| 铁电阴极制备与性能实验研究 |
| |
| 引用本文： | 张庆辉,郑曙昕,唐传祥,李泉凤.铁电阴极制备与性能实验研究[J].强激光与粒子束,2005,17(6):935-938. |
| |
| 作者姓名： | 张庆辉 郑曙昕 唐传祥 李泉凤 |
| |
| 作者单位： | 清华大学 工程物理系 加速器实验室，北京 100084 |
| |
| 基金项目： | 国家863计划项目资助课题 |
| |
| 摘 要： | 讨论了不同发射机理对铁电阴极材料性能的要求，对PZT（锆钛酸铅）系铁电陶瓷工艺过程中的关键步骤进行了研究。通过掺杂改性和改进预烧条件等手段，有效地改善了材料的性能参数，制备出相对介电常数大于3 000的弛豫相铁电陶瓷和压电常数大于500×10-12C/N的铁电相铁电陶瓷。在初步的发射实验中，使用改进工艺后的PLZT8/65/35制备的铁电阴极，触发脉冲5.4 kV时，获得的发射电子电流密度达到800 A/cm2/sup>，远大于C-L定律计算的发射电流。
|
| 关 键 词： | 铁电阴极 极化反转 电子发射 掺杂改性 |
| 文章编号： | 1001-4322(2005)06-0935-04 |
| 收稿时间： | 2004/12/3 |
| 修稿时间： | 2004年12月3日 |
Preparation and characteristics of ferroelectric cathode |
| |
| ZHANG Qing-hui,ZHENG Shu-Xin,TANG Chuan-Xiang,LI Quan-feng.Preparation and characteristics of ferroelectric cathode[J].High Power Laser and Particle Beams,2005,17(6):935-938. |
| |
| Authors: | ZHANG Qing-hui ZHENG Shu-Xin TANG Chuan-Xiang LI Quan-feng |
| |
| Institution: | Department of Engineering Physics，Tsinghua University，Beijing 100084, China |
| |
| Abstract: | The mechanism of emission from ferroelectric cathode was introduced. With the purpose of obtaining the ferroelectric cathode material with large emission current density, the preparation conditions of PZT series ceramic were studied. By doping, modifying and some other methods of processing amelioration, the improvement of performance was observed in both ferroelectric and relaxor ferroelectric ceramic. In the preliminary experiment, with 5.4 kV external pulsed voltage, the electron emission density of PLZT8/65/35 reached up to 800 A/cm2, which was much greater than that calculated by C-L principle. |
| |
| Keywords: | Ferroelectric cathode Polarization reversal Electron emission Doping |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《强激光与粒子束》浏览原始摘要信息 |
| 点击此处可从《强激光与粒子束》下载免费的PDF全文 |
