一种高度缺陷的中性矿陶,用于在恶劣环境下对电磁干扰进行屏蔽
Yongping Liu1, Ping Tuo2, Fu-Zhi Dai2
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China.
Advanced materials (Deerfield Beach, Fla.)
|April 29, 2024
概括
一种新的矿陶在恶劣的航空航天环境中提供卓越的电磁干扰 (EMI) 屏蔽. 这种材料在高温和氧化条件下保持有效性,这对于先进的应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 航空航天工程 航空航天工程
- 陶制品 在陶方面.
背景情况:
- 可靠的电磁干扰 (EMI) 屏蔽材料对于航空航天应用至关重要,特别是在高温,氧化环境中.
- 现有的导体型材料 (例如金属) 在氧化下降解,而介电型材料在千兆赫兹 (GHz) 频率下缺乏足够的屏蔽效率.
研究的目的:
- 开发和展示一种高效的EMI屏蔽材料,能够承受恶劣的航空航天条件.
- 调查高缺陷的中 (ME) 矿陶对于高温EMI屏蔽的潜力.
主要方法:
- 制造一个高缺陷的中 (ME) 矿陶.
- 研究了稳定和替代在A位点上的协同效应,以创造Ti和O空缺.
- 评估了材料在高温氧化下 (1000 °C在空气中100小时) 的稳定性及其在X频段的EMI屏蔽效果.
主要成果:
- 由于稳定和有价替代,ME矿陶具有异常高的稳定Ti和O空缺度.
- 空白集群导致在GHz范围内产生巨型复杂的电容性和极化损失.
- 在X频段实现了超过30dB/mm的特定EMI屏蔽效率,即使在长时间的高温回火后.
结论:
- 性ME矿陶在恶劣环境中表现出卓越的EMI屏蔽性能,性能优于常规材料.
- 它在高温和氧化条件下的稳定性使其适用于苛刻的航空航天应用.
- 该材料的双功能特性,包括低导热性,使其适用于飞机发动机和可重复使用的火箭.
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