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Proceedings Paper

Synthesis of nanopowders with a help of powerful CO2 laser
Author(s): V. V. Osipov; V. V. Lisenkov; V. V. Platonov
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Paper Abstract

The paper reports about the results of researches of nanopowder production with a help powerful repetitively pulsed CO2 laser "LAERT" which generated radiation with pulse energy of ≈1 J, peak power of ≈8 kW and mean power of 500 W. Laser radiation affected and evaporated the target. The target material vapor condensed into nanoparticles as a result of intermixing vapor with a flow of cold gas. In basic the air of atmospheric pressure was used as the carrier gas. However in some experiments were used He and Ar and the gas pressure also was changed. In our experiments we produced nanopowders of such materials as: YSZ, YSZ:Al2O3, Al2O3, CeO2:Gd2O3, 0.5%Nd:Y2O3, 1%Nd:YAG, Fe3O4and carbon with a middle size 10÷30 nm. Received nanopowders were also weakly agglomerated. We carried out 3D numerical modeling of thermo-hydrodynamic processes occurred during the laser evaporation of a target. Results of calculations have cleared up many details of target evaporation. In particular, influence of liquid melt movement on stoichiometry of evaporation of a target from oxide mixes is found out. Results of calculations are in a good agreement with experimental data.

Paper Details

Date Published: 17 February 2011
PDF: 8 pages
Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941V (17 February 2011); doi: 10.1117/12.879899
Show Author Affiliations
V. V. Osipov, Institute of Electrophysics (Russian Federation)
V. V. Lisenkov, Institute of Electrophysics (Russian Federation)
V. V. Platonov, Institute of Electrophysics (Russian Federation)

Published in SPIE Proceedings Vol. 7994:
LAT 2010: International Conference on Lasers, Applications, and Technologies
Vladislav Panchenko; Gérard Mourou; Aleksei M. Zheltikov, Editor(s)

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