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

doi:10.17721/fujcV6I1P128-141

Authors

Iryna Brodnikovska Frantsevich Institute for Problems of Materials Science of NASU
Mykola Brychevskyia
Yehor Brodnikovskyi
Dmytro Brodnikovskyi
Oleksandr Vasylyev
Alevtina Smirnova

DOI:

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

Keywords:

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

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.

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