PROCESSES OF FORMATION OF NANODISPERSE Al2O3 POWDERS WITH CARBON IN A DC ELECTRIC ARC

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