Abstract
We synthesized nano sized cerium and zirconium oxide particles by the hydrothermal treatment of precipitates formed from the chlorides of each metal ion. Especially the cerium oxide particles had plate-like shapes with the particle size in the range of 2-20 run. Even in the particle size of 2nm, most of the cerium oxide particles observed by a high resolution transmission electron microscope showed clear lattice images based on (111) and (200) planes indicating the plate-like single crystals. In the zirconium oxide particles, it was confirmed that the single phases of monoclinic and tetragonal crystals were obtained by the hydrothermal treatment lower than 200°C maintaining the particle size of about 10nm.
