Abstract
Abstract 8 mol% yttria stabilized zirconia (8YSZ) nanopowders have been synthesized via a co-precipition-solvothermal treatment process at 200oC for 2-48 h. The co-precipitated amorphous hydroxide precursors were obtained by adding rare earth nitrate solution in an ammonia solution. Then the hydroxide precursors were solvothermal treated in various reaction media namely water, ammomia soluion and ethanol, followed by drying at 80oC over night . The influence of reaction medium on crystallzation and agglomeration state of 8YSZ nanopowders were investigated using XRD, SEM, and BET. Correlation between dielectric constant, boiling point and surface tension of reaction medium with crystallization and morphology of as-synthesized powders were discussed. The crystallization rate could be accelerated with the use of a low boiling point reaction medium. Crystallite size was increased with increasing dielectric constant and reaction time. The agglomeration state during drying process strongly depended on surface tension of the reaction medium. Improvement of agglomeration of primary particles was also proposed. The average crystallite sizes from all conditions were lower than 10 nm.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.