Thermal fluxes in a generator of low temperature plasma with a divergent channel of the outlet electrode

Isakaev, É. Kh.; Sinkevich, O. A.; Spector, Nissan; Tyuftyaev, A. S.; Tazikova, T. F.; Merkulov, V. V.

doi:10.1134/s0018151x11060137

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…Here, we might independently vary the component ratio in the plasma jet within wide ranges. Besides, the extending anode channel -the constructive peculiarity of the plasma torch -makes it possible to widely vary the rate of the vapor-gas flow cooling, to change its geometry, and, in general, to control the process efficiency [22]. Table 1 presents the parameters of experiments on the hydrogenated graphene synthesis.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Direct synthesis of hydrogenated graphene via hydrocarbon decomposition in plasmas

Shavelkina¹,

Амиров²

2019

Nanosystems: Phys. Chem. Math.

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We study graphene synthesis in a plasma-jet reactor. Graphene is obtained via decomposition of hydrocarbons in the plasma produced in the DC plasma torch. The products of synthesis are characterized using the following methods: electron microscopy, Raman spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy, thermal analysis and express-gravimetry. We make the conclusion that, at the few-layer graphene samples, their hydrogenation takes place. The maximal hydrogen-to-carbon ratio was 1:4.

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Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Direct synthesis of hydrogenated graphene via hydrocarbon decomposition in plasmas

Shavelkina¹,

Амиров²

2019

Nanosystems: Phys. Chem. Math.

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“…The synthesis of graphene has been investigated using a DC plasma torch with power of up to 40 kW with an expanding channel of the output electrode and the vortex stabilization of the arc [6,7]. A detailed description of the experimental setup was given in the study [8].…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Synthesis of high-purity multilayer graphene using plasma jet

Амиров¹,

Iskhakov²,

Shavelkina³

2016

Nanosystems: Phys. Chem. Math.

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A method to synthesize graphene materials using a DC high current divergent plasma torch has been developed. Carbon atoms were generated by the decomposition of propane-butane, methane and acetylene in a thermal plasma jet. The graphene materials were characterized by electron microscopy, thermogravimetry, Raman spectroscopy. The influence of the experimental conditions on the morphology and phase composition of the synthesis products was investigated. The optimal conditions for the synthesis of high-purity graphene flakes have been found.

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“…Such changes in the arc root position alter the arc column length and finally a fluctuation appears in the arc voltage with several characteristic frequencies. In addition, the amplitude of voltage fluctuations and the oscillation frequency are associated with the processes of elongation of the current filament and of the electric arc shunting to the anode wall [19,20]. But beyond all that, the steady state of the anodic arc root will reduce the life of the anodic electrode.…”

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confidence: 99%

Effect of an external magnetic field on plasma torch discharge fluctuation

Hu¹,

Wan²,

Xia³

et al. 2013

EPL

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The effect of an external magnetic field on the anodic arc root movement inside a dc plasma torch has been investigated. In this letter, a virtual instrument technology was used to measure the arc voltage of the plasma torch at atmospheric pressure, and the rotating frequency of the anodic arc root was estimated by high-speed photography. The arc voltage fluctuation which represents the degree of the arc instability was reduced. And a new peak, whose frequency is consistent with the rotating frequency of the anodic arc root, was found in the Fast Fourier Transform spectra of the arc voltage signal. From the results, the helical instability generated directly by anodic arc rotation is put forward, and only the appropriate external magnetic field could inhibit and reduce the instability of the plasma torch and prolong the life of the anodic electrode. Furthermore, the measured voltage waveforms indicated that the arc root attachment mode would be controllable by an external magnetic field.

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Thermal fluxes in a generator of low temperature plasma with a divergent channel of the outlet electrode

Cited by 6 publications

References 2 publications

Direct synthesis of hydrogenated graphene via hydrocarbon decomposition in plasmas

Direct synthesis of hydrogenated graphene via hydrocarbon decomposition in plasmas

Synthesis of high-purity multilayer graphene using plasma jet

Effect of an external magnetic field on plasma torch discharge fluctuation

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