Microwave absorbing materials play a critical role within the realms of information and homeland security in times of both peace and international conflicts; as such, discovering new materials for microwave absorption is of critical importance due to their applications in civil and military technologies. In this study, we report for the first time FeP nanoparticles as a promising material for microwave absorption. The FeP nanoparticles, fabricated through a facile thermal phosphorization process, display impressive microwave absorption performance with a reflection loss of −37.68 dB at 13.6 GHz, indicating a large absorption efficiency over 99.9%. As the thickness of the microwave absorber increases from 1.0 to 6.0 mm, the microwave absorbing peak frequency (f_max) shifts to lower frequencies monotonically, and the critical absorbing peak width (Δf₁₀: peak width at RL = −10 dB) increases monotonically, while the reflection loss stays below −33.0 dB. This indicates a robust performance across a tunable frequency range from 8.86 to 15.1 GHz for microwave absorption. These characteristics demonstrate that FeP nanoparticles may act as a new and promising microwave absorbing material.

中文翻译：

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FeP纳米颗粒：一种新型的微波吸收材料

在和平与国际冲突时期，吸收微波的材料在信息和国土安全领域起着至关重要的作用；因此，发现新的微波吸收材料由于其在民用和军事技术中的应用而至关重要。在这项研究中，我们首次报道了FeP纳米颗粒作为一种有前途的微波吸收材料。通过便捷的热磷化工艺制备的FeP纳米粒子显示出令人印象深刻的微波吸收性能，在13.6 GHz处的反射损耗为-37.68 dB，表明吸收效率超过99.9％。当微波吸收器的厚度从1.0毫米增加到6.0毫米时，微波吸收峰值频率（f _max）单调移至较低频率，临界吸收峰宽度（Δf ₁₀：RL = -10 dB时的峰宽度）单调增加，而反射损耗保持在-33.0 dB以下。这表明在8.86至15.1 GHz的可调频率范围内，微波吸收性能强劲。这些特征表明，FeP纳米颗粒可以作为一种新型的有前途的微波吸收材料。