Polyhedral Graphite Particles Ambient Air Direct Current Arc Plasma Synthesis Supported by Molybdenum Catalyst

AbstractAn atmospheric pressure plasma jet is generated with a cold arc discharge in ambient air. The current-voltage characteristics and optical emission spectra of plasma discharges are investigated. The molecular nitrogen (N2), hydroxyl radical (OH), and oxygen atom (O) are observed and analyzed. Based on the best fit of the simulated spectra of N2 (C3∏u+ − B3∏g+) band and OH (A2∑+ − X2∏) band transition and the experimentally recorded spectra, the rotational temperature and the vibrational temperature of atmospheric pressure cold arc plasma jet (APCAPJ) are estimated.

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HRTEM analyses of the platinum nanoparticles prepared on graphite particles using coaxial arc plasma deposition

Journal of Nanoparticle Research ◽

10.1007/s11051-017-3895-6 ◽

2017 ◽

Vol 19 (6) ◽

Cited By ~ 10

Author(s):

Kun’ichi Miyazawa ◽

Masaru Yoshitake ◽

Yumi Tanaka

Keyword(s):

Platinum Nanoparticles ◽

Plasma Deposition ◽

Arc Plasma ◽

Graphite Particles

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Study on Two Plasma Physical Vapor Deposition Methods for Preparing Ultrafine Al Powders

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.81 ◽

2014 ◽

Vol 556-562 ◽

pp. 81-85

Author(s):

Qiong Yu ◽

Ming Li Li ◽

Song Ji ◽

Kun Ming Qian ◽

Yu Song Zhou

Keyword(s):

Particle Size ◽

Grain Size ◽

Direct Current ◽

Vapor Deposition ◽

Physical Vapor Deposition ◽

Arc Plasma ◽

Deposition Method ◽

Micro Structure ◽

Physical Vapor Deposition Method ◽

Better Than

Plasma physical vapor deposition method was most widely used to prepare ultrafine Al powders. Direct Current Arc Plasma (DCAP) and Radio Frequency Induction Plasma (RFIP) were adopted individually to produce Al powders with different particle size. The micro structure such as grain size, morphology and crystal phase was examined by SEM, TEM and XRD methods. The results show that the Al production by RFIP was better than by DCAP. DCAP has outstanding advantages in producing nanoAl powders with the particle size below 300nm while the RFIP is better to produce Al powders with the particle size 300nm to 1 μm.

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Получение керамики на основе карбида кремния из золошлаковых отходов

Письма в журнал технической физики ◽

10.21883/pjtf.2020.14.49661.18302 ◽

2020 ◽

Vol 46 (14) ◽

pp. 21

Author(s):

А.Я. Пак ◽

В.Е. Губин ◽

Г.Я. Мамонтов

Keyword(s):

Silicon Carbide ◽

Direct Current ◽

Final Stage ◽

Analytical Methods ◽

Arc Discharge ◽

Ambient Air ◽

Powder Product ◽

Three Stages ◽

Sintering Method ◽

Carbon Plasma

The paper shows the possibility of obtaining bulk samples of solid ceramics based on silicon carbide obtained from ash waste. The process is implemented in three stages: the initial ash waste was treated with a carbon plasma of a direct current arc discharge under ambient air conditions using a vacuumless method, then the obtained powder material was purified from unbounded carbon in an atmospheric furnace, and at the final stage the powder product was sintered by the plasma spark sintering method. According to analytical methods, the result is a ceramic based on silicon carbide with a density of 3.05 g/cm3 and a hardness of up to 19.9 GPa.

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