Microwave-assisted synthesis: A fast and efficient route to produce LaMO3 (M=Al, Cr, Mn, Fe, Co) perovskite materials

• Published in: Materials research bulletin Vol. 46; no. 2; pp. 222 - 230
• Main Authors: Prado-Gonjal, J., Arévalo-López, Á.M., Morán, E.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2011
• Subjects: A. Inorganic compounds; A. Oxides; B. Chemical synthesis; B. Magnetic properties; C. Thermogravimetric analysis; C. X-ray diffraction; D. Crystal structure; B. Chemical synthesis; A. Inorganic compounds; C. X-ray diffraction; C. Thermogravimetric analysis; B. Magnetic properties; A. Oxides; D. Crystal structure
• ISSN: 0025-5408; 1873-4227
• DOI: 10.1016/j.materresbull.2010.11.010

[Display omitted] ▶ Lanthanum perovskites can be prepared by microwave irradiation in a domestic set-up. ▶ Microwave-assisted synthesis yields well crystallized and pure materials, sometimes nanosized. ▶ Rietveld analysis has been performed to refine the structures. ▶ Magnetic and electric measurements are similar to those previously reported. ▶ Microwave-assisted synthesis is a fast and efficient method for the synthesis of lanthanum perovskites. A series of lanthanum perovskites, LaMO3 (M=Al, Cr, Mn, Fe, Co), having important technological applications, have been successfully prepared by a very fast, inexpensive, reproducible, environment-friendly method: the microwave irradiation of the corresponding mixtures of nitrates. Worth to note, the microwave source is a domestic microwave oven. In some cases the reaction takes place in a single step, while sometimes further annealings are necessary. For doped materials the method has to be combined with others such as sol–gel. Usually, nanopowders are produced which yield high density pellets after sintering. Rietveld analysis, oxygen stoichiometry, microstructure and magnetic measurements are presented.