Structural and ionic conductivity studies of doped ceria electrolyte

摘要: The present study reports synthesis, XRD, Impedance spectroscopy and ionic conductivity of Ce 1− x (Gd 0.5 Pr 0.5) x O 2 (x= 0–0.24) system. These samples were synthesized through the sol-gel process followed by low temperature combustion. The samples were sintered at 1300 C to obtain dense ceramics (over 98%). XRD confirms the single phase with a cubic structure. The two-probe ac impedance spectroscopy was used to study the ionic conductivity of doped ceria samples. The Ce 0.88 (Gd 0.5 Pr 0.5) 0.12 O 2, Ce 0.84 (Gd 0.5 Pr 0.5) 0.16 O 2 compositions showed highest grain ionic conductivity values ie, 1.012× 10− 2 S/cm and 1.059× 10− 2 S/cm respectively at 500 C.