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An investigation of conductivity microst

S.P.S. Badwal, F.T. Ciacchi

2026enionic conductivitysolid electrolytesscandia zirconiaalumina additivesmicrostructurefuel cells

Abstract

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In search for better ionically conducting ceramics for oxygen separators, fuel cells, and sensors, the electrical conductivity and microstructure of the 9 mol% (Sc2O3 ±Y2O3)±ZrO2 system with varying Sc2O3/Y2O3 ratios has been investigated in detail with XRD, SEM, TEM, and conductivity measurements as a function of temperature. The stability of electrolyte compositions was studied by continuously monitoring conductivity as a function of time at 850 and 1000 °C. Impedance spectroscopy was employed for determining the contribution of the grain boundary resistivity. The role of alumina additions to selected Sc2O3 ±Y2O3 ±ZrO2 compositions was studied as alumina is known to reduce the grain boundary resistivity by scavenging silica impurities and enhance mechanical properties in zirconia-based systems. Al2O3-containing compositions show much higher conductivity degradation compared with alumina-free materials. This behaviour has been investigated in more detail with XRD and TEM analysis.

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Cite This Work

@article{fe7f9b9b-7406-4933-9e76-63f13ba4c166,
  title={An investigation of conductivity microst},
  author={S.P.S. Badwal and F.T. Ciacchi},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - An investigation of conductivity microst
AU  - S.P.S. Badwal
AU  - F.T. Ciacchi
PY  - 2026
LA  - en
ER  -

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