Synthesis of nanopowders with a help of powerful CO2 laser

V. V. Osipov; V. V. Lisenkov; V. V. Platonov

doi:10.1117/12.879899

17 February 2011 Synthesis of nanopowders with a help of powerful CO₂ laser

V. V. Osipov, V. V. Lisenkov, V. V. Platonov

Proceedings Volume 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies; 79941V (2011) https://doi.org/10.1117/12.879899
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

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.

Citation Download Citation

V. V. Osipov, V. V. Lisenkov, and V. V. Platonov "Synthesis of nanopowders with a help of powerful CO₂ laser", Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941V (17 February 2011); https://doi.org/10.1117/12.879899

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