Synthesis and enhanced microwave absorption properties: a strongly hydrogenated TiO nanomaterial.

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.