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Crystal structure and oxygen nonstoichiometry of oxides in the Ba-Me-Me’-Y-O (Me, Me’=Co, Fe) system

A. S. Urusova, A. V. Bryuzgina, T. V. Aksenova, V. A. Cherepanov

Abstract


Polycrystalline BaМe1-xYxO3-δ(Me=Co, Fe) samples were synthesized by a conventional route and glycerol–nitrate technique. According XRD patterns of single phase solid solutions BaCo1-xYxO3-δ (0.1≤x≤0.4) and BaFe0.9-yY0.1CoyO3-δ(0.05≤y≤0.15) were indexed using Pm3m space group. The unit cell parameters were refined using Rietveld full-profile analysis. Oxygen nonstoichiometry of these solid solutions was measured by means of thermogravimetric technique within the temperature range 298–1273 K in air.

Keywords


perovskite structure; barium cobaltites; barium ferrites

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References


Lomakov MV, Istomin SYa, Abakumov AM, Van Tendeloo G, Antipov EV. Synthesis and characterization of oxygen-deficient oxides BaCo1 − xYxO3 − y, x = 0.15, 0.25 and 0.33, with the perovskite structure. Solid State Ionics. 2008;179(33-4):1885-9. doi:10.1016/j.ssi.2008.05.004

Shannon RD. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Cryst. 1976;A32:751–67. doi:10.1107/S0567739476001551

Urusova AS, Cherepanov VA, Aksenova TV, Gavrilova Ya, Kiselev EA. Phase equilibria, crystal structure and oxygen content of intermediate phases in the Y–Ba–Co–O system. J Solid State Chem. 2013;202:207-14. doi:10.1016/j.jssc.2013.03.037

Allred AL, Rochow EG. A scale of electronegativity based on electrostatic force. J Inorg Nucl Chem. 1958;5(4):264–8. doi:10.1016/0022-1902(58)80003-2




DOI: http://dx.doi.org/10.15826/chimtech.2015.2.2.015

Copyright (c) 2015 A. S. Urusova, A. V. Bryuzgina, T. V. Aksenova, V. A. Cherepanov

© Chimica Techno Acta, 2014-2018
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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