Low‐Temperature Chemical Synthesis of Lanthanum Monoaluminate
作者： Ercan Taspinar , A. Cuneyt Tas
DOI: 10.1111/J.1151-2916.1997.TB02801.X
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摘要: One of the promising candidates for ferroelectric substrate materials, lanthanum monoaluminate (LaAlO3), was successfully synthesized by two separate chemical powder preparation techniques: (i) homogeneous precipitation from aqueous solutions containing urea (CH4N2O) in presence nitrate salts, and (ii) self-propagating combustion synthesis CH4N2O respective salts aluminum. The submicrometer, spherical-like particles precursors were completely converted to pure LaAlO3 at 850C route, same conversion temperature observed be 750C, which becomes lowest ever reported a phase. materials characterized X-ray diffractometry, simultaneous thermogravimetric/differential thermal analysis, scanning electron microscopy, energy-dispersive spectroscopy. Structural refinements Rietveld analysis showed that isostructural with BaTbO3 had space group R-3c, contrast previously assumed R-3m this atomic positions structure refined presented first time, respect present group.
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