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高温氧化物陶微波吸收器,通过电子移位介导的热电迁移来实现

Ruopeng Cui¹, Zewen Duan¹, Yi Li²

¹State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China.

Nature communications

|October 16, 2025

概括

稀土基陶提供稳定,高温微波吸收高达1600°C. 这一突破利用热电子迁移在航空航天隐形应用中提高性能.

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:

高温微波吸收材料 (HTMAM) 对航空航天隐形至关重要.
现有的HTMAM面临着诸如磁性损失降解和高温氧化等挑战.

研究的目的:

开发用于极端环境的新型,空气稳定的HTMAM.
研究热电迁移和电子移位在微波吸收中的作用.

主要方法:

合成稀土烯酸陶 (Er2Zr2O7 / Gd2Zr2O7) 的合成.
对高达1600°C的空气稳定性进行表征.
通过电子移位和晶格障碍进行电容度调制的分析.
评估微波吸收性能和导热性.

主要成果:

稀土石陶显示出高达1600°C的优异稳定性.
氧气空缺通过在高温下进行热电迁移来增强导电性.
双层Er2Zr2O7/Gd2Zr2O7结构实现了超宽带宽 (8.27 GHz) 和强吸收 (-64.61 dB) 在600°C和1.2毫米厚度.
观察到超低的导热率 (1.61 W•m−1•K−1).

结论:

通过电子移位调整的热电迁移为设计高性能,抗氧化HTMAM提供了一种新的策略.
开发的材料显示出在极端的航空航天环境中结构功能整合的前景.
这种方法推动了先进的微波吸收材料的设计.

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