NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2017, 8 (5), P. 647–653
Peculiarities of LaFeO3 nanocrystals formation via glycine-nitrate combustion
A. Bachina – Saint Petersburg State Technological Institute (Technical University), Moskovskiy 26, St. Petersburg, 190013; Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya 26, St. Petersburg, 194021 Russia; a.k.bachina@gmail.com
V. A. Ivanov – Saint Petersburg State Technological Institute (Technical University), Moskovskiy 26, St. Petersburg, 190013, Russia
V. I. Popkov – Saint Petersburg State Technological Institute (Technical University), Moskovskiy 26, St. Petersburg, 190013; Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya 26, St. Petersburg, 194021 Russia
Varying glycine to nitrate ratio in the initial solution the powders based on nanocrystalline LaFeO3 were synthesized by solution combustion synthesis. The powders were studied by X-ray diffractometry, scanning electron microscopy, adsorption analysis and helium pycnometry. The average crystallite size of the synthesized LaFeO3 nanocrystals ranged from 18±2 to 85±9 nm, and the specific surface area of the nanopowders based on them ranged from 8 to 33 m2/g. Based on the results, the influence of redox composition of the reaction solution on the nature of the combustion processes, as well as the composition, structure and properties of LaFeO3 nanocrystals were analyzed. Here, it was shown, that the nanopowders have specific microstructure in terms of monocrystalline nanoscale layers of lanthanum orthoferrite, therefore it is allowed to consider them as a promising base for catalytically and magnetically functional materials.
Keywords: lanthanum orthoferrite, glycine-nitrate combustion, nanocrystals, formation mechanism, XRD, SEM.
PACS 81.07.-b
DOI 10.17586/2220-8054-2017-8-5-647-653