Synthesis of nano size Cerium Oxide by Glycothermal Processing

摘要

PURPOSE: A method for producing ceria powder having nano size is provided to produce the powder useable as catalyst and/or polishing material having less than 100 nm diameter and uniform distribution of particle size by applying high temperature and high pressure together with organic solvent. CONSTITUTION: The method comprises applying cerium precursor as a starting material and glycol as the organic solvent; and synthesizing the mixture into the ceria powder product by adding any agents for regulating shape and granule size under 150-300 deg.C, 3-30kgf/cm¬2 of pressure for 1-48 reaction time. The cerium precursor is selected from Ce(NO3)36H2O, Ce2(C2O4)3xH2O, Ce2(SO4)3xH2O in a concentration of 0.1-2mole/l. The solvent is at least one or two selected from ethylene glycol, propylene glyco, 1-4 butanediol. The shape and granule size regulating agent is at least one or two selected from water, itaconic acid or HNO3.