A.S. Urusova
Ural Federal University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by A.S. Urusova.
Journal of Materials Chemistry | 2014
A.S. Urusova; V.A. Cherepanov; Oleg I. Lebedev; T.V. Aksenova; L.Ya. Gavrilova; V. Caignaert; B. Raveau
Polycrystalline “112” ordered oxygen deficient double perovskites YBaCo2−xMexO5+δ (Me = Fe, Cu, Ni) were synthesized by a glycerol-nitrate route with 0.0 ≤ x ≤ 0.7 for Me = Fe, 0.0 ≤ x ≤ 0.6 for Me = Cu and x = 0.1 for Me = Ni. The combined X-ray diffraction, electron microscopy and thermo-gravimetric studies show that all these oxides exhibit the ap × ap × 2ap tetragonal structure (S.G. P4/mmm); moreover, the oxygen content increases continuously with x in the iron-substituted oxide YBaCo2−xFexO5+δ, whereas the opposite is observed for the copper phase YBaCo2−xCuxO5+δ. This difference, which is due to the more electropositive character of Fe3+ compared to Cu2+, is hindered in the Ni2+ case due to its inability to accommodate the pyramidal coordination. The changes of the conductivity of these compounds versus temperature are closely related to their oxygen loss, in agreement with a defect structure model suggested earlier. Thermal expansion measurements prove the absence of phase transition in all oxides within the temperature range studied. The chemical compatibility of YBaCo1.4Fe0.6O5+δ with the electrolyte Ce0.8Sm0.2O2−δ is also demonstrated.
Russian Journal of General Chemistry | 2016
Nadezhda E. Volkova; A.S. Urusova; L.Ya. Gavrilova; A.V. Bryuzgina; K. M. Deryabina; M. Yu. Mychinko; Oleg I. Lebedev; B. Raveau; V.A. Cherepanov
Formation of five-layered Ln2–εBa3+εFe5O15–δ phases [exhibiting nanoscale ordering with layer-by-layer location of the cations in the Ln–Ba–(Ln,Ba)–(Ln,Ba)–Ba–Ln perovskite-type structure] has occurred in the Ln–Ba–Fe–O (Ln = Y, Pr, Nd, Sm, Eu, and Gd) systems at 1100°С in air. Partial substitution of iron with cobalt (Ln2–εBa3+εFe5–yCoyO15–δ, Ln = Nd, Sm, Eu) has stabilized formation of the ordered structure. The oxygen content in the complex oxides has been determined in air over a wide temperature range by means of high-temperature thermogravimetry and iodometric titration. The change in oxygen content with temperature for the phases with five-layered ordering was significantly smaller than for the disordered phases.
Journal of Solid State Chemistry | 2013
A.S. Urusova; V.A. Cherepanov; T.V. Aksenova; L.Ya. Gavrilova; E.A. Kiselev
Chimica Techno Acta. 2015. Vol. 2. № 4. | 2015
V.A. Cherepanov; L.Ya. Gavrilova; Nadezhda E. Volkova; A.S. Urusova; T.V. Aksenova; E.A. Kiselev
Journal of Solid State Chemistry | 2017
T.V. Aksenova; T.G. Efimova; O.I. Lebedev; Sh.I. Elkalashy; A.S. Urusova; V.A. Cherepanov
Journal of Alloys and Compounds | 2014
T.V. Aksenova; A.S. Urusova; L.Ya. Gavrilova; V.A. Cherepanov
Journal of Solid State Chemistry | 2017
T.V. Aksenova; A.E. Vakhromeeva; Sh.I. Elkalashy; A.S. Urusova; V.A. Cherepanov
Journal of Alloys and Compounds | 2017
A.S. Urusova; A.V. Bryuzgina; M. Yu. Mychinko; Natalia E. Mordvinova; Oleg I. Lebedev; V. Caignaert; E.A. Kiselev; T.V. Aksenova; V.A. Cherepanov
MRS Proceedings | 2012
V.A. Cherepanov; Ludmila Ya. Gavrilova; Tatyana V. Aksenova; A.S. Urusova; Nadezhda E. Volkova
Solid State Ionics | 2018
Sh.I. Elkalashy; A.R. Gilev; T.V. Aksenova; A.S. Urusova; V.A. Cherepanov