Abstract
Ac conductivity (σac) obtained from admittance of Eu2Zr2O7 and La2Ce2O7, which have pyrochlore- and fluorite-type structure, respectively, was measured as a function of frequency in the range between 5 Hz and 13 MHz and in the temperature range between 573 and 1073 K. The frequency dependence of the σac of these oxide-ion conductors showed a remarkably different behavior from that of the cation ones. By comparison of the σac with other conductivity data obtained by dc four-probe and impedance spectroscopic methods, it was found that the σac in the frequency range below 105 Hz was strongly influenced by space charge polarization at grain boundary and that the σac obtained from high frequency plateau agreed with bulk conductivity, σib, from impedance spectra and dc conductivity, σdc.
Sign-in/Register to access full text options 
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.
