School of Physics and Technology, and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, People's Republic of China.
Nanotechnology. 2017 Oct 20;28(42):425701. doi: 10.1088/1361-6528/aa81ba. Epub 2017 Jul 24.
Due to its improved physical and chemical performances, a strongly hydrogenated TiO was designed and produced successfully by using a sealing-transfer reduction method at a relatively low temperature (425 °C). The microstructures, electromagnetic and microwave absorbing properties were investigated in detail. Experimental results revealed that: (1) the minimum reflection loss (RL) value of the hydrogenated TiO up to -53.8 dB (99.999 99% of EM wave attenuation) was reached at 11.2 GHz, and the RL values below -20 dB (99%) were obtained in a frequency range of 7.3-16.8 GHz. (2) Compared to pristine TiO and black TiO in other reports, the present hydrogenated TiO exhibited greatly improved microwave absorption performance. Moreover, the mechanism was also discussed. It was demonstrated that the excellent microwave absorption performance of the black TiO arose from the strong dielectric loss, excellent impedance matching and attention loss due to associated relaxation and interfacial polarization. It is expected that the hydrogenated TiO exhibits great potential applications in the area of high performance microwave absorbing materials. In addition, it is believed that the black TiO @ magnetic metals composites will display an excellent microwave absorbing property.
由于其物理和化学性能得到了改善，通过在相对较低的温度（425°C）下使用密封转移还原法，成功设计并制备了一种强氢化 TiO。详细研究了其微观结构、电磁和微波吸收性能。实验结果表明：（1）氢化 TiO 的最小反射损耗（RL）值达到-53.8 dB（99.999 99%的电磁波衰减），在 7.3-16.8 GHz 的频率范围内，RL 值低于-20 dB（99%）。（2）与原始 TiO 和其他报道中的黑 TiO 相比，本研究中的氢化 TiO 表现出了优异的微波吸收性能。此外，还讨论了其机制。证明了黑 TiO 的优异微波吸收性能源于强烈的介电损耗、优异的阻抗匹配以及源于关联弛豫和界面极化的衰减损耗。预计氢化 TiO 在高性能微波吸收材料领域具有广阔的应用前景。此外，相信黑 TiO@磁性金属复合材料将具有优异的微波吸收性能。
