Thermomechanical and electrophysical properties of a solid electrolyte based on Na–β"-Al2O3 with t-ZrO2 additions

Abstract

The strength, the fracture toughness, the thermal shock resistance, and the electrical conductivity of a ceramic Na–β"-Al₂O₃ solid electrolyte modified by t-ZrO₂ additions are studied. The influence of the reverse t-ZrO₂ → m-ZrO₂ transformation on the mechanical and functional properties of the ceramics is discussed. The ZrO₂ addition concentration is found to affect the sodium-ion conductivity of the solid electrolyte and its activation energy. The degree of defect accumulation in the ceramics modified by 8.5 wt % t-ZrO₂ is shown to decrease during a thermal shock.