Vaporization mechanism from Sn–Ag mixture by Ar–H2 Arc for nanoparticle preparation

Tanaka, Manabu; Watanabe, Takayuki

doi:10.1016/j.tsf.2007.11.096

Cited by 41 publications

(16 citation statements)

References 12 publications

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“…Similar tendency was observed in Sn-Ag mixture 7) . It was shown that this phenomenon can not be explained by only "hydrogen plasma-metal reaction" model.…”

Section: Introductionsupporting

confidence: 85%

Influence of Hydrogen Induced Thermal Pinch on Nanoparticle Formation in Arc Plasma

Noma

Abe

Naito

et al. 2009

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Fe nanoparticles were prepared by DC arc plasma method under Ar, Ar-50%H 2 or H 2 flow. The arc plasma was well constricted due to thermal pinch effect when Ar-50%H 2 or H 2 was used, and the generation ration of the Fe nanoparticles was significantly enhanced with the pinched arc. Our numerical simulation indicated that the Fe anode can be efficiently heated (close to boiling point of Fe) due to the thermal pinch effect, and thereby the generation ratio can be increased. Since the thermal pinch effect enhanced the arc flow velocity as well, the size of the resulting Fe nanoparticles was also influenced.

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“…Similar tendency was observed in Sn-Ag mixture 7) . It was shown that this phenomenon can not be explained by only "hydrogen plasma-metal reaction" model.…”

Section: Introductionsupporting

confidence: 85%

Influence of Hydrogen Induced Thermal Pinch on Nanoparticle Formation in Arc Plasma

Noma

Abe

Naito

et al. 2009

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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“…After the arc ignition, metal fume was formed from the surface of the raw material. The nanoparticles grow after nucleation, coagulation, and collision [ 5 ]. There was no gas circulation during the experiment.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, a high purity nanoparticle can be continuously produced. The DC arc plasma has been used for the synthesis of various nanomaterials, such as carbon [ 1 , 2 , 3 ], alloy [ 4 , 5 ], oxide [ 6 , 7 ], intermetallic compound [ 8 ], and high-purity metal nanopowders [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nickel Nanoparticles by Direct Current Arc Discharge Method and Their Catalytic Application in Hybrid Na-Air Battery

Qiu

Liang

et al. 2018

Nanomaterials

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Nickel nanoparticles were prepared by the arc discharge method. Argon and argon/hydrogen mixtures were used as plasma gas; the evaporation of anode material chiefly resulted in the formation of different arc-anode attachments at different hydrogen concentrations. The concentration of hydrogen was fixed at 0, 30, and 50 vol% in argon arc, corresponding to diffuse, multiple, and constricted arc-anode attachments, respectively, which were observed by using a high-speed camera. The images of the cathode and anode jets were observed with a suitable band-pass filter. The relationship between the area change of the cathode/anode jet and the synchronous voltage/current waveform was studied. By investigating diverse arc-anode attachments, the effect of hydrogen concentration on the features of nickel nanoparticles were investigated, finding that 50 vol% H2 concentration has high productivity, fine crystallinity, and appropriate size distribution. The synthesized nickel nanoparticles were then used as catalysts in a hybrid sodium–air battery. Compared with commercial a silver nanoparticle catalyst and carbon black, nickel nanoparticles have better electrocatalytic performance. The promising electrocatalytic activity of nickel nanoparticles can be ascribed to their good crystallinity, effective activation sites, and Ni/NiO composite structures. Nickel nanoparticles prepared by the direct current (DC) arc discharge method have the potential to be applied as catalysts on a large scale.

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“…This study clarifies the correlation between those two physics using a timedependent 2D axisymmetric simulation. The present growth-transport model expresses Using arc plasma, Tanaka and Watanabe [9] conducted an experimental investigation of Sn-Ag alloy nanoparticle formation in a system. Other experiments related to fume generation in arc welding have been conducted mostly for purposes of detoxification and reduction of fume particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Correlation between Arc Plasma Fluctuation and Nanoparticle Growth–Transport under Atmospheric Pressure

2019

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A time-dependent two-dimensional (2D) axisymmetric simulation was conducted for arc plasma with dynamically fluctuating fluid generating iron nanoparticles in a direct-current discharge condition. The nonequilibrium process of simultaneous growth and transport of nanoparticles is simulated using a simple model with a low computational cost. To ascertain fluid dynamic instability and steep gradients in plasma temperature and particle distributions, a highly accurate method is adopted for computation. The core region of the arc plasma is almost stationary, whereas the fringe fluctuates because of fluid dynamic instability between the arc plasma and the shielding gas. In the downstream region, the vapor molecules decrease by condensation. The nanoparticles decrease by coagulation. These results suggest that both of the simultaneous processes make important contributions to particle growth. The fluctuation of nanoparticle number density in a distant region exhibits stronger correlation with the temperature fluctuation at the plasma fringe. The correlation analysis results suggest that the distribution of growing nanoparticles distant from the arc plasma can be controlled via control of temperature fluctuation at the arc plasma fringe.

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Vaporization mechanism from Sn–Ag mixture by Ar–H2 Arc for nanoparticle preparation

Cited by 41 publications

References 12 publications

Influence of Hydrogen Induced Thermal Pinch on Nanoparticle Formation in Arc Plasma

Influence of Hydrogen Induced Thermal Pinch on Nanoparticle Formation in Arc Plasma

Preparation of Nickel Nanoparticles by Direct Current Arc Discharge Method and Their Catalytic Application in Hybrid Na-Air Battery

Numerical Analysis of the Correlation between Arc Plasma Fluctuation and Nanoparticle Growth–Transport under Atmospheric Pressure

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