Crystal Structure and Electrical Properties of Magnesia Co-Doped Scandia Stabilized Zirconia. Issue 14 (1st January 2015)

• Record Type: Journal Article
• Authors: Sonoyama, Noriyuki; Martin, Susana Garcia; Amador, Ulises; Imanishi, Nobuyuki; Ikeda, Masaki; Erfu, Ni; Tanimura, Hiroshi; Hirano, Atsushi; Takeda, Yasuo; Yamamoto, Osamu
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 14(2015)
• Page Start: F1397
• Page End: F1401
• Publication Date: 2015-01-01
• Subjects: Mg co-doping in ScSZ -- oxide ion conductivity -- Scandia stabilized zirconia; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0231514jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Mg-doping effects on the crystal structure and ion conduction properties of Scandia Stabilized Zirconia have been studied in the (ZrO2 )0.89 (Sc2 O3 )0.11- x (MgO) x (0 ≤ x ≤ 0.07) system. The materials have been prepared by a sol-gel method. Characterization of the crystal structure has been carried out by means of X-ray diffraction, Raman spectroscopy, synchrotron X-ray diffraction, selected area electron diffraction and high resolution transmission electron microscopy. Cubic phase-stabilization is observed in materials corresponding to x ≥ 0.03 but single cubic-phase formation is achieved only in (ZrO2 )0.89 (Sc2 O3 )0.08 (MgO)0.0 3 . Ionic conductivity of the oxides has been determined by complex impedance spectroscopy. Stabilization of the cubic phase in the compounds with x ≥ 0.03 values avoids rhombohedral-cubic phase transformation, improving the conductivity bellow 600°C compare to the one of 11ScSZ.