Electrochemical-and Spectroscopic-Fundamental Study on Condensed Plasma System

本课题取得的主要成果如下：这个项目的另一个成果是《等离子体与离子》杂志的出版。由于“凝聚等离子体”反应在概念上的重要性，本项目负责人首先提出了该反应，并在本项目中进行了成核和构建，并在日本（1998年9月，小仓）和中国举行的国际会议上得到了好评。（1998年10月，西安）发现了N^<3->离子氧化和NO_3-离子还原都可以在金属钛电极上合成TiN化合物的新事实。这些在凝聚等离子体反应中得到的结果可以用于合成其他各种金属氮化物，如FeNx。ZrN.WN.NbN…3。通过XPS和拉曼光谱分析，在第二级化合物表面覆盖了平面片状氟化石墨，使氟化砷酸石墨不受空气中水分的侵蚀。电化学测量结果表明，Pd-LI合金的吸氢能力大于金属Pd.4。尝试改进直流放电电解电路，使其稳定，可生产金属细粉末，有望成为金属粉末生产的新方法。采用直流电弧等离子体射流形成了一层厚度为100 ~ 200 μ m的氮化化合物薄膜。x射线显微衍射图和扫描电镜显示，表面有3种不同的相，其厚度与等离子体气体的N2/H2比密切相关。等离子体火焰在300 ~ 800 μ m波长范围内的光谱分析表明，NH自由基和H自由基种类在合成反应中起着重要作用。利用落轴仪研究了重力对凝聚等离子体反应中沉积金属形貌的影响，对比了有重力和无重力电沉积微晶的SEM图像，发现重力对金属沉积的成核或生长速率有一定的影响。少

The main results obtained by this project are as follows. And also one of another fruits of this project was a publication of journal named "Plasmas & Ions". It has been introduced due to the importance in the conception as the "Condensed Plasma" reaction which was firstly proposed by the head investigator in this project, was nucleated and constructed in this project and has been given the exellent appraise at the International Conference in Japan (Sept., 1998, Kokura) and China. (Oct., 1998 at Xian)2. A new fact that both the oxidation of N^<3-> ion and reduction of NO_3- ion can sythesize a TiN compound on metallic Ti electrode was found. And these results in condensed plasma reaction can introduce to synthesize the various other metallic nitrides such as FeNx. ZrN.WN.NbN..3. By means of XPS and Ramman spectroscopy, a second stage compound was covered with planar-sheet graphite fluoride which can protect the bulk graphite fluoroarsenates from the attack of moisture in air.3. It was … More cleared after the electrochemical measurments that a capacity of hydrogen absorbability in Pd-LI alloy was larger than metallic Pd.4. An attempt of DC discharging electrolysis improved in their circuit to be stable can produce metallic fine powder and expected to be a new method for metallic powder production.5. A thick nitride compound film with 100 - 200 mum was formed by a DC arcc plasma jet. X-ray micro-diffraction pattern and SEM microscopy revealed 3 different phases on the surface whose thickness were strongly depend on plasma gas ratio of N2/H2. By the spectroscopy of plasma flame in the range of 300 - 800 mum wave length, NH radical and H radical species were playing an important role in the synthesizing reaction.6. Effects of gravity on deposited metal morphology in the condensed plasma reaction were examined using drop shaft apparatus in JAMIC, the gravity has a certain effects on nucleation or growth rate in metallic deposition after comparing the SEM images of microcrystals electrodeposited with and without gravity. Less