Synthesis, crystal structure and properties of SmBaCo2-xFexO5+delta / Volkova N. E.,Gavrilova L. Ya.,Cherepanov V. A.,Aksenova T. V.,Kolotygin V. A.,Kharton V. V. // JOURNAL OF SOLID STATE CHEMISTRY. - 2013. - V. 204, l. . - P. 219-223.

ISSN/EISSN:

0022-4596 / нет данных

Type:

Article

Abstract:

The solid solution formation range in the SmBaCo2-xFexO5+delta (0 <= x <= 2) system examined at 1100 degrees C in air corresponds to 0 <= x <= 1.1. The crystal structure of SmBaCo2-xFexO5+delta with x <= 0.5 was described as orthorhombic (space group Pmmm), and with 0.6 <= x <= 1.1-as tetragonal (P4/mmm). The introduction of iron into the cobalt sublattice leads to a gradual increase of the unit cell parameters and volume, accompanied with increasing oxygen content determined by thermogravimetry. The dilatometric curves collected at 25-1100 degrees C in air exhibit moderate nonlinearities associated with the orthorhombic -> tetragonal phase transition, as confirmed by the high-temperature X-ray diffraction analysis. Temperature dependencies of the electrical conductivity measured by 4-probe dc method in the temperature range 25-1000 degrees C in air display maxima at 300-350 degrees C, whilst the conductivity decreases with iron additions. These trends were discussed in terms of the defect structure and nature of the main charge carriers in SmBaCo2-xFexO5+delta. It was also shown that SmBaCo2-xFexO5+delta is chemically stable with respect to the Ce0.8Sm0.2O1.9 solid electrolyte up to 1100 degrees C, but reacts with Zr0.85Y0.15O1.93 even at 900 degrees C. (C) 2013 Elsevier Inc. All rights reserved.

Author keywords:

Double perovskite; Iron substituted samarium barium cobaltite; Crystal structure; Oxygen content; Thermal expansion; Conductivity OXIDE FUEL-CELLS; CATHODE MATERIAL; PEROVSKITES

DOI:

10.1016/j.jssc.2013.06.001

Web of Science ID:

ISI:000322932600034

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE
Address	525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Language	English
Keywords-Plus	OXIDE FUEL-CELLS; CATHODE MATERIAL; PEROVSKITES
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
Author-Email	Vladimir.Cherepanov@usu.ru
ResearcherID-Numbers	Kharton, Vladislav /P-6306-2014 Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Russian Foundation for Basic Research {[}13-03-00958\_a]; Ministry for Education and Science of the Russian Federation; FCT, Portugal {[}PEst-C/CTM/LA0011/2011, PTDC/CTM-CER/114561/2009]
Funding-Text	This work was financially supported in parts by the Russian Foundation for Basic Research (Project No. 13-03-00958\_a), the Ministry for Education and Science of the Russian Federation within the Federal Target Programs ``Investigations and researches 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	J. Solid State Chem.
Doc-Delivery-Number	198OQ