scholarly journals Study on the Analysis of Restrike Pattern and Radial Spectrum of AC Arc Discharge based on the Electrode Material

2021 ◽  
Vol 35 (4) ◽  
pp. 58-64
Author(s):  
Jong-Min Lim ◽  
Chung-Seog Choi
Keyword(s):  
Electrode Material ◽  
Radiation Spectrum ◽  
Arc Discharge ◽  
Waveform Analysis ◽  
Carbon Electrodes ◽  
Half Cycle ◽  
Voltage Waveform ◽  
Copper Electrodes ◽  
Ac Arc ◽  
Ac Arc Discharge

In this study, we designed and fabricated a system based on IEC-62606 and UL-1699 such that stable arc discharge could be produced. AC arc discharge was performed to interpret the restrike pattern and radiation spectrum according to the electrode material. In the voltage waveform analysis of flat copper electrodes, it was analyzed that the accompaniment cycle of the negative waveform was more unstable than the half cycle of the positive waveform. We observed that the radiation spectrum of copper electrodes occurred in the ultraviolet and visible light regions. Moreover, the voltage waveform of the carbon electrode was found to be similar to the pattern produced by the copper electrode. However, we observed that the restrike generated at the half cycle of the negative waveform was produced relatively faster. The radio spectra were strongest near 589 nm, 671 nm, and 766 nm. AC arc discharges using copper electrodes and carbon electrodes were found to be between the arc-discharge patterns of copper electrodes and carbon electrodes. It has been proven that depending on the material of the electrode, there are differences in voltage list like, current patterns, and radiated spectra bands.

Production of medically useful nitric monoxide using AC arc discharge

Nitric Oxide ◽  
2018 ◽  
Vol 73 ◽  
pp. 89-95 ◽  
Author(s):  
S.R. Li ◽  
Y.F. Huang ◽  
Z. Liu ◽  
M.H. Sui ◽  
J.M. Liu ◽  
...  
Keyword(s):  
Arc Discharge ◽  
Ac Arc ◽  
Ac Arc Discharge ◽  
Nitric Monoxide

scholarly journals Growth of centimeter scale carbon wires using in-liquid AC arc discharge

2020 ◽  
Vol 2 (6) ◽  
Author(s):  
Krzysztof Jankowski ◽  
Agnes Ostafin ◽  
Mikołaj Tomasik ◽  
Tebello Nyokong ◽  
Jonathan Britton
Keyword(s):  
Arc Discharge ◽  
Ac Arc ◽  
Ac Arc Discharge

Structures and properties of Fe–C fine particles prepared by AC arc discharge

1999 ◽  
Vol 195 (2) ◽  
pp. 470-475 ◽  
Author(s):  
Jian Li ◽  
Cunye Liu ◽  
Baogang Zhao ◽  
Yaoqiang Lin ◽  
Zhaojing Deng
Keyword(s):  
Fine Particles ◽  
Arc Discharge ◽  
Structures And Properties ◽  
Ac Arc ◽  
Ac Arc Discharge

scholarly journals Carbon Nanostructures Production by AC Arc Discharge Plasma Process at Atmospheric Pressure

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Shenqiang Zhao ◽  
Ruoyu Hong ◽  
Zhi Luo ◽  
Haifeng Lu ◽  
Biao Yan
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Atmospheric Pressure ◽  
Carbon Nanostructures ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Plasma Process ◽  
Wide Range ◽  
Ac Arc ◽  
Ac Arc Discharge

Carbon nanostructures have received much attention for a wide range of applications. In this paper, we produced carbon nanostructures by decomposition of benzene using AC arc discharge plasma process at atmospheric pressure. Discharge was carried out at a voltage of 380 V, with a current of 6 A–20 A. The products were characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), and Raman spectra. The results show that the products on the inner wall of the reactor and the sand core are nanoparticles with 20–60 nm diameter, and the products on the electrode ends are nanoparticles, agglomerate carbon particles, and multiwalled carbon nanotubes (MWCNTs). The maximum yield content of carbon nanotubes occurs when the arc discharge current is 8 A. Finally, the reaction mechanism was discussed.

Modeling of the AC arc discharge on ice surfaces

1997 ◽  
Vol 12 (1) ◽  
pp. 325-338 ◽  
Author(s):  
M. Farzaneh ◽  
J. Zhang ◽  
X. Chen
Keyword(s):  
Arc Discharge ◽  
Ice Surfaces ◽  
Ac Arc ◽  
Ac Arc Discharge

scholarly journals Determination of hafnium in zirconium materials

2019 ◽  
Vol 85 (1II)) ◽  
pp. 56-59
Author(s):  
M. A. Dombrovskya ◽  
D. G. Lisienko ◽  
O. Yu. Shafar
Keyword(s):  
Arc Discharge ◽  
High Sensitivity ◽  
Analytical Signal ◽  
Graphite Powder ◽  
Atomic Emission ◽  
Relative Standard ◽  
Spectrum Excitation ◽  
Frequency Generator ◽  
Ac Arc ◽  
Ac Arc Discharge

An arc atomic emission technique of hafnium determination in zirconium is developed and tested. The study was carried out on a PGS-2 spectrometer equipped with MAÉS analyzer and information processing software «Atom 3.3». («VMK-Optoélektronika», Novosibirsk). Excitation of spectra of pre-oxidized metal was carried out using a medium-frequency generator «Vesuvius» («VMK-Optoélektronika», Novosibirsk). Analytical line of hafnium was free of spectral overlap with the lines of zirconium. We have set a current of the AC arc discharge (20 A), exposure time (30 sec) and the form of the electrode into which the sample is placed («narrow crater») are selected. The effect of buffering additives (graphite powder, bismuth fluoride) on the intensity of the analyte lines was studied. It is shown that high sensitivity of the analyte is observed for oxidized material without additives. Reduction of the random error attributed to the influence of conditions of spectrum excitation and sample preparation is achieved using the intensity ratio of the analyte line and zirconium as an analytical signal. Recommendations regarding preparation of the samples for calibration are given. The lower limit of the determined concentration is 0.01% with a relative standard deviation in repeatability 3%.

scholarly journals Study on Restriking Transient Voltage Characteristics and Waveform Patterns of Planar Copper-Carbon Electrodes using Forms

2020 ◽  
Vol 34 (4) ◽  
pp. 1-6
Author(s):  
Jong-Min Lim ◽  
Chung-Seog Choi
Keyword(s):  
Real Time ◽  
Electric Potential ◽  
Arc Discharge ◽  
Short Circuit ◽  
Carbon Electrodes ◽  
Radiation Patterns ◽  
Voltage Waveform ◽  
Measured Voltage ◽  
Maximum Current ◽  
Transient Voltage

In this study, the authors measured voltage and current waveforms in real time during a serial arc discharge. The analysis results of the arc discharge radiation patterns exhibited intermittent discharge, arc growth, creation of a heat generating area, occurrence of plume, and formation of a red heat area, which proceeded in that order. When the serial arc discharge was introduced, the current and voltage waveforms exhibited periodicity as sine waves. It was also observed that a restriking transient voltage occurred when the waveform changed from positive (+) to negative (-) and vice versa. When the discharge proceeded, the amount of heat generated for 1 s and 600 s was approximately 0.317 mJ, and 190 mJ, respectively. The duration of the short circuit was approximately 1.66 ms, and in the case of the voltage waveform, it was evident that the electric potential increased to 49.9 V in the same cycle. Furthermore, when the discharge proceeded, the effective value (RMS value) of the current was approximately 1.72 A with a maximum current of approximately 2.53 A, whereas the effective value of the voltage was approximately 42.8 V with a maximum of approximately 208 V.

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