Synthesis and characterization of the oxygen-deficient perovskite BaFe0.9-xY0.1CoxO3-delta (0 <= x <= 0.15) / Urusova A. S.,Bryuzgina A. V.,Cherepanov V. A.,Battle P. D.,Chin C. -M. // MATERIALS RESEARCH BULLETIN. - 2017. - V. 85, l. . - P. 90-95.

ISSN/EISSN:

0025-5408 / 1873-4227

Type:

Article

Abstract:

BaFe0.9-xY0.1CoxO3-delta (0 <= x <= 0.15) is shown to adopt the cubic perovskite structure at temperatures up to 1400 K in air. The oxygen vacancy concentration increases with both cobalt content and temperature, with BaFe(0.75)Y(0.1)C0(0.15)O(2.35) being the most oxygen-deficient composition observed. At 700 K the conductivity is similar to 2 S cm(-1) across the whole composition range. Measurements of the Seebeck coefficient show that holes are the dominant carrier. The coefficient of thermal expansion is essentially constant above 800 K, but not at lower temperatures. Chemical reactivity tests, along with the coefficient of expansion, show that these perovskites would not be suitable electrodes for fuel cells with fluorite electrolytes but they might serve as permeable membranes in catalytic reactors. (C) 2016 Elsevier Ltd. All rights reserved.

Author keywords:

Oxides; Thermogravimetric analysis (TGA); X-ray diffraction; Electrical properties; Thermal expansion OXIDE FUEL-CELLS; MAGNETIC EXCHANGE INTERACTIONS; FE-57 MOSSBAUER-SPECTROSCOPY; DEFECT STRUCTURE; SOLID-SOLUTIONS; ELECTRONIC CONDUCTIVITY; SEEBECK COEFFICIENT; NONSTOICHIOMETRY; CRYSTAL; DIFFRACTION

DOI:

10.1016/j.materresbull.2016.09

Web of Science ID:

ISI:000387630600012

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	PERGAMON-ELSEVIER SCIENCE LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Language	English
EISSN	1873-4227
Keywords-Plus	OXIDE FUEL-CELLS; MAGNETIC EXCHANGE INTERACTIONS; FE-57 MOSSBAUER-SPECTROSCOPY; DEFECT STRUCTURE; SOLID-SOLUTIONS; ELECTRONIC CONDUCTIVITY; SEEBECK COEFFICIENT; NONSTOICHIOMETRY; CRYSTAL; DIFFRACTION
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Multidisciplinary
Author-Email	v.a.cherepanov@urfu.ru peter.battle@chem.ox.ac.uk
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Ministry of Education and Science of RF {[}1039]; Russian Federation {[}02.A03.21.0006]
Funding-Text	This work was supported in part by the Ministry of Education and Science of RF (State Task project No 1039) and by Act 211 Government of the Russian Federation, agreement No 02.A03.21.0006.
Number-of-Cited-References	23
Usage-Count-Last-180-days	9
Usage-Count-Since-2013	30
Journal-ISO	Mater. Res. Bull.
Doc-Delivery-Number	EB8GX