【作者】 许金豹；

【导师】 李成榕；

【作者基本信息】 华北电力大学（北京） ， 高电压与绝缘技术， 2008， 硕士

【摘要】 在介质阻挡放电(Dielectric Barrier Discharge,简写DBD)研究中,人们认为阻挡材料对放电有重要影响,但相关机理研究较少。本文以6个不同电晕表面改性时间(0小时、14小时、24小时、48小时、96小时和120小时)的硅橡胶作为阻挡介质材料,研究了低气压(0.5kpa～52kpa)下的介质阻挡放电现象。发现维持均匀放电的气压范围与硅橡胶材料有关,硅橡胶电晕表面改性时间越长,形成均匀放电的气压范围越宽,电晕表面改性120小时的试样均匀放电的气压范围达到了46kpa,较未表面改性时(35kpa)提高了30%。另外,本文利用扫描电镜分析和热刺激电流法,测量了6个试样的陷阱特性。结果表明:电晕表面改性时间越长,峰值电流越大,陷阱电荷量越大,陷阱能级越大但数值都小于1eV。本文的工作结果说明阻挡介质材料表面的浅陷阱对均匀放电具有重要影响。更多还原

【Abstract】 In Dielectric Barrier Discharge(DBD), It is believed that barrier material has animportant impact on discharge. In this paper, six pieces of silicon rubber which haddifferent corona surface modified time (0 hour, 14 hours, 24 hours, 48 hours, 96 hoursand 120 hours) were used as barrier dielectric material to study phenomenon aboutdielectric barrier discharge at low air pressure (0.5kpa~52kpa). It was found that rangein which uniform discharge maintained related to silicon rubber material. The longer thetime was, the wider the range was (46kpa in 120hous, 30 percent bigger than 35kpa in 0hour). In addition, using Scanning Electron Microscope (SEM) and thermally simulatedcurrent (TSC), we obtained characristic of traps about six samples. It was found that thelonger corona surface modified time was, the bigger peak current was, the more theamount of charges in traps was and the bigger energy level of traps was, but lower than1eV. From this paper, the conclusion that Shallow traps on barrier dielectric materialsurface has an important impact on uniform discharge can be made.更多还原