Electrical behaviour and microstructural characterization of magnesia co-doped ScSZ nanopowders synthesized by urea co-precipitation

Grazia Accardo, Gianfranco Dell'agli, Domenico Frattini, Luca Spiridigliozzi, SukWoo Nam, Sung Pil Yoon

Research output: Chapter in Book/Report/Conference proceedingChapter

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationChemical Engineering Transactions
PublisherItalian Association of Chemical Engineering - AIDIC
Pages1345-1350
Number of pages6
Volume57
ISBN (Electronic)9788895608488
DOIs
Publication statusPublished - 2017
Externally publishedYes

Publication series

NameChemical Engineering Transactions
Volume57
ISSN (Electronic)2283-9216

ASJC Scopus subject areas

  • Chemical Engineering(all)

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    Accardo, G., Dell'agli, G., Frattini, D., Spiridigliozzi, L., Nam, S., & Yoon, S. P. (2017). Electrical behaviour and microstructural characterization of magnesia co-doped ScSZ nanopowders synthesized by urea co-precipitation. In Chemical Engineering Transactions (Vol. 57, pp. 1345-1350). (Chemical Engineering Transactions; Vol. 57). Italian Association of Chemical Engineering - AIDIC. https://doi.org/10.3303/CET1757225