性能与结构完整性.
研究的目的:
- 开发一类新的分层混合格子吸收器,具有增强的机械刚性和宽带电磁波吸收.
- 为了研究格子布局和电磁和机械性能之间的关系.
- 为下一代多功能吸收器提供框架.
主要方法:
- 开发三层混合格子,结合简单的立方体 (SC),身体中心的立方体 (BC) 和八度结构 (OT) 架构.
- 用有限元模拟来评估电磁响应和在4-18 GHz频率范围内的有效刚度.
- 分析格子布局对阻抗匹配,能量再分配和承载能力的影响.
主要成果:
- 在上层的八位结构 (OT) 格子实现了>95%的平均EM吸收,这是由于阻抗匹配的改进.
- 下层的SC格子增强了承载能力.
- 与OT-OT-OT相比,OT-SC-SC配置显示出~36%更大的外平面和~118%更大的内平面刚度,同时保持强大的电磁吸收.
结论:
- 网格类型的定制空间布局可以同时优化电磁和机械功能.
- 在顶部放置一个OT格子,在底部放置一个SC格子是多功能元材料吸收器的有效策略.
- 这种方法为先进的EMI屏蔽和机械弹性应用提供了基础.
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