Feng Wanlin, Luo Heng, Wang Yu, Zeng Sifan, Deng Lianwen, Zhou Xiaosong, Zhang Haibin, Peng Shuming
Innovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics Mianyang 621900 China
School of Physics and Electronics, Institute of Super-microstructure and Ultrafast Process in Advanced Materials, Central South University Changsha 410083 China.
RSC Adv. 2018 Jan 10;8(5):2398-2403. doi: 10.1039/c7ra12616f. eCollection 2018 Jan 9.
In this work, we demonstrate the enhancement of microwave attenuation capability of TiC enabled microwave absorbing materials (MAMs) within a frequency range of 2-18 GHz. TiC nano-sheet/paraffin composites exhibit enhanced microwave absorbing performance with an effective absorbing bandwidth of 6.8 GHz (11.2-18 GHz) at 2 mm and an optimal reflection loss of -40 dB at 7.8 GHz. Moreover, mechanisms for the dielectric responses of the TiC MXene nanosheets are intensively discussed. Three typical electric polarizations of TiC are illustrated with the Cole-Cole diagram. The enhanced microwave absorbing properties can be ascribed to the high dielectric loss accompanied with the strong multi-reflections between MXene layers.
在本工作中，我们展示了在2-18 GHz频率范围内，TiC增强了微波吸收材料（MAMs）的微波衰减能力。TiC纳米片/石蜡复合材料表现出增强的微波吸收性能，在2 mm厚度时有效吸收带宽为6.8 GHz（11.2-18 GHz），在7.8 GHz时最佳反射损耗为-40 dB。此外，还深入讨论了TiC MXene纳米片的介电响应机制。用Cole-Cole图说明了TiC的三种典型电极化。增强的微波吸收性能可归因于高介电损耗以及MXene层之间强烈的多次反射。
