Oxygen content, crystal structure and chemical expansion of PrBaCo2-xFexO6-delta double perovskites / Tsvetkov D. S.,Ivanov I. L.,Malyshkin D. A.,Zuev A. Yu. // DALTON TRANSACTIONS. - 2014. - V. 43, l. 31. - P. 11862-11866.

ISSN/EISSN:

1477-9226 / 1477-9234

Type:

Article

Abstract:

PrBaCo2-xFexO6-delta (x = 0-0.6) double perovskites were shown to have a tetragonal P4/mmm structure in air over the complete temperature range investigated despite the oxygen content reaching a threshold value of 5.5 at temperatures from 850 degrees C for x = 0 up to 1078 degrees C for x = 0.6. However the P4/mmm -> Pmmm structure transition was found to occur in PrBaCo2O6-delta under reducing conditions at temperatures from 500 degrees C at pO(2) = 10(-3) atm down to 350 degrees C at pO(2) = 10(-4) atm. The lattice chemical expansion along the a-axis and contraction along the c-axis, with decreasing oxygen content, 6 - delta, were found to completely compensate each other in the double perovskites and, therefore, their volume chemical expansion became negligible. As a result the cell volume linearly increases with temperature contrary to simple cubic perovskites.

Author keywords:

SITU NEUTRON-DIFFRACTION; HIGH-TEMPERATURE; PRBACO2O5+DELTA; LNBACO(2)O(5+DELTA); NDBACO2O5+DELTA; CHEMISTRY; CATHODE

DOI:

10.1039/c4dt00847b

Web of Science ID:

ISI:000339862400011

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG 21
Publisher	ROYAL SOC CHEMISTRY
Address	THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Language	English
EISSN	1477-9234
Keywords-Plus	SITU NEUTRON-DIFFRACTION; HIGH-TEMPERATURE; PRBACO2O5+DELTA; LNBACO(2)O(5+DELTA); NDBACO2O5+DELTA; CHEMISTRY; CATHODE
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear
Author-Email	dmitry.tsvetkov@wfu.ru
ResearcherID-Numbers	Ivanov, Ivan/E-7879-2017 Malyshkin, Dmitry/M-2195-2016 Tsvetkov, Dmitry/N-2491-2016 Albe, Karsten/F-1139-2011 Zuev, Andrey/E-6220-2014
ORCID-Numbers	Ivanov, Ivan/0000-0001-9277-7543 Malyshkin, Dmitry/0000-0002-8828-4882
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation; Centres of Excellence Program at Ural Federal University, Russia
Funding-Text	This work was supported by the Ministry of Education and Science of the Russian Federation within the framework of the Federal Program ``The scientific and scientific-education personnel of Innovative Russia for 2009-2013{''} and by the Centres of Excellence Program at Ural Federal University, Russia.
Number-of-Cited-References	22
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	46
Journal-ISO	Dalton Trans.
Doc-Delivery-Number	AM4YP