Atmospheric Pressure Cold Plasma Device Based on High-Performance Ion-Exchange Microporous Zeolite Material
This study introduces the innovative application of a Na-modified ion-exchange microporous zeolite cathode (IEZC) aimed at optimising discharge characteristics in atmospheric pressure cold plasma devices (ZCPD). We demonstrate that the precise control of the Na+ cation concentration, which modulates resistivity from 1011 to 106 Ω·cm, serves as the primary mechanism for significantly reducing ignition voltage across a wide pressure range (8 to 760 Torr). Through an analysis of the interaction between the direct current (DC) plasma and the Na-modified dielectric surface, we present the first evidence of enhanced emission amplification and sustained discharge stability in ambient air, particularly at gap distances of 50–250 μm. These findings indicate that Na+ ion-exchange is a crucial factor in facilitating low-voltage, stable plasma generation, thereby providing a novel physical approach to improving microporous electrode performance.