Precursori heterometalici pentru materiale oxidice nanostructurate [Articol]

Abstract

In this work nanocrystalline structures of Ln0,5Sr0,5Co0,8Fe0,2O3 (LSCF1), Ln0,8Sr0,2Co0,8Fe0,2O3 (LSCF2) and Sm0,5Sr0,5CoO3 (SSC) have been synthesized by thermolysis of heterometallic precursors. The precursors have been prepared by using aminopolycarboxylate (DTPA, EDTA, CDTA and NTA) as chelates and nitrates or acetates as metal source. Pure perovskite phase was completely formed after thermal treatment of the samples to 800 ºC, followed by a 6 h annealing in air. The composition and morphology of resulted powders were characterized by means of modern techniques SEM, XRD, XPS and EDX