| 强电流铁电阴极电性能参数与发射结果的关系研究 |
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| 引用本文： | 蔡雪梅,张树人,周晓华,郭曙光,张恩官.强电流铁电阴极电性能参数与发射结果的关系研究[J].强激光与粒子束,1999,11(6):760-764. |
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| 作者姓名： | 蔡雪梅 张树人 周晓华 郭曙光 张恩官 |
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| 作者单位： | 1.电子科技大学材料工程系，四川成都，610054;2.中国工程物理研究院流体物理研究所，四川绵阳919-106信箱 |
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| 摘 要： | 在实验结果的基础上，从理论上阐述了材料的电滞回线、介电常数、压电常数等性能对电流发射性能的明显影响，并通过材料的掺杂改性提高材料的性能参数，从而达到了提高发射电流密度的目的。
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| 关 键 词： | 铁电阴极 发射电流密度 介电参数 |
| 文章编号： | 1001-4322(1999)06-0760-05 |
| 收稿时间： | 1900-01-01; |
| 修稿时间： | 1999年6月10日 |
A RESEARCH ON THE RELATIONSHIP OF THE ELECTRIC PARAMETER AND THE EMITTED RESULTS FROM THE FERROELECTRIC CATHODES |
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| CAI Xue-mei, ZHANG Shu-ren, ZHOU Xiao-hua, GUO Shu-guang.A RESEARCH ON THE RELATIONSHIP OF THE ELECTRIC PARAMETER AND THE EMITTED RESULTS FROM THE FERROELECTRIC CATHODES[J].High Power Laser and Particle Beams,1999,11(6):760-764. |
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| Authors: | CAI Xue-mei ZHANG Shu-ren ZHOU Xiao-hua GUO Shu-guang |
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| Abstract: | Maximum current density of 123A/cm2 has been obtained from PZT ferroelectric cathodes in this study. The electron emission was driven by a high voltage pulsed generator, which supplied150us pulses. The ferroelectric samples were put in the vacuum cell and the exerting voltage was perpendicular to the polar direction. The effects of the material parameters on the electron emission from ferroelectriccathode, such as the dielectric, piezoelectric and ferroelectric characteristics, were investigated. The dielectric constant and the remnant polarization as well as the piezoelectric constant are all decreased, afrer thesamples were tested by electron emission, this phenomenon is in conformity with the fast polarization theory.It has been proved that the emitted current densities can be increased as the electric properties of the materials are modified by doping. |
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| Keywords: | ferroelectric cathode emitted current densities dielectric parameters |
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