ChemInform Abstract: Synthesis of LaMO₃ (M: Fe, Co, Ni) Using Nitrate or Nitrite Molten Salts.

Abstract

Synthesis of LaMO 3 (M: Fe, Co, Ni) Using Nitrate or Nitrite Molten Salts. -Nanocrystals of the title compounds are prepared from mixtures of La(NO3)3 and Fe(NO3)3, Co(NO3)2, or Ni(NO3)2 in NaNO2, NaNO3-KNO3 eutectic, or NaNO3-KNO3 eutectic with Na2O2 molten salts (450-800°C, 2 h). The samples are characterized by powder XRD and SEM. Addition of Na2O2 facilitates the reaction between La 2 O 3 and NiO or Co 3 O 4 , leading to the formation of LaNiO 3 and LaCoO 3 at a much lower temperature of 450°C. Pure hexagonal LaNiO3 nanocrystals are obtained in molten NaNO3-KNO3 eutectic with Na2O2 at 550-750°C. -(YANG*, J.; LI, R.; ZHOU, J.; LI, X.; ZHANG, Y.; LONG, Y.; LI, Y.; J. Alloys Compd. 508 (2010) 2, 301-308,