Preparation, crystal structure and properties of HoBaCo2-xFexO5+delta / Gavrilova L. Ya,Volkova N. E.,Aksenova T. V.,Cherepanov V. A. // MATERIALS RESEARCH BULLETIN. - 2013. - V. 48, l. 6. - P. 2040-2043.

ISSN/EISSN:

0025-5408 / нет данных

Type:

Article

Abstract:

A series of samples of overall composition HoBaCo2-xFexO5+delta 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 a(p) x a(p) x 2a(p) (sp. gr. P4/mmm) structure. HoBaCo2O5+delta and HoBaCo1.9Fe0.1O5+delta synthesized in oxygen crystallized in orthorhombic a(p) x 2a(p) x 2a(p) (sp. gr. Pmmm) 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+delta (x = 0, 0.2, 0.4) were measured by TGA within the temperature range 25-1100 degrees 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 HoBaCo2-xFexO5+delta in contact with the solid electrolyte materials Ce0.8Sm0.2O2 and Zr0.85Y0.15O2 was examined. (C) 2013 Elsevier Ltd. All rights reserved.

Author keywords:

Inorganic compounds; Chemical synthesis; Thermogravimetric analysis (TGA); Crystal structure OXIDE FUEL-CELLS; ELECTROCHEMICAL PERFORMANCE; OXYGEN NONSTOICHIOMETRY; LAYERED PEROVSKITE; DIFFUSION; CATHODES

DOI:

10.1016/j.materresbull.2013.02

Web of Science ID:

ISI:000318462200006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	OXIDE FUEL-CELLS; ELECTROCHEMICAL PERFORMANCE; OXYGEN NONSTOICHIOMETRY; LAYERED PEROVSKITE; DIFFUSION; CATHODES
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	Vladimir.cherepanov@usu.ru
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Russian Foundation for Basic Research {[}12-03-91663]; Ministry for Education and Science of the Russian Federation within the Federal Target Program ``Investigations and researchers on the priority directions of development for the scientific and technological complex of Russia{''}
Funding-Text	This work was financially supported in parts by the Russian Foundation for Basic Research (project no. 12-03-91663) and the Ministry for Education and Science of the Russian Federation within the Federal Target Program ``Investigations and researchers on the priority directions of development for the scientific and technological complex of Russia in 2007-2013{''}.
Number-of-Cited-References	23
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	37
Journal-ISO	Mater. Res. Bull.
Doc-Delivery-Number	137TX