Synthesis,Characterization and Oxide Ionic Conductivity of Binary δ‐(Bi2o3)1‐x(Lu2o3)x System

In this study, after doping Lu₂O₃ to α‐Bi₂O₃ in the range of 11% ≤ n ≤ 20% in a series of different mole ratios, heat treatment was performed by applying a cascade temperature rise in the range of 700‐800 °C for 72 hours and new phases were obtained in the (Bi₂o₃)_1‐x(Lu₂o₃)_x system. After 72 hours of heat treatment at 800 °C, mixtures containing 14‐16% Lu₂O₃ formed a face‐centered cubic phase. Mixtures containing 11– 13%, 17%, 18% mole Lu₂O₃ were subjected to a quenching process at 825 °C and face‐centered cubic phases were obtained. With the help of XRD, the crystal systems and lattice parameters of the solid solutions were obtained and their characterization was carried out. Thermal measurements were made by using a simultaneous DTA/TG system. The total conductivity (σ_T) in the δ‐Bi₂O₃ doped with Lu₂O₃ system was measured using the four‐probe DC method. Keywords: Bismuth oxide; lutesium oxide; oxygen ionic conductivity; X‐ray techniques; thermal analysis.