Journal
CHEMISTRY OF MATERIALS
Volume 18, Issue 18, Pages 4385-4392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm060605f
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The preparation of a pure and nanostructured phase of the fast lithium conductor Li0.30La0.56TiO3 at low temperature (350 degrees C for 2 h) is reported for the first time. The synthesis has been carried out by the Pechini-type in-situ polymerizable method. It has been shown that the molar ratios ethylene glycol/citric acid and citric acid/metals, as well as the temperature, are crucial parameters during this synthesis. A careful control of the temperature during polyesterification allowed us to prepare the nanosized phase of oxide and to avoid the formation of thermally stable impurities. The crystallite size (20-30 nm) of the oxide has been determined by the analysis of the broadening of the powder X-ray diffraction lines. The particles size has been confirmed by transmission electron microscopy and the macroporous character of the powder has been evidenced by scanning electron microscopy.
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