SPECTRAL STUDIES OF THE PROCESSES OF ALUMINUM NANOPOWDER FORMATION EXPOSED BY SHORT SERIES OF TWIN LASER PULSES IN THE AIR ATMOSPHERE

Abstract

The processes of formation of oxidized nanopowders depending on the number of pulses were studied when double laser pulses with an energy of 52 mJ and an interpulse interval of 10 microseconds were applied to an aluminum target placed in a closed rectangular glass cuvette. It was found that the highest intensity of the Al III ion lines is observed at a small, about 15 pulses, consecutive double pulses in a series. The size of primary particles estimated by high-resolution electron microscopy was mainly 50-60 nm, and the particles were collected in agglomerates.

Keywords

• oxidized nanopowders al
• al2o3
• alo suboxides
• pulsed laser sputtering
• laser plasma
• laser spark spectrometry
• multicharged ions
• dual laser pulses