Synthesis,structural characterization and electrical property of new oxide ion conductors: La3MMo2O12 (M = In,Ga and Al) |
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| Affiliation: | 1. College of Chemistry and Chemical Technology, Heilongjiang University, Harbin 150080, Heilongjiang, PR China;2. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, PR China;3. Graduate School of the Chinese Academy of Sciences, Beijing 100049, PR China;1. New Industry Creation Hatchery Center (NICHe), Tohoku University, Japan;2. Institution for Materials Research, Tohoku University, Japan;3. C&A Corporation, Japan;4. General Physics Institute, Moscow, Russia;1. Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide, F-59000 Lille, France;2. CRISMAT, CNRS, UMR 6508, ENSICAEN, Caen, France |
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| Abstract: | ![]()
New series of oxides, La3MMo2O12 (M = In, Ga and Al), have been prepared by the solid-state reaction. The composition and elemental distribution were analyzed by the energy-dispersive X-ray (EDX) analysis. As determined by the X-ray diffraction (XRD), these compounds have similar crystal structures that can be indexed on a monoclinic cell at room temperature. AC impedance spectra and the DC electrical conductivity measurements in various atmospheres indicate that they are oxide ion conductors with ionic conductivities between 10− 2 and 10− 3 S/cm at 800 °C. The conductivity decreases in the order of La3GaMo2O12 > La3AlMo2O12 > La3InMo2O12, implying that the effect of cell volume and polarization associated with In3+, Ga3+ and Al3+ play an important role in the anion transport of these materials. The reversible phase transition was observed in all these compounds as confirmed by the differential thermal analysis (DTA) and dilatometric measurements. |
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