Study of Dielectric Barrier Townsend Discharge in 3-mm Air Gap at Atmospheric Pressure

Luo, Haiyun; Li, Kai; Ran, Junxia; Yang, Yue; Wang, Xinxin; Yap, S. L.; Wong, C. S.

doi:10.1109/tps.2014.2312543

Cited by 24 publications

(9 citation statements)

References 11 publications

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“…However, in this study, a more uniform glow or glow-like discharge phenomenon is obviously observed in atmospheric air, and the steady gap voltage is about 4.67 kV, which is lower than the parallel-plate electrode and wire-plate electrode under the same conditions. It is also much lower than the static breakdown voltage (11.2 kV) in 3 mm air gap calculated from the Paschen curve [6,25]. This fully proves that the predischarge of carbon fibre helical-contact electrode and the electric field intensity with gradual change have great influence on the discharge process.…”

Section: Results and Discussion -mentioning

confidence: 59%

“…In order to avoid the filamentary discharge (streamer formation) at high pressure, according to the theory of gas discharge, it is necessary to control the development of electron avalanches to prevent them from growing rapidly, so inhibiting the production of secondary electrons using a dielectric barrier discharge (DBD), it is relatively easy to generate atmospheric pressure homogeneous discharge (APHD) plasma in some special conditions, such (a) E-mail: zhaoshuai@aoe.ac.cn (corresponding author) (b) E-mail: wshcui@szu.edu.cn as rare gases, radiofrequency, special barrier materials and so on [6][7][8][9].…”

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confidence: 99%

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Study on the atmospheric pressure homogeneous discharge in air assisted with a floating carbon fibre microelectrode

Zhao¹,

Hao²,

Qiao³

et al. 2020

EPL

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Based on the consideration of increasing the number of initial electrons and providing an appropriate distribution of electric field strength for discharge space, a method of adopting the wire-cylindrical type electrode structure with a floating carbon fibre electrode to achieve atmospheric pressure homogeneous discharge (APHD) in air is proposed in this paper. Studies of the electrode characteristics show that this structure can make full use of the microdischarge process of the carbon fibre microelectrode and the good discharge effect of the helical electrode to provide plenty of initial electrons for the discharge space. Besides, the non-uniform electric field distribution with gradual change leads to the slow growth of electron avalanches in this structure. Thus, the initial discharge voltage can be reduced and the formation of filamentary discharge channels can be inhibited, which provides theoretical possibilities for the homogeneous discharge in atmospheric air. Experiments show that a three-dimensional uniform discharge phenomenon can be realized under a 6.0 kV applied voltage in a PFA tube of 6 mm inner diameter, displaying good uniformity and large scale.

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Section: Results and Discussion -mentioning

confidence: 59%

mentioning

confidence: 99%

Study on the atmospheric pressure homogeneous discharge in air assisted with a floating carbon fibre microelectrode

Zhao¹,

Hao²,

Qiao³

et al. 2020

EPL

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“…The discharge mode was filament discharge, as shown in Fig. 1B (32). In this case, sterilization can be achieved in 5 min.…”

Section: Resultsmentioning

confidence: 99%

Sterilizing Processes and Mechanisms for Treatment of Escherichia coli with Dielectric-Barrier Discharge Plasma

Wang

Zhang

Luo

et al. 2019

Appl Environ Microbiol

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With increasing attention toward novel sterilization methods, plasma sterilization has gained more and more interest. However, the underlying mechanisms are still unknown. In this paper, we investigated the inactivation of Escherichia coli using dielectric-barrier discharge (DBD) plasma in saline water. There were three processes shown in the survival curve, namely, during the preparation period, the reaction period, and the saturation period. Observations under a transmission electron microscope (TEM) and detection by Fourier transform infrared spectroscopy (FT-IR) supplied adequate details regarding these processes. Based on these results, we infer that during the preparation period, the main process is the accumulation of chemical substances. During the reaction period, adequate amounts of chemicals decompose and denature cell membranes and macromolecules to kill bacteria in large quantities. During the saturation period, the killing effect decreases because of the protection by clustered cells and the saturation of pH. This study of sterilizing processes systematically reveals the mechanisms of plasma sterilization. IMPORTANCE Compared with traditional methods, plasma sterilization has advantages of high efficiency, easy operation, and environmental protection. This may be more suitable for air and sewage sterilization in specific spaces, such as hospitals, laboratories, and pharmaceutical factories. However, the mechanisms of sterilization are still relatively unknown, especially for bactericidal activities. Knowledge of sterilization processes provides guidance for practical applications. For example, the bactericidal action mainly occurs during the reaction period, and the treatment time can be set based on the reaction period, which could save a lot of energy. The results of this study will help to improve the efficiency of plasma sterilization devices.

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“…In recent years, some researchers have achieved small‐gap glow discharge in air under atmospheric pressure by nanosecond pulse discharge and using microporous ceramic dielectric barrier materials . However, when using these gap discharge structures to treat materials, the electrodes are located on both sides of the materials.…”

Section: Introductionmentioning

confidence: 99%

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

Zhao

Liu

et al. 2019

Plasma Processes & Polymers

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A method of forming large‐area glow discharge plasmas with good diffusivity in atmospheric air based on the composite network‐surface laminated electrode structure with multiple potentials is proposed. This method can enhance the intensity of the space electric field and generate glow discharge plasma under the condition that the voltage is lower than 1 kV. Through the alternating electric field, the charged particles diffuse from the surface of the electrode to the space to enhance the treatment of aramid fabric. According to the changes of surface morphology, contact angle and surface energy of aramid fabric, it can be seen that the surface roughness and surface energy of the material treated by plasma are significantly improved. After 30 s of treatment, the contact angle decreases by 83.85° and the surface energy increases 3.4 times. This method has the advantages of low discharge voltage, good discharge uniformity, good material treatment effect, and so forth. It has good application prospects for the industrialization of aramid fabric surface modification with high efficiency.

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Study of Dielectric Barrier Townsend Discharge in 3-mm Air Gap at Atmospheric Pressure

Cited by 24 publications

References 11 publications

Study on the atmospheric pressure homogeneous discharge in air assisted with a floating carbon fibre microelectrode

Study on the atmospheric pressure homogeneous discharge in air assisted with a floating carbon fibre microelectrode

Sterilizing Processes and Mechanisms for Treatment of Escherichia coli with Dielectric-Barrier Discharge Plasma

Study on atmospheric air glow discharge plasma generation based on multiple potentials and aramid fabric surface modification

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