六硼化铕亚微米管的电子场发射性能(英文)  

Filed-Emission of Electrons from EuB_6Submicrotubes

作　　者：许军旗[1] 王艳蕊[1] 赵彦明[2] 张勤远[2] 余本海[1] 孙海斌[1] 

机构地区：[1]信阳师范学院,信阳464000 [2]华南理工大学,广州510640

出　　处：《无机化学学报》2010年第6期1056-1060,共5页Chinese Journal of Inorganic Chemistry

基　　金：supported by the National Nature Science Foundation of China (NSFC, No: 50472055);Science and Technology Program of Henan Province (No.082300410050, 092300410209, 092300410207);Foundation of Henan Educational Committee(2010A140015)~~

摘　　要：以铕(Eu)粉末和三氯化硼(BCl3)作为前驱体,用简单的化学气相沉积方法制备了六硼化铕(EuB6)亚微米管。用XRD,SEM拉曼光谱,和TEM来表征EuB6微米管的形貌和晶体结构。场发射测试结果表明:根据F-N公式,场发射电流和电场之间在不同的阶段分别满足直线关系。Functional polycrystalline EuB6 submicrotubes were synthesized via a simple, one-step chemical vapor deposition（CVD） method using Eu powders and BCl3 gas as precursors without any catalysts. The morphology and crystal structure of the EuB6 submicrotubes were characterized by XRD, Raman spectroscopy, SEM and TEM. The dependence of the field emission current density J on the applied electric field E follows a two-stage slope behavior in ln（J/E2）-1/E plot according to Fowler-Nordheim equation.

关 键 词：EuB6 化学气相沉积 纳米管 场发射 稀土 

分 类 号：O641.3[理学—物理化学]