Discharge-Mode Transition in Jet-Type Dielectric Barrier Discharge Using Argon/Acetone Gas Flow Ignited by Small Helium Plasma Jet
Discharge-Mode Transition in Jet-Type Dielectric Barrier Discharge Using Argon/Acetone Gas Flow Ignited by Small Helium Plasma Jet
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DOI：
10.1143/jjap.50.116002
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发表时间：
2011-10
影响因子：
1.5
通讯作者：
K. Urabe;Keitaro Yamada;O. Sakai
中科院分区：
文献类型：
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作者：
K. Urabe;Keitaro Yamada;O. Sakai
喷射式介质阻挡放电(DBD)中的放电模式转变是在大气压下向Ar气流中加入一小部分丙酮蒸汽而触发的。为了在较小的外加电压下触发Ar/丙酮气流中的稳定放电，我们使用了一个附加的小等离子体射流，在主气流一侧使用He气流。当丙酮-蒸汽比增加时，从丝状放电模式到辉光放电模式的转变发生，丙酮含量约为0.3vol%时发生转变。我们比较了每种放电模式下的放电电流、光发射光谱和衬底上沉积的材料，以表征放电现象。实验结果表明，喷射式DBD的特性对丙酮-蒸汽比表现出非线性的依赖关系，特别是在向放电模式的转变附近。显微观察还发现，在丝状和类辉光模式下，沉积材料的表面形貌完全不同。
A discharge-mode transition in a jet-type dielectric barrier discharge (DBD) was triggered by a small fraction of acetone vapor added to an argon (Ar) gas flow at atmospheric pressure. In order to trigger a stable discharge in the Ar/acetone gas flow with a relatively small applied voltage, we used an additional small plasma jet using a He gas flow on the side of the main flow. The transition from filamentary to glow like discharge modes took place upon increasing the acetone-vapor ratio, with the transition occurring at an acetone content of approximately 0.3 vol %. We compared discharge currents, optical emission spectra, and deposited materials on the substrate in each discharge mode to characterize the discharge phenomena. The experimental results clearly indicate that the characteristics of the jet-type DBD show nonlinear dependence on the acetone-vapor ratio, especially around the transition to the discharge mode. It was also found by microscopic observations that the surface morphologies of the deposited materials were completely different in the filamentary and glow like modes.