Properties of oxide nanopowders prepared by target evaporation with a pulse-periodic co2 laser

Abstract

The design and characteristics of a setup for producing metal oxide nanopowders 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 2 O 3 -stabilized ZrO 2 (YSZ) and Al 2 O 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 power, 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 of X-ray phase and structure analysis, are reported.