Accardo, G. Dell'agli, G. Frattini, D. Spiridigliozzi, L. Nam, S.W. Yoon, S.P. 2024-01-20T01:31:42Z 2024-01-20T01:31:42Z 2021-08-31 2017-06 2283-9216 https://pubs.kist.re.kr/handle/201004/122717 In this study Scandia-doped zirconia co-doped with MgO, (MgO)0.03(ZrO2)0.88(Sc2O3)0.09, was synthetized by using the urea co-precipitation method in hot aqueous solution. MgO was added to prevent the transformation of cubic fluorite Sc-doped ZrO2 into rhombohedral phase, with worst electrical properties. The as-prepared powders were completely amorphous and, by a calcination step at 500 °C for 1 h, full conversion to fluorite phase occurred preserving the nano size character of powders. The presence of MgO allowed to effectively stabilize the cubic fluorite phase also after a prolonged thermal treatment at 1200 °C. The nanometric feature of the powder aided the sintering step of this material at 1600 °C. The EIS electrical characterization revealed that its ionic conductivity is 7.3.10-2 S/cm and 2.8.10-2 S/cm at 800 °C and 700 °C, respectively. Therefore, this material is suitable as ceramic electrolyte in SOFC operated at intermediate temperatures. ？ Copyright 2017, AIDIC Servizi S.r.l. English Italian Association of Chemical Engineering - AIDIC Electrical behaviour and microstructural characterization of magnesia co-doped ScSZ nanopowders synthesized by urea co-precipitation Article 10.3303/CET1757225 1 Chemical Engineering Transactions, v.57, pp.1345 - 1350 Chemical Engineering Transactions 57 1345 1350 N scopus 2-s2.0-85021671691 Article Characterization Coprecipitation Doping (additives) Electrolytes Fluorspar Magnesia Metabolism Powders Sintering Solid electrolytes Solid oxide fuel cells (SOFC) Solutions Urea Zirconia Ceramic electrolytes Coprecipitation method Electrical characterization Fluorite phase Intermediate temperatures Micro-structural characterization Rhombohedral phase Scandia-doped zirconia Precipitation (chemical)