多孔碳的制备及HMTA对其微波介电性能的影响  

Preparation of Porous Carbon and the Effect of HMTA on its Microwave Dielectric Properties

作　　者：王妍[1] 杨子[1] 黄云霞[1] 黄民松[1] 缘依依 陈盼[1] 

机构地区：[1]西安电子科技大学先进材料与纳米科技学院,陕西西安710071

出　　处：《电子科技》2015年第4期173-175,181,共4页Electronic Science and Technology

摘　　要：以糠醛（F）和间苯二酚（R）为碳源、六次甲基四胺（HMTA）为催化剂,叔丁醇（T）为溶剂,采用溶胶-凝胶和高温热解法制备多孔碳。利用扫描电子显微镜（SEM）、X射线衍射仪（XRD）对所得样品的形貌和物相进行表征,利用矢量网络分析仪,在8.2~12.4 GHz频率范围对样品的微波介电性能进行测量。结果表明,热解碳产物具有类石墨结构。当R与H的比值为75时,在频率11.35 GHz,其介电损耗高达1.01。同时,对多孔碳产生介电损耗的机理进行了探讨。Porous carbons were synthesized by using pyrolysis precursors from furfural（ F） and resorcinol（ R）as reactant and hexamethylene-tetramine（ H） as catalyst via sol-gel method. As-products were characterized and tested for microwave absorption applications. From X-ray diffraction and scanning electron microscopy,it was found that the porous carbons possess the graphite-like structure. The vector network analyzer was used to evaluate the microwave dielectric properties of the samples in the frequency range of 8. 2 ~ 12. 4 GHz. The results show that the dielectric loss of the RH75 sample reaches the highest value,which is 1. 01 at 11. 35 GHz. The proposed mechanisms for producing dielectric loss in the porous carbon samples are discussed.

关 键 词：多孔碳 介电性能 溶胶-凝胶 高温热解 

分 类 号：TN304[电子电信—物理电子学]