Abstract
Nanocrystalline CeO 2 powders of high sinterability have been successfully synthesized by a mimic alkoxide method, which employs alcohols as solvent, cerium nitrate hexahydrate as cerium source and diethylamine (DEA) as precipitant. Precipitation participating anions (OH −) are generated via the hydrolysis of DEA with the molecular water of the cerium salt. Irrespective of solvent type, the precursors produced by this method are CeO 2·2H 2O, which completely dehydrates to CeO 2 at temperatures >500°C. Calcining the precursors at 600°C for 2 h yields highly reactive CeO 2 powders with average crystallite sizes of ∼15 nm. These powders can be densified to >99% of the theoretical up to 1160°C in air at a constant heating rate of 10°C/min or to the same density by isothermal sintering at 1000°C for 2 h. The effects of calcination temperature and solvent type on powder characteristics and sinterability are also investigated.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
