高效磁性纳米晶/掺杂石墨烯协同微波吸收体的微纳结构和界面效应研究

项目名称： 高效磁性纳米晶/掺杂石墨烯协同微波吸收体的微纳结构和界面效应研究

项目编号： No.11504293

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 李兴华

作者单位： 西北大学

项目金额： 24万元

中文摘要： 本项目将围绕未来信息通讯和军事雷达领域发展的关键技术—微波吸收材料展开。拟采用化学法制备出一系列负载有不同磁性纳米颗粒的掺杂石墨烯基复合材料。按照需求调控复合材料中掺杂石墨烯上的掺杂源和杂化度以及磁性颗粒的种类、形貌、尺寸和负载量等，制备出无“磁死层”存在以及不团聚的磁性纳米颗粒/掺杂石墨烯复合材料，获得能用于GHz频段的高性能、低能耗、低密度的微波吸收材料。分析复合材料的微纳结构和界面结合作用，探讨微纳结构和界面效应对其作为协同电磁波吸收体的影响。从复合材料的微纳结构和界面效应层次研究其吸波机理，建立其抗电磁干扰的物理模型。结合掺杂石墨烯介电常数可调、密度小的特点和磁性纳米颗粒优异的磁特性，该复合物有望成为新型轻质量吸波材料而广泛用于未来的通讯领域。

中文关键词： 磁性纳米材料；掺杂石墨烯；微纳结构；界面效应；微波吸收

英文摘要： This work focuses on the fabrication and characterization of the electromagnetic wave absorption materials which are the key technologies for radio communications and military in the future. Various chemical routes will be adopted to synthesize a series of doping graphene-based magnetic hybrids. Through changing the types and amounts of the doping elements, the types, sizes, shape and loading amounts of the magnetic nanoparticles anchored on the doping graphene as desire, Doping graphene nanosheets anchored by uniform magnetic nanoparticles without “dead area” of null magnetic components are aimed to used as microwave absorption materials with high-performance, low-energy and low density properties. This work aims to establish the physical model for the microwave absorption mechanism of the hybrids in terms of the nanostructure and interfacial effect. Combining both the benefits of remarkable complex permeability from magnetic nanoparticles and permittivity from light-weight graphene, the composites are promised to be novel light-weight absorbing materials to be applied in communications in the future.

英文关键词： magnetic nanomaterials;doping graphene;nanostructure;interface effect;microwave absorption