摘要
为了研究碳纳米管薄膜的强流脉冲发射特性,采用酞菁铁高温热解方法在机械抛光铜基底上直接生长了碳纳米管薄膜(Cu-CNTs),Cu-CNTs生长方向各异.在20GW脉冲功率源系统中采用二极结构对Cu-CNTs的强流脉冲发射特性进行研究,研究结果表明:在单脉冲发射条件下,随脉冲电场峰值的增大,Cu-CNTs薄膜的发射电流峰值呈线性增加,当宏观场强为15.5V/μm时,发射脉冲电流的峰值可达到5.56kA,对应的发射电流密度0.283kA/cm2,当宏观场强达到32.0V/μm时,发射脉冲电流的峰值可达到18.19kA,对应的发射电流密度0.927kA/cm2,发射电流能力明显优于已有报道.在相同峰值,连续多脉冲情况下,碳纳米管薄膜具有良好的发射可重复性,且发射性能稳定.
In order to study intense pulsed emission characteristics of carbon nanotube films （CNTs）, CNTs were synthesized on the surface of Cu substrate （Cu-CNTs） by pyrolysis of iron phthalocyanine （FePc）. Orientations of CNTs obtained are different from one another. Intense pulsed field emission of CNTs was measured on the 20GW pulse power system using a diode structure. For single pulse emission, the emission current peak of Cu-CNTs increases linearly with pulse field peak, at the applied peak electric field of ～ 15.5 V/μm; the current peak is ～ 5.56 kA, and equivalent emission current density is ～ 0.283 kA/cm^2 . At the applied peak electric field of ～ 32.0 V/μm, the current peak can achieve ～ 18.19kA, and the equivalent emission current density is～ 0.927 kA/cm^2 ; the ability of emission current of CNTs is obviously better than that reported. In many continuous and similar peak pulse emissions, Cu-CNTs provide with good repeatability of pulsed emission, and present better emission stability.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第15期558-562,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:51072184
50972132
51002143
61274012
61172041)
航空科学基金项目(批准号:2011ZF55015)
河南省高等学校青年骨干教师资助计划项目(批准号:2011GGJS-140)
河南省基础与前沿技术研究计划项目(批准号:112300410264)资助的课题~~
关键词
强流脉冲发射
碳纳米管
铜基底
稳定性
intense pulsed emission
carbon nanotubes
copper substrate
stability
