Joint Impedance Spectroscopy and Fractography Data Analysis of Ceria Doped Scandia Stabilized Zirconia Solid Electrolyte modified by powder types and sintering temperature

Iryna Brodnikovska, Mykola Brychevskyia, Yehor Brodnikovskyi, Dmytro Brodnikovskyi, Oleksandr Vasylyev, Alevtina Smirnova

Abstract


Parameters of the non-Debye relaxation in the 10Sc1CeSZ solid electrolyte made of various types of ZrO2 powder stabilized with 10-mol.% Sc2O3 and 1-mol.% CeO2 were studied. The influence of powder properties and their sintering temperatures on the impedance spectra is analyzed. In regard to electrical response, the polycrystalline ceramic electrolytes may be considered as a single-phase or a two-phase material consisting of a grain bulk and a boundary. In many cases, the boundary resistance is independent practically on dopants and their distribution across the powders and sintering temperatures. The powder compositions suitable for an electrolyte and electrodes are specified.

Keywords


non-Debye relaxation; grain resistance; boundary resistance; zirconia powders; sintering temperature

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DOI: https://doi.org/10.17721/fujcV6I1P128-141

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