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Polymer foams with internally charged voids exhibit high piezoelectric activity combined with a high mechanical flexibility and compliance. This new class of materials (so-called ferroelectrets) has attracted considerable attention from science and industry. In order to render polymer foams electroactive, the inside voids must be charged by means of dielectric barrier discharges (DBDs) under high...
The electromagnetic radiation signal from dielectric barrier discharge in air at atmospheric pressure has been processed to investigate the electron density during the afterglow period. Experimental results show that many short-lived discharge filaments appear on the electrode of the surface discharge generator in air at atmospheric pressure. The number of the discharge filaments increases with increasing...
Summary form only given. It has been demonstrated recently that direct treatment of relatively smooth surfaces by non-thermal dielectric barrier discharge (DBD) in air is highly effective in killing bacteria and fungi. The key aspect of the direct treatment was shown to be contact with electrical charges. These results hold significant promise for medical applications of direct DBD such as sterilization...
Silicone rubber used for polymeric insulators has good hydrophobicity and recovery characteristic of it. CIGRE WG D1.14 aims to establish new test procedure, dynamic drop test. That can evaluate the property of hydrophobicity loss of silicone rubber easily and with small systems. So, we clarified the relation between processes of hydrophobicity deterioration or loss and leakage current waveform in...
Summary form only given. The results of experimental investigations of a volume avalanche discharge initiated by an e-beam (VADIEB) [1] and surface layer of Cu and AlBe foils modifications at the plasma action of VADIEB are given. The volume discharge in the air of atmosphere pressure formed in the gap with the cathode having small curvature radius and with high voltage pulses of nanosecond duration...
A rich variety of gas-discharge patterns have been observed in a specially designed dielectric-barrier discharge system with two liquid electrodes. The patterns presented here include square-lattice pattern, square-texture pattern, square-superlattice pattern, hexagonal superlattice state, multiarmed-spiral pattern, hollow-hexagonal pattern, and rotating-wheels pattern.
Different discharge mechanisms are possible for ESD (electrostatic discharge) below 2 kV breakdown voltage as a function of the parameters gap distance, breakdown voltage, electrode material and gas pressure. In this paper, risetime measurement data of electrostatic discharges, measured at about 8 GHz bandwidth, are presented as a function of these parameters. Electrode SEM photographs (scanning electron...
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