...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>電気学会論文誌 A:基礎.材料.共通部門誌 >Loss of Ba Atom from the Electrode of Fluorescent Lamp Operating under AC and DC Discharges
【24h】

Loss of Ba Atom from the Electrode of Fluorescent Lamp Operating under AC and DC Discharges

机译：在交流和直流放电下工作的荧光灯电极中Ba原子的损失

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Low work function is a vital life-determining characteristic of fluorescent lamp electrodes. The work function of a fluorescent lamp electrode increases due to the loss of Ba atom from the electrode. Hence the rate of Ba atom loss controls the lifetime of the lamp. However the loss mechanism and the optimum discharge condition has not been well understood yet. In the study, the loss of Ba atom from a fluorescent lamp electrode using a laser-induced fluorescence (LIF) technique is investigated. The lamp was operated at both AC 60 Hz and DC discharge modes with different discharge currents. In addition, the electrode of fluorescent lamp was connected through an external DC current source to control the electrode temperature. The effects of both the discharge current and the electrode temperature on the emission of Ba atom were investigated. For the lamp operation at 60 Hz, the physical behavior of the emission of Ba atom from the anode and the cathode were found to be different. The most of the loss of Ba atom was observed in an anode half-cycle, while this loss was lower in a cathode half-cycle. In the case of DC discharge, with increase in the discharge current, the loss of Ba atom was increased at the anode while it was decreased at the cathode. At the cathode the decrease in temperature was due to the electron emission from the cathode, which is called as "electron cooling" and it played an important role for the suppression of the Ba atom loss. Additionally, the sputtering of Ba atom due to ion bombardment was also considered to be an important factor for the loss of Ba atom from the cathode at a low discharge current.
机译：低功函是决定荧光灯电极寿命的重要特性。荧光灯电极的功函数由于电极中Ba原子的损失而增加。因此，Ba原子的损失率控制着灯的寿命。然而，尚未充分了解损失机理和最佳放电条件。在这项研究中，使用激光诱导荧光（LIF）技术研究了荧光灯电极中Ba原子的损失。该灯在AC 60 Hz和DC放电模式下以不同的放电电流运行。另外，荧光灯的电极通过外部直流电流源连接以控制电极温度。研究了放电电流和电极温度对Ba原子发射的影响。对于在60 Hz下的灯工作，发现阳极和阴极发出的Ba原子的物理行为不同。 Ba原子的大部分损失在阳极半循环中观察到，而在阴极半循环中损失则较低。在直流放电的情况下，随着放电电流的增加，Ba原子的损失在阳极增加，而在阴极减少。在阴极，温度的下降是由于阴极的电子发射而引起的，这被称为“电子冷却”，它对抑制Ba原子的损失起着重要的作用。另外，由于离子轰击引起的Ba原子的溅射也被认为是在低放电电流下从阴极损失Ba原子的重要因素。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号