Extended Cylindrical Low-Pressure Arc Discharge Plasma Emitter for Generation of a Radially Diverging Electron Beam

2021 ◽  
Author(s):  
S. S. Kovalsky ◽  
V. V. Denisov ◽  
N. N. Koval ◽  
E. V. Ostroverkhov
Keyword(s):  
Electron Beam ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Low Pressure ◽  
Plasma Emitter

Magnetic State of the Nickel Oxide Nanoparticles Formed in Low-Pressure Arc Discharge Plasma

2021 ◽  
Vol 2021 (13) ◽  
pp. 1656-1660
Author(s):  
A. V. Ushakov ◽  
I. V. Karpov ◽  
L. Yu. Fedorov ◽  
V. G. Demin ◽  
E. A. Goncharova ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Discharge Plasma ◽  
Magnetic State ◽  
Arc Discharge ◽  
Low Pressure ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles

Synthesis of Metal-Organic Framework Structures Based on Copper in a Low-Pressure Arc Discharge Plasma

2020 ◽  
Vol 19 (05) ◽  
pp. 2050003
Author(s):  
I.V. Karpov ◽  
A.V. Ushakov
Keyword(s):  
Chemical Synthesis ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Metal Organic Framework ◽  
Low Pressure ◽  
Average Particle ◽  
Plasma Chemical ◽  
Plasma Chemical Synthesis ◽  
Metal Organic ◽  
Organic Framework

Plasma-chemical synthesis of nanopowders based on copper oxide and metal-organic framework structures was carried out using low-pressure arc discharge plasma. The study of the obtained material was carried out by several methods (XRD, FTIR, TEM, TGA and EIS). TEM showed that the obtained powder is highly agglomerated particles with an average particle size of 13 nm, and the crystalline ordering of nanoparticles with a large (about 2 nm) lattice parameter is clearly visible. XRD showed the presence of four crystalline phases corresponding to [Cu3 (BTC)2], Cu, Cu2O and CuO. XRD results are in good agreement with FTIR studies. The DTA curve demonstrates a continuous exothermic process associated with a number of features of plasma-chemical synthesis and the morphology of the obtained nanoparticles. The study of the electrochemical properties of the materials obtained by the method of impedance spectroscopy revealed an anomalous accumulation of electrical charges around the electrodes due to electrochemical reactions for [Cu3 (BTC)2], which are associated with various reactions involving copper species in the organic framework.

Physicochemical Properties of Zirconium Oxide Nanopowder Synthesized in Low-Pressure Arc Discharge Plasma

2020 ◽  
Vol 854 ◽  
pp. 51-56
Author(s):  
I.V. Karpov ◽  
Anatoly V. Ushakov ◽  
E.A. Goncharova ◽  
E.P. Bachurina ◽  
A.A. Shaikhadinov
Keyword(s):  
Physicochemical Properties ◽  
Zirconium Oxide ◽  
Discharge Plasma ◽  
Arc Discharge ◽  
Experimental Studies ◽  
Low Pressure ◽  
Narrow Particle Size Distribution ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Temperature Heating

The method for synthesis of zirconium oxide nanopowder in low-pressure arc plasma was developed. The physicochemical properties of the nanopowder were studied. The estimation was carried out by means of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The sequence and kinetics of structural transformations occurring in the specified time-temperature heating regimes have been examined using differential thermal analysis. It was shown that the particles have a nanometer size, a narrow particle size distribution and an amorphous-crystalline structure. The maximum specific surface area detected by the method of sorption of surfactants was 470 m2/g. The issues of crystallization were discussed. From comparison between the results of experimental studies from earlier works with the results obtained for zirconium oxide, it is concluded that the proposed method for producing NPs in a low-pressure arc discharge plasma is universal.

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