Properties of Oxide Nanopowders Prepared by Target Evaporation with a Pulse-Periodic CO_2 Laser

摘要

The design and characteristics of a setup for producing metal oxide naopowders with an output of up to 20 g/h are discussed. The grain mean size in the powders is 15 nm, and the radiation power consumption is 30-40 (W h)/g. Y_2O_3-stabilized ZrO_2 (YSZ) and Al_2O_3 + YSZ nanopowders are prepared by target evaporation with a pulse-periodic CO_2 laser, followed by vapor condensation in an air stream. The mean powder, peak power, and efficiency of the pulse-periodic CO_2 laser, excited by a combined discharge, are, respectively, 1 kW, 10 kW, and ≈10%. Data for the powder specific surface, grain shape, and grain size distribution, as well as results o fX-ray phase and structure analysis, are reported.