17 February 2011 Synthesis of nanopowders with a help of powerful CO2 laser
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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.
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V. V. Osipov, V. V. Osipov, V. V. Lisenkov, V. V. Lisenkov, V. V. Platonov, 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); doi: 10.1117/12.879899; https://doi.org/10.1117/12.879899
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