Crystal structure and oxygen content of the double perovskites GdBaCo2-xFexO6-delta / Tsvetkov D. S.,Ivanov I. L.,Zuev A. Yu. // JOURNAL OF SOLID STATE CHEMISTRY. - 2013. - V. 199, l. . - P. 154-159.

ISSN/EISSN:

0022-4596 / нет данных

Type:

Article

Abstract:

The iron solubility limit, x, in GdBaCo2-xFe5O6-delta determined by means of X-ray diffraction was found to be close to 0.65 in air. The crystal structure changes of the double perovskites GdBaCo2-xFexO6-delta (x=0-0.6) were studied by means of ``in situ{''} X-ray diffraction in temperature range from 25 to 900 C in air. The oxygen content, 6-delta, was determined for these double perovskites in air as a function of temperature by means of thermogravimetric technique in range 25 <= T, C <= 1100. The Pinmm-P4/mmm structure transition was found to occur in GdBaCo2-xFexO6-delta (0 <= x <= 0.4) with increasing temperature. This transition is observed at the same temperature for the compositions with 0 <= x <= 0.1 while the transition temperature reaches maximum for x=0.2 and that decreases linearly with further iron increase. The double perovskite GdBaCo1.4Fe0.6O6-delta was shown to have the tetragonal P4/mmm structure at room temperature. The P4/mmm-Pmmm structure transition occurs at temperature as low as 170 C for this double perovskite while reverse one is already observed at 290 C in air. The Pmmm-P4/mmm structure transition was found to be strongly related to the oxygen content for the undoped and slightly doped (x <= 0.2) double perovskites while there is no such relation for the double perovskites enriched by iron (x >= 0.2). (C) 2012 Elsevier Inc. All rights reserved.

Author keywords:

Oxygen content; Double perovskite; Structure transition OXIDE FUEL-CELLS; GDBACO2O5+X LAYERED PEROVSKITE; CATHODES; LNBACO(2)O(5+DELTA)

DOI:

10.1016/j.jssc.2012.12.013

Web of Science ID:

ISI:000315477500025

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
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; GDBACO2O5+X LAYERED PEROVSKITE; CATHODES; LNBACO(2)O(5+DELTA)
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
Author-Email	Dmitrii.Tsvetkov@usu.ru
ResearcherID-Numbers	Albe, Karsten/F-1139-2011 Tsvetkov, Dmitry/N-2491-2016 Zuev, Andrey/E-6220-2014 Ivanov, Ivan/E-7879-2017
ORCID-Numbers	Ivanov, Ivan/0000-0001-9277-7543
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation
Funding-Text	This work was supported by the Ministry of Education and Science of the Russian Federation within the framework of Federal Program ``Investigations and researches on the priority directions of development for the scientific and technological complex of Russia in 2007-2013{''}.
Number-of-Cited-References	16
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	47
Journal-ISO	J. Solid State Chem.
Doc-Delivery-Number	097MF