| 李森,唐波,马婷婷,张锡彦.化学通报,2018,81(9):858-863. |
| 高气压氮气介质阻挡放电激发态氮的实验研究（英文） |
| Pressure Influence on Excitation of Nitrogen in High-pressure Dielectric Barrier Discharge |
| 投稿时间：2018-03-31 修订日期：2018-05-17 |
| DOI： |
| 中文关键词: 光发射光谱学 等离子体 活性物种 电子密度 电子温度 激发反应 |
| 英文关键词:Optical emission spectroscopy, Plasma, reactive species, Electron density, Electron temperature, Excitation reactions |
| 基金项目:国家自然科学基金项目（51706023） |
|
| 摘要点击次数: 2209 |
| 全文下载次数: 0 |
| 中文摘要: |
| 本文通过等离子体发射光谱来研究高气压介质阻挡放电中压力对于激发态氮的影响。其中压力变化范围是0.1MPa到0.5MPa,不同能级的N2(C3Πu)是典型的活性物质。实验结果显示,随着实验气压增加,等离子体主体活性物质数密度从7×1015 cm-3 降至1×1015 cm-3。电子温度随着气压的增加从5eV降至3eV。电子数密度和气压的关系较为复杂,会受到中性分子和电子温度的影响。氮分子激发过程速率常数则随着压力增加近似线性减少,从6×10-16降至3×10-16 m3/s。实验结果显示,介质阻挡放电气压增加会显著减少活性物质数量、电子温度,同时近似线性减少氮分子激发过程速率常数。 |
| 英文摘要: |
| The pressure influence on excitation of nitrogen in high-pressure dielectric barrier discharge was investigated with optical emission spectroscopy analysis. The pressure ranges from 0.1 MPa to 0.5 MPa and the N2(C3Πu) on different levels are considered as the representative of reactive species. The results indicate that in bulk plasma the density of reactive species decreases from 7×1015 cm-3 to 1×1015 cm-3 in exponential movement with increase of pressure. The electron temperature decreases with decrease of pressure and ranges around 5 eV to 3 eV. The relationship between electron density and pressure is complex and affected by number of neutral species and electron temperature. The excitation rate constant decreases linearly with increase of pressure and ranges around 6×10-16~3×10-16 m3/s. Conclusion is the increase of pressure will effectively reduce the concentration of the reactive species, the electron temperature and the excitation rate constant. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |