Synthesis, structure and oxygen nonstoichiometry of La0.4Sr0.6Co1-yFeyO3-delta / Cherepanov V. A.,Gavrilova L. Ya.,Aksenova T. V.,Ananyev M. V.,Bucher E.,Caraman G.,Sitte W.,Voronin V. I. // PROGRESS IN SOLID STATE CHEMISTRY. - 2007. - V. 35, l. 2-4, SI. - P. 175-182.

ISSN/EISSN:

0079-6786 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The samples of La0.4Sr0.6Co1-yFeyO3-delta (y=0.2 and 0.4) were prepared using both conventional ceramic technique and nitrate-citrate precursors technique. The phase identification was made by X-ray diffraction method. The refinement of structural parameters from the XRD and neutron diffraction measurements was performed by full profile Rietveld analysis. Neutron diffraction showed that both samples possess distorted perovskite-type structure. Oxygen nonstoichiometry was measured by chemical analysis and then mogravi metry TG) analysis in the range 20 <= T/degrees C <= 900 and 2E-5 <= pO(2)/atm <= 4E-1. TG-experiments indicate a relatively fast and reversible oxygen exchange at pO(2) > 1E-2 atm. Mass saturation occurs at T < 300 degrees C upon cooling. The absolute value of oxygen nonstoichiometry was determined by iodometric titration measurements. It was found that both samples have practically stoichiometric composition at 300 degrees C in air and 5 increases with increasing temperature and decreasing oxygen partial pressure. (C) 2007 Published by Elsevier Ltd.

Author keywords:

IONIC-CONDUCTIVITY; PHASE-EQUILIBRIA; O SYSTEM; OXIDE; MEMBRANES

DOI:

10.1016/j.progsolidstchem.2007

Web of Science ID:

ISI:000248298000002

Соавторы в МНС:

Другие поля

Поле	Значение
Note	International Conference on Perovskites Properties and Potential Applications, Dubendorf, SWITZERLAND, 2005
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
Keywords-Plus	IONIC-CONDUCTIVITY; PHASE-EQUILIBRIA; O SYSTEM; OXIDE; MEMBRANES
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear
Author-Email	vladimir.cherepanov@usu.ru
ResearcherID-Numbers	Ananyev, Maxim/F-5104-2014 Cherepanov, Vladimir/E-6451-2014 Voronin, Vladimir/J-7733-2013
ORCID-Numbers	Ananyev, Maxim/0000-0002-2254-0193 Cherepanov, Vladimir/0000-0003-3653-6459 Voronin, Vladimir/0000-0002-3901-9812 Bucher, Edith/0000-0002-9017-9555
Number-of-Cited-References	10
Usage-Count-Since-2013	5
Journal-ISO	Prog. Solid State Chem.
Doc-Delivery-Number	193TP