通过双相高工程调节电磁基因,朝着温度稳定的超宽带兆赫兹电磁波吸收方向
Xiaoji Liu1, Yuping Duan2, Nan Wu3
1Qingdao Innovation and Development Base of Harbin Engineering University, Harbin Engineering University, Qingdao, 266000, People's Republic of China.
Nano-micro letters
|February 24, 2025
概括
新的高氧化物/合金复合材料提供了增强的电磁波吸收. 这些材料为超宽带吸收提供了更好的磁损失和阻抗匹配,即使在极端温度下也是如此.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 电磁主义 电磁主义
背景情况:
- 高透性磁吸收器对于低频和宽带电磁波 (EMW) 吸收至关重要.
- 现有的吸收器由于磁损失不足和高导电性而面临限制,限制带宽扩展.
研究的目的:
- 开发具有增强EMW吸收性能的新型磁吸收器.
- 通过改进磁性损失和阻抗匹配来克服吸电器的局限性.
- 为了实现温度稳定的超宽带EMW吸收.
主要方法:
- 在FeCoNiCr0.4Cu0.2高合金 (HEA) 上通过低温氧浴处理构建 (FeCoNiCrCu) 3O4高氧化物 (HEO).
- 利用HEO和HEA的不同磁晶异构,以实现连续的自然共振和改善磁性损失.
- 采用HEO的低导电性作为磁电共调的阻抗匹配层.
主要成果:
- 双相高复合材料 (BPHEC) 在5毫米厚度下实现了12.8dB的最小反射损失和633MHz的吸收带宽.
- 该材料证明了显著的雷达截面 (RCS) 减少18.34dBm2与阻抗梯度多层结构.
- 观察到异常的温度稳定性,吸收带宽保持在593和691 MHz之间,从-50°C到150°C,同时具有高基里温度和抗氧化性.
结论:
- 开发的BPHEC表现出卓越的EMW吸收性能,包括超宽带功能和出色的热稳定性.
- 在HEA上构建HEO的策略为先进的EMW吸收应用优化电磁性质提供了一个可调的方法.
- 这项研究为设计下一代,温度稳定和超宽带EMW吸收器提供了有希望的途径.
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