Effect of Barrier Materials on Discharge Properties in Air at Low Pressure  

作　　者：LIMing LI Cheng-rong ZHAN Hua-mao XU Jin-bao ZHANG Xian-jun 

机构地区：[1]Beijing Key Laboratory of High Voltage ~ EMC, School of Electric and Electronic Engineering, North China Electric Power University, Beijing 102206, China

出　　处：《高电压技术》2007年第12期80-84,共5页High Voltage Engineering

基　　金：Project Supported by National Natural Science Foundation of China(50537020,50507003);Specialized Research Fund for the Doc-toral Programof High Education of China(20050079006).

摘　　要：Dielectric barrier discharge(DBD) is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discharge.It is regarded as an available way to get atmospheric pressure glow discharge(APGD).In this paper,discharge forms with 4 different barrier materials(alumina,quartz,PTFE and PET) are investigated,and the transition of discharge form depending on the air pressure are recorded to estimate the influence of barrier materials on discharge.By using electrets as barrier materials,homogeneous discharges can be obtained in a more wide pressure range.Under the same experimental conditions,discharges with electrets are more uniform or have larger uniform areas due to the storage and desorption of charges on the surface of electrets.The electrons deposited in the surface layer can be released on next half cycle when the polarity of the applied voltage changes,and provide a number of seed electrons,which makes the discharge more homogeneous.The capacitance and the permittivity of barrier materials have no effect on the discharge form directly.Dielectric barrier discharge（DBD） is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discharge.It is regarded as an available way to get atmospheric pressure glow discharge（APGD）.In this paper,discharge forms with 4 different barrier materials（alumina,quartz,PTFE and PET） are investigated,and the transition of discharge form depending on the air pressure are recorded to estimate the influence of barrier materials on discharge.By using electrets as barrier materials,homogeneous discharges can be obtained in a more wide pressure range.Under the same experimental conditions,discharges with electrets are more uniform or have larger uniform areas due to the storage and desorption of charges on the surface of electrets.The electrons deposited in the surface layer can be released on next half cycle when the polarity of the applied voltage changes,and provide a number of seed electrons,which makes the discharge more homogeneous.The capacitance and the permittivity of barrier materials have no effect on the discharge form directly.

关 键 词：放电特性 低气压 电子跃迁 电介体 表面电荷 栅栏 

分 类 号：TM215[一般工业技术—材料科学与工程]