Structural, Morphological and Electrical Properties of La1-xSrxAlO3-δ (x = 0, 0.1, 0.15) Synthesized by the Pechini Method.

La1-xSrxAlO3-δ (x = 0, 0.1, 0.15) fine particles were prepared by the Pechini process using citric acid and ethylene glycol at low temperature 900 °C. The powders were studied by several physical characterization techniques. The FTIR spectrum of the resin treated at 200 °C revealed the formation of a metalorganic complex and a polymerized form of ethylene glycol. XRD spectra of the samples, calcined at 900 °C, illustrated a single phase LaAlO3. However, La0.9Sr0.1AlO3-δ and La0.85Sr0.15AlO3-δ powders mainly consist of a deficient hexagonal perovskite phase with a small amount of a second phase (LaSrAl3O7). Ionic conductivities of these materials were studied by impedance spectroscopy in the range of 100-700 °C in air.