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Generation of homogeneous glow discharge using a combination of fine wire mesh perforated aluminium alectrode

机译:使用细金属丝网穿孔的铝电极的组合产生均匀的辉光放电

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摘要

Nowadays, a gas discharge plasma applications has rapidly extended due to the greatest chemical freedom offered by the non-equilibrium aspects of the plasma. Among the applications of gas discharge plasma are surface treatment, air pollution control, lasers, lighting, plasma displays, ozone generation and biomedical applications. The most commonly used in plasma industry is the glow discharge plasma. It is known to be generated under high vacuum condition. At low pressure glow discharge plasma, the producing of surfaces and thin films are more effectives and good quality. But, this technique gives disadvantages due to the large cost to maintain at low pressure condition. However, there were many researches that have been done to produce glow discharge at atmospheric pressure. This glow discharge can be stabilize at atmospheric pressure if three simple requirements are fulfilled: (i) use of source frequency of over 1 kHz, (ii) insertion of a dielectric plates between the two metal electrodes, (iii) use of helium dilution gas. Used of helium gas is impractical due to its high cost. In order to generate glow discharge at atmospheric pressure in any gases, it was found that fine wire mesh and perforated aluminium can maintain a stable glow discharges. This thesis focus on the production of homogeneous glow discharge by using a combination of fine wire mesh and perforated aluminium as electrodes. A study was also made to determine the effect of a frequency and gap spacing on the stability of glow discharge
机译:如今,由于等离子体的非平衡方面带来的最大化学自由度,气体放电等离子体的应用已迅速扩展。气体放电等离子体的应用包括表面处理,空气污染控制,激光,照明,等离子体显示器,臭氧产生和生物医学应用。等离子工业中最常用的是辉光放电等离子体。已知它是在高真空条件下产生的。在低压辉光放电等离子体下,表面和薄膜的产生更有效且质量更好。但是,由于在低压条件下维持的成本较高,因此该技术具有缺点。但是,已经进行了许多研究来在大气压下产生辉光放电。如果满足三个简单要求,则该辉光放电可以在大气压下保持稳定:(i)使用超过1 kHz的源频率;(ii)在两个金属电极之间插入电介质板;(iii)使用氦稀释气体。由于氦气成本高,因此不实用。为了在大气压下在任何气体中产生辉光放电,发现细金属丝网和带孔的铝可以保持稳定的辉光放电。本文的重点是通过使用细金属丝网和穿孔铝作为电极的组合来产生均匀的辉光放电。还进行了一项研究以确定频率和间隙间距对辉光放电稳定性的影响

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    Sahari Norain;

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  • 年度 2013
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  • 正文语种 en
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