College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, PR China.
J Colloid Interface Sci. 2017 Jul 15;498:161-169. doi: 10.1016/j.jcis.2017.03.049. Epub 2017 Mar 14.
To satisfy the diverse requirements of low reflection and high absorption of microwave attenuation, the construction of multiple heterojunction structure is imperative. On the one hand, the impedance mismatching could be ameliorated via the addition of new component; on the other hand, the multiple interface polarizations derived from the architecture of heterojunction make for the dissipation of microwave. In this work, the ternary TiO/RGO/FeO composites exhibit tremendous superiority compared with single TiO or RGO no matter the absorption coefficient or effective bandwidth. The maximum absorption value of the TiO/RGO/FeO composites is -44.05dB at 14.48GHz with a low thickness of 2.0mm. In addition, the effective bandwidth (RL<-10dB) reaches 5.6GHz from 11.96 to 17.56GHz. The superior electromagnetic wave absorbing performance of the TiO/RGO/FeO composites derived from the appropriate impedance matching as well as the multiple polarization effect. The results adequately demonstrate the accessibility of the prepared TiO/RGO/FeO composites as a preeminent absorber.
为了满足微波衰减低反射和高吸收的多样化需求，必须构建多种异质结结构。一方面，通过添加新组件可以改善阻抗失配；另一方面，异质结结构产生的多个界面极化有助于微波的耗散。在这项工作中，与单一的 TiO 或 RGO 相比，三元 TiO/RGO/FeO 复合材料无论在吸收系数还是有效带宽方面都表现出巨大的优势。TiO/RGO/FeO 复合材料的最大吸收值为-44.05dB，在 14.48GHz 时厚度为 2.0mm。此外，有效带宽（RL<-10dB）从 11.96GHz 到 17.56GHz 达到 5.6GHz。TiO/RGO/FeO 复合材料具有优异的电磁波吸收性能，这归因于适当的阻抗匹配和多重极化效应。结果充分证明了所制备的 TiO/RGO/FeO 复合材料作为一种卓越的吸收剂的可行性。
