The irradiation effect of a Nd-YAG pulsed laser on the CeO_2 target in the liquid

摘要

The irradiation of an Nd-YAG pulsed laser on the CeO_2 target in water was investigated. The reaction products depend mainly on the energy density of the Nd-YAG laser. The CeO_2 nanoparticles with sizes of 20-80 nm were formed in water, while the energy density was larger than 32 kJ/cm~2. The nanocrystalline films with grain sizes of 50- 150 nm were formed on the target with the energy density of 20-25 kJ/cm~2. Finally, the amorphous films were formed with the energy density of 6- 5 kJ/cm~2. The formation mechanisms of the nanoparticles and the films were discussed according to the triple-point phase diagram of CeO_2.