CAJ | 학술논문

大气压液体电极放电是近年来兴起的一种产生大气压等离子体的新方法，此方法因为结构简单、成本低廉、操作方便等优点而具有广泛的应用前景。为此，采用水平面为放电阴极、金属棒为放电阳极，产生了大气压辉光放电等离子体；试验测量了放电等离子体的伏安特性，表明放电发生在反常辉光放电模式，在40～100mA范围内，随着放电电流的增加，放电越来越强烈；分析了阴极尺寸对放电伏安特性的影响，发现较小的阴极表面积需要更高的放电电压，并且微分电阻更大，对比了阳极直径对放电伏安特性的影响，发现较小的阳极直径需要更高的放电电压但是放电更加稳定；讨论了溶液pH值对放电等离子体阴极位降的影响，结果显示，降低溶液的pH值能够有效降低等离子体的阴极位降；试验研究了溶液pH值随放电时间的变化，研究结果表明，随着放电时间的增加，液体阴极的pH值降低，说明放电后溶液中有酸性物质产生。该研究成果对液体阴极放电等离子体的机理研究具有一定的指导意义。
대기압액체전겁방전시근년래흥기적일충산생대기압등리자체적신방법，차방법인위결구간단、성본저렴、조작방편등우점이구유엄범적응용전경。위차，채용수평면위방전음겁、금속봉위방전양겁，산생료대기압휘광방전등리자체；시험측량료방전등리자체적복안특성，표명방전발생재반상휘광방전모식，재40～100mA범위내，수착방전전류적증가，방전월래월강렬；분석료음겁척촌대방전복안특성적영향，발현교소적음겁표면적수요경고적방전전압，병차미분전조경대，대비료양겁직경대방전복안특성적영향，발현교소적양겁직경수요경고적방전전압단시방전경가은정；토론료용액pH치대방전등리자체음겁위강적영향，결과현시，강저용액적pH치능구유효강저등리자체적음겁위강；시험연구료용액pH치수방전시간적변화，연구결과표명，수착방전시간적증가，액체음겁적pH치강저，설명방전후용액중유산성물질산생。해연구성과대액체음겁방전등리자체적궤리연구구유일정적지도의의。
Using water as the cathode, and a metal rod as the anode, we set up an atmospheric pressure direct-current water-cathode glow discharge apparatus, and measured the volt-ampere characteristics of water cathode discharge at several gap distances, showing that abnormal glow discharge appeared. The discharge potential remark- ably increased with current from 40 mA to 100 mA. The influence of cathode surface size on the volt-ampere characteristics of discharge was analyzed. The experimental results show that, capillary cathode discharge needs higher discharge voltage, and has higher differential resistance. The effect of anode diameters and solution pH on plasma is discussed. The results show that, discharge of the shorter diameter of metal rod is more stable and the increase of solution pH leaded to the decrease of cathode fall. The pH of solution after discharge is also investigated, and the results show that the pH of solution is obviously reduced after discharge, implying acidic components are produced in the solution.