裂解碳/氧化铝陶瓷复合材料的制备与介电性能研究  

Preparation And Dielectric Properties of Amorphous Carbon/alumina Ceramic Composites

作　　者：曹呈龙 赵梓超 丁圆 张千禧 刘玉鑫 程传兵 CAO Chenglong;ZHAO Zichao;DING Yuan;ZHANG Qianxi;LIU Yuxin;CHENG Chuanbing(Key Laboratory of Processing and Testing Technology of Glass&Functional Ceramics of Shandong Province,School of Materials Science and Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353)

机构地区：[1]齐鲁工业大学(山东省科学院),材料科学与工程学院,山东省玻璃与功能陶瓷加工与测试技术重点实验室,济南250353

出　　处：《陶瓷》2020年第11期16-20,共5页Ceramics

基　　金：齐鲁工业大学校级大学生创新创业训练计划项目(项目编号:XJ201910431096);国家自然科学基金项目(项目编号:51901109)。

摘　　要：笔者采用浸渍-碳化工艺成功制备了裂解碳/氧化铝(C/Al2O3)陶瓷复合材料,并利用XRD、SEM、阻抗分析仪等分析测试手段,研究了不同碳含量对C/Al2O3复合材料的微观形貌以及电学性能的影响。通过调节复合材料的碳含量,在10 MHz^1 GHz的频率范围内实现了常规材料的负介电常数,同时材料的导电机理由跳跃电导转变为类金属电导。研究发现,材料中自由电子的等离子体振荡导致了负介电常数的出现。相关研究不仅拓展了传统氧化铝陶瓷的潜在应用,也为电磁超材料的研究提供了新的设计思路。In this paper,the amorphous carbon/alumina(C/Al 2O 3)ceramic composites were successfully synthesized by the impregnation-carbonization method.We analyzed the influence of carbon content on the microstructure and electrical properties of composites by XRD,SEM,and impedance analyzer testing methods.The negative permittivity was obtained in the frequency range of 10MHz-1GHz by adjusting the carbon content of composites,and the electrical conductivity is converted from jumping conductance into metal-like conductivity.It was found that low-frequency plasmonic state provided by plenty of free electrons in the carbon networks resulted in the negative permittivity.This work not only expands the potential applications of traditional alumina ceramics,but also provides a new design idea for electromagnetic metamaterials.

关 键 词：电磁超材料 氧化铝陶瓷 浸渍-碳化工艺 负介电常数 

分 类 号：TQ174.758[化学工程—陶瓷工业]