钛基金属掺混纳米金刚石阴极的场发射特性（英文）  

Field Emission Characteristics of Metal-doped Nanodiamond Cathode on Titanium Substrate

作　　者：杨延宁[1] 李伟霞[1] 张志勇[2] 翟春雪[2] 刘巧平[1] 

机构地区：[1]延安大学,陕西延安716000 [2]西北大学,陕西西安710127

出　　处：《稀有金属材料与工程》2017年第3期617-621,共5页Rare Metal Materials and Engineering

基　　金：Ph.D.,Start-up Foundation of Yan’an University(YD 2010-04);Special Foundation of Yan’an University(YDZD 2011-01);2014 Education and Innovation Project of Yan’an University for Graduate Student;2014 Local University National Training Project of Innovation and Entrepreneurship for Undergraduates(201410719023)

摘　　要：研究了钛基金属掺混纳米金刚石的场发射特性。以钛和铪分别和纳米金刚石掺混,采用电泳法制得了阴极样品,并使用SEM和XRD对阴极样品的结构和形貌进行表征,最后进行场发射特性的测试。结果发现,掺入5 mg的钛样品的形貌更加均匀和致密,而掺入铪样品的形貌变差。同时,与未掺杂样品相比较而言,掺钛样品的场发射特性有了提高,而掺铪样品的场发射特性有所下降。掺钛样品之间的比较发现,钛掺入量不宜过多,适量的钛掺入能使得纳米金刚石阴极的场发射性能得到提高。分析表明,这是由金属钛和铪的性质决定的,影响了金刚石与基底Ti的键合反应,从而影响了掺杂纳米金刚石的场发射性能。Field emission characteristics of metal-doped nano-diamond on titanium substrate were studied, wherein metals——Ti and Hf were mixed with nano-diamond separately, and cathode samples were prepared by electrophoresis. Then the structures and morphologies of cathode samples were characterized by SEM and XRD; finally, field emission tests were conducted. Results show that the morphology of 5 mg Ti-doped sample is more uniform and dense, but the morphologies of Hf-doped samples become worse. Meanwhile, compared with the undoped sample, field emission characteristics of Ti-doped samples improve, while those of Hf-doped samples decrease. From the comparison between Ti-doped samples, it is found that the amount of Ti mixed with nano-diamond should not be too much; a moderate amount of Ti can improve field emission characteristics of nano-diamond on Ti substrate. It is determined by the nature of metal Ti and Hf, which influences the bonding reaction between nano-diamond and substrate Ti, thus affecting, field emission characteristics of doped nano-diamond on Ti substrate.

关 键 词：纳米金刚石 金属 SEM XRD 场发射特性 

分 类 号：TB383.1[一般工业技术—材料科学与工程]