SYNTHESIS OF Ce0.8Sm0.2O2- NANOPARTICLES VIA COPRECIPITATION
Keywords:
Fuel cells, CeO2, coprecipitationAbstract
Ce0.8Sm0.2O2-δ nanoparticles have been synthesized via carbonate coprecipitation method usingammonium carbonate (AC) as a precipitant. The AC:RE (RE = Ce + Sm) molar ratio (R) and thereaction temperature (T) affect particle size and morphology. The spherical nanoparticles can beobtained in a range of R < 10. The optimum processing condition to achieve the powder particle sizeof 20 - 25 nm is R = 10 and T = 70°C. However, the single phase of calcined powder can be detected fromXRD regardless of synthesis conditions. SEM micrographs of samples sintered at 1,300°C with asoaking time of 2 h show uniform and small grains.
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