Study of synthesis dynamics of ceramic materials nanopowders at different processing modes by ultrafast laser pulses

Abstract

Abstract The paper presents a developed experimental setup for the synthesis of spherical nanoparticles using different processing modes by exposure of femtosecond laser pulses in an argon atmosphere. Using the combined processing approach leads to both an increase in ablation process efficiency and an increase in the dispersion of particle size of the resulting fraction as a result of coagulation of ablation products due to prolonged stay in the discharge plasma. When processing is carried out in an electrostatic field, there is a close to linear growth in ablation process efficiency in the investigated range of laser pulse energy. In this case, compared to the treatment with only a laser beam without an electrostatic field the dispersion of particle size of the resulting fraction is reduced. The difference in efficiency between these modes is about 70% at pulse energy of 145 μJ.