Abstract
The crystal structures of LaGaO3, LaGa0.9Mg 0.1O2.95, and La0.9Sr0.1Ga 0.9Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa 0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R3̄c) at between 350 and 800°C. On the other hand, La0.9Sr0.1Ga 0.9Mg0.1O2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R3̄c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.
Original language | English |
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Pages (from-to) | 4235-4243 |
Number of pages | 9 |
Journal | Chemistry of Materials |
Volume | 17 |
Issue number | 16 |
DOIs | |
Publication status | Published - Aug 9 2005 |
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
- Materials Chemistry