Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27335
Title: Preparation, crystal structure and properties of HoBaCo 2-xFexO5+δ
Authors: Gavrilova, L.
Volkova, N. E.
Aksenova, T. V.
Cherepanov, V. A.
Issue Date: 2013
Citation: Preparation, crystal structure and properties of HoBaCo 2-xFexO5+δ / L. Gavrilova, N. E. Volkova, T. V. Aksenova [et al.] // Materials Research Bulletin. — 2013. — Vol. 48. — № 6. — P. 2040-2043.
Abstract: A series of samples of overall composition HoBaCo2-xFe xO5+δ with 0.0 ≤ x ≤ 0.8 were prepared by glycerin nitrate technique in air and in pure oxygen. Irrespective of atmosphere used the homogeneity range of single phase iron substituted holmium barium cobaltate was proved to exist within the range 0.0 ≤ x ≤ 0.4. All samples prepared in air and samples within the compositional range 0.2 ≤ x ≤ 0.4 obtained in oxygen possess tetragonal ap × ap × 2ap (sp. gr. 4/mmm) structure. HoBaCo2O 5+δ and HoBaCo1.9Fe0.1O 5+δ synthesized in oxygen crystallized in orthorhombic a p × 2ap × 2ap (sp. gr. mmm) structure. The structural parameters were refined by the Rietveld analysis. It was shown that parameter a remains practically constant while parameter c gradually increases with the increase of iron content. The changes of oxygen content in HoBaCo2-xFexO5+δ (x = 0, 0.2, 0.4) were measured by TGA within the temperature range 25-1100 °C in air. The absolute value of oxygen content was determined by the reduction of the samples in hydrogen flow. The influence of oxygen and iron content on the crystal structure has been discussed. The chemical stability of HoBaCo 2-xFexO5+δ in contact with the solid electrolyte materials Ce0.8Sm0.2O2 and Zr 0.85Y0.15O2 was examined. © 2013 Elsevier Ltd.
Keywords: A. INORGANIC COMPOUNDS
B. CHEMICAL SYNTHESIS
C. THERMOGRAVIMETRIC ANALYSIS (TGA)
D. CRYSTAL STRUCTURE
ABSOLUTE VALUES
CHEMICAL SYNTHESIS
COMPOSITIONAL RANGE
ELECTROLYTE MATERIAL
INFLUENCE OF OXYGEN
STRUCTURAL PARAMETER
STRUCTURE AND PROPERTIES
TEMPERATURE RANGE
INORGANIC COMPOUNDS
OXYGEN
RIETVELD ANALYSIS
SOLID ELECTROLYTES
THERMOGRAVIMETRIC ANALYSIS
IRON COMPOUNDS
URI: http://hdl.handle.net/10995/27335
SCOPUS ID: 84875925786
WOS ID: WOS:000318462200006
PURE ID: 906980
ISSN: 0025-5408
DOI: 10.1016/j.materresbull.2013.02.027
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS

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