Abstract
A CaO excess type calcium zirconate electrolyte with a composition of Ca 1.1 Zr 0.9 O 2.9 was prepared. Its aging behavior at 900 °C and 1100 °C was evaluated by AC impedance. The conductivity decreases more seriously at higher temperature. Combined with the aging effect of 8.5 YSZ, the formation of [ Ca Zr ″ − V O •• ] promoted by annealing operation should be responsible for the aging effect in Ca 1.1 Zr 0.9 O 2.9 . The declined mobility of V O •• is viewed as the increase in hopping activation energy and the decrease in effective concentration of V O •• . Consequently, the diffusion coefficient of V O •• decreases and results in the aging behavior. • Confirmed the aging behavior in CaO excess calcium zirconate perovskite ceramics • The aging behavior works more seriously as temperature rises. • The Ca 1.1 Zr 0.9 O 2.9 presents a much more stable conductivity than the 8.5 YSZ shows. • The annealing operation enforces the formation of association [ Ca Zr ″ − V O •• ] and makes oxygen vacancy trapped. • The lock of oxygen vacancy reduces its effective diffusion coefficient.
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.
