宽带电磁吸收高达1473K,通过陶复合材料的介电频率分散工程实现
Bin Ren1, Yujun Jia2,3, Lehua Qi4
1Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, Northwestern Polytechnical University, Xi'an, 710072, PR China.
Nature communications
|December 10, 2025
概括
新的超高温陶化物为高速车辆提供宽带电磁波吸收. 该材料在极端温度下保持性能,克服了当前高温吸收器的局限性.
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
- 陶工程 陶工程 陶工程
背景情况:
- 高速车辆需要宽带电磁波 (EMW) 吸收器来实现高温运行.
- 现有的材料与温度敏感的介电频率分散 (FD) 斗争,限制有效吸收带宽 (EAB),并需要复杂的结构.
研究的目的:
- 开发一种新的EMW吸收器,克服高温限制.
- 通过使用受控的FD调节策略,实现宽带EMW吸收与环境耐用性.
主要方法:
- 使用了具有可调整表面氧化物厚度的多变异超高温陶 (UHTC) 化物.
- 灵感来自于有限元法用于受控的FD调节.
- 制造的材料没有复杂的结构设计.
主要成果:
- 在没有结构设计的情况下,在2.8毫米厚度下实现了26.98 GHz的宽EAB.
- 证明了对环境的抗性.
- 在1473K保持有效的FD调节,在氧化层应用后产生10.26GHz的EAB.
结论:
- 开发的UHTC化物材料为高温宽带EMW吸收提供了一个有前途的解决方案.
- 控制的FD调节策略有效地克服了传统高温吸收器的局限性.
- 该材料显示出在高速车辆中隐形应用的巨大潜力.
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