Preparation and Electrical Conductivity of Scandia Stabilized Zirconia by using Ultrasonic Spray Pyrolysis

Scandia stabilized zirconia (ScSZ) is adapted for electrolyte material of solid oxide fuel cell (SOFC) because of its high ionic conductivity and chemical stability. ScmnSZ1 powder having a composition of ((ZrO₂) 0.89 (Sc₂O₃) 0.1 MnO₂) 0.01 ) is synthesized by ultrasonic spray pyrolysis (USP) method. Porous ScmnSZ1 powder is obtained by using a pore forming agent. Microstructure and morphology, particle size distribution of porous powder synthesized with ₃ wt% pore forming agent are investigated. Sintered ScmnSZ1 sample with ground fine powder are also investigated their microstructure and electrical conductivity. The electrical conductivity of sintered ScmnSZ1 samples with ground fine powder was 0.082 S/㎝, 0.127 S/㎝ and 0.249 S/㎝ at 750℃, 800℃ and 900℃, respectively.