光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2013年
11期
2903-2906
,共4页
董丽芳%张超%张新普%赵龙虎
董麗芳%張超%張新普%趙龍虎
동려방%장초%장신보%조룡호
介质阻挡放电%斑图%分子振动温度%电子激发温度
介質阻擋放電%斑圖%分子振動溫度%電子激髮溫度
개질조당방전%반도%분자진동온도%전자격발온도
Dielectric barrier discharge%Pattern%Molecular vibration temperature%Electron excitation temperature
采用发射光谱法，首次研究了等离子体参数及激发状态对介质阻挡放电六边形斑图稳定性的影响。在氩气/空气混合气体的介质阻挡放电中，随着电压的升高，放电丝直径增大，六边形斑图逐渐稳定，同时放电颜色由紫色逐渐变为灰白色，说明其等离子体状态及参数可能发生了变化。测量了六边形斑图放电过程中氮分子谱线和氩原子谱线相对于氩原子763.51 nm的相对强度、分子振动温度和电子激发温度随外加电压的变化。结果发现：氮分子谱线相对强度随电压增加而降低，氩原子谱线相对强度却升高；分子振动温度与电子激发温度均随电压增加而增大。这些现象表明：随着电压增大，电子能量增加。由此，氩原子激发增多，放电丝直径增大，介质表面上沉积的壁电荷面积增大，放电丝之间的相互作用增强，六边形斑图趋于稳定。
採用髮射光譜法，首次研究瞭等離子體參數及激髮狀態對介質阻擋放電六邊形斑圖穩定性的影響。在氬氣/空氣混閤氣體的介質阻擋放電中，隨著電壓的升高，放電絲直徑增大，六邊形斑圖逐漸穩定，同時放電顏色由紫色逐漸變為灰白色，說明其等離子體狀態及參數可能髮生瞭變化。測量瞭六邊形斑圖放電過程中氮分子譜線和氬原子譜線相對于氬原子763.51 nm的相對彊度、分子振動溫度和電子激髮溫度隨外加電壓的變化。結果髮現：氮分子譜線相對彊度隨電壓增加而降低，氬原子譜線相對彊度卻升高；分子振動溫度與電子激髮溫度均隨電壓增加而增大。這些現象錶明：隨著電壓增大，電子能量增加。由此，氬原子激髮增多，放電絲直徑增大，介質錶麵上沉積的壁電荷麵積增大，放電絲之間的相互作用增彊，六邊形斑圖趨于穩定。
채용발사광보법，수차연구료등리자체삼수급격발상태대개질조당방전륙변형반도은정성적영향。재아기/공기혼합기체적개질조당방전중，수착전압적승고，방전사직경증대，륙변형반도축점은정，동시방전안색유자색축점변위회백색，설명기등리자체상태급삼수가능발생료변화。측량료륙변형반도방전과정중담분자보선화아원자보선상대우아원자763.51 nm적상대강도、분자진동온도화전자격발온도수외가전압적변화。결과발현：담분자보선상대강도수전압증가이강저，아원자보선상대강도각승고；분자진동온도여전자격발온도균수전압증가이증대。저사현상표명：수착전압증대，전자능량증가。유차，아원자격발증다，방전사직경증대，개질표면상침적적벽전하면적증대，방전사지간적상호작용증강，륙변형반도추우은정。
The effect of plasma parameters and excited states on the stable process of the hexagon pattern in a dielectric barrier discharge was studied by using optical emission spectra .It was found that the diameter of the discharge filament increases ,the pattern gets more stable ,and the color of the pattern changes from purple to gray with the increase in the voltage in dielectric barrier discharge in argon and air mixture .It indicates that the plasma excited states and parameters may be changed .To this end ,the relative intensity of N2 and Ar spectral lines with respect to Ar Ⅰ 763.51 nm ,the molecular vibration temperature ,and the electron excitation temperature were measured with the change in the applied voltage .The results show that the relative in-tensity of N2 spectral lines decreases and that of Ar spectral lines increases with the increase in the voltage .And both the molec-ular vibration temperature and the electron excitation temperature increase .These phenomena indicate that the electron energy increases with the increase in the voltage .The increase of the stimulated argon atoms excited by higher energy electron leads to the increase in the diameters of the discharge filaments .Correspondingly ,the areas of the wall charges deposited on the dielectric increase ,which results in the enhancement of the interactions between filaments ,and therefore the hexagon pattern becomes sta-ble .
