不同电介质结构下介质阻挡放电特性研究

设计制作了单面有氧化铟锡(ITO)导电介质层的双玻璃介质层的介质阻挡放电装置,研究了其放电特性,并将其与双玻璃介质层和单玻璃介质层的介质阻挡放电进行了比较.从电荷输运的角度分析,上述三种装置分别实现了电荷的二维、零维和三维输运.采用两种不同的双玻璃介质层装置,获得了单个稳定的放电丝.与无ITO导电层的双玻璃结构得到的单个放电丝相比,单面有导电ITO介质的双玻璃结构中,单放电丝呈"T"字型,其光晕是前者光晕的2倍,其放电电流大于前者电流,其放电时间间隔长短交替现象更为明显,且存在强度大小交替的现象.分析表明,壁电荷输运及二次电子发射的不同导致了不同电介质结构放电特性的不同. 关键词： 介质阻挡放电 壁电荷 二次电子发射

Characteristics of dielectric barrier discharge with different dielectric layer structures

A dielectric barrier discharge device with two glass dielectric layers, one of which is covered with an indium tin oxide (ITO) conductive layer, was designed. Its discharge characteristics was studied and compared with that in dielectric barrier discharge devices with two glass dielectric layers and single glass layer. The charge transport in two dimensions, zero dimension, and three dimensions were realized by the above three devices respectively. Single steady filament is obtained in the two devices with two glass layers. Different from the single filament obtained in the device with two glass dielectric layers without ITO conductive layer, the single filament obtained by using the device of two glass dielectric layers with ITO conductive layer in one side was "T" shapes, its halo was twice as much as that of the former, its current was greater, and the phenomenon of discharge interval changing alternatively between long and short was more evident. Moreover, the discharge intensity also varied alternatively between strong and weak. The analysis indicated that the differences of the wall charge transport and secondary electron emission between different dielectric structures lead to different discharge characteristics.