Processes of formation of nanodisperse Al₂O₃ powders with carbon in a dc electric arc

N.A. Alekseenko¹, M. N. Kovalenko², L. V. Markova¹, A. P. Zajogin¹

¹Powder Metallurgy Institute named after academician O. V. Roman, Minsk, Belarus
²Belarusian State University, Minsk, Belarus

DOI: 10.26456/pcascnn/2020.12.758

Abstract: The nanodisperse Al₂O₃ powders formation with carbon in a DC electric arc under the influence of an arc discharge between an D16T aluminum alloy electrode and a carbon electrode in the air atmosphere are studied. The effect of the arc current on the plasma-arc synthesis of an aluminum-carbon material, a precursor for production of hollow Al₂O₃ nanoparticles, was studied. It is found that with an increase in the arc current from 4 to 14 A, the amount of product increases by almost an order of magnitude, despite competing dissociation processes with an increase in temperature from 5000 to 5500 К.

Keywords: Al₂O₃ , AlO  suboxides, DC electric arc, arc temperature, temperature of the area of formation of aluminum suboxides.

Bibliography link:

Alekseenko, N.A. Processes of formation of nanodisperse Al₂O₃ powders with carbon in a dc electric arc / N.A. Alekseenko, M. N. Kovalenko, L. V. Markova, A. P. Zajogin // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – 2020. – I. 12. – P. 758-764. DOI: 10.26456/pcascnn/2020.12.758. (In Russian).

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