Abstract:
The efficiency of utilization of CO2 laser energy for vaporization of Al2O3 ceramics is evaluated using a mathematical model for the interaction of laser radiation with materials. It is shown that the calculated efficiency of radiation-energy utilization is not higher than 15% at a radiation power density of 105 W/cm2 on the target. On the experimental facility designed for the synthesis of nanopowders, a vaporization rate of 1 g/h was achieved for Al2O3, which corresponds to a 3% efficiency of radiation-energy utilization. The dependence of the characteristic particle size of a zirconium oxide nanopowder on helium pressure in the range of 0.01–1.00 atm was studied. Results of experiments on vaporization of multicomponent materials (LaNiO3 and the Tsarev meteorite) are given.
Keywords:
laser vaporization, synthesis of nanomaterials, nanoparticles, nanopowder.
Citation:
V. N. Snytnikov, Vl. N. Snytnikov, D. A. Dubov, V. I. Zaikovskii, A. S. Ivanova, V. O. Stoyanovskii, V. N. Parmon, “Production of nanomaterials by vaporizing ceramic targets irradiated by a moderate-power continuous-wave CO2 laser”, Prikl. Mekh. Tekh. Fiz., 48:2 (2007), 172–184; J. Appl. Mech. Tech. Phys., 48:2 (2007), 292–302