Electrical properties and water incorporation in A-site deficient perovskite La1-xBaxNb3O9-0.5x / Animitsa I.,Iakovleva A.,Belova K. // JOURNAL OF SOLID STATE CHEMISTRY. - 2016. - V. 238, l. . - P. 156-161.

ISSN/EISSN:

0022-4596 / 1095-726X

Type:

Article

Abstract:

Barium doped A-site deficient perovskites La1-xBaxNb3O9-0.5x (x=0-0.05) were synthesized by the solid state method, their structure, electrical properties and state of oxygen-hydrogen groups have been investigated. These phases were found to be able to incorporate water from the gas phase and to exhibit proton transport. Hydration is accompanied by the formation of different forms of oxygen-hydrogen groups: OH- - groups and H3O+ - ions. The total conductivities of doped samples increased in a wet atmosphere due to the appearance of proton current carriers (at the temperatures below 700 degrees C), but the conductivity increased insignificantly (similar to 0.25 order of magnitude) because of a low doping level and, consequently, small concentration of protons. TG-measurements confirmed relatively low water content (below 0.2\%). The total conductivity depends substantially on x and exhibits a minimum on sigma-f(x) dependencies. It has been suggested that such behavior is a manifestation of a mixed cation effect. (C) 2016 Elsevier Inc. All rights reserved.

Author keywords:

A-site deficient perovskites; La1-xBaxNb3O9-0.5x (x=0-0.05); Conductivity; IR and Raman spectroscopy; Hydration BETA-LNNB3O9 PHASES LN; TRANSPORT-PROPERTIES; IONIC-CONDUCTIVITY; PROTON CONDUCTION; = LA; ND; LA1/3NBO3; NIOBATES; GLASSES; OXIDES

DOI:

10.1016/j.jssc.2016.03.023

Web of Science ID:

ISI:000375635200021

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUN
Publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE
Address	525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Language	English
EISSN	1095-726X
Keywords-Plus	BETA-LNNB3O9 PHASES LN; TRANSPORT-PROPERTIES; IONIC-CONDUCTIVITY; PROTON CONDUCTION; = LA; ND; LA1/3NBO3; NIOBATES; GLASSES; OXIDES
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
Author-Email	irina.animitsa@urfu.ru
Funding-Acknowledgement	Ural Federal University; Ural Branch, Russian Academy of Sciences, Russia
Funding-Text	This work was financially supported by the Grant of fundamental and exploratory research in cooperation of Ural Federal University and Ural Branch, Russian Academy of Sciences, Russia.
Number-of-Cited-References	47
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	5
Journal-ISO	J. Solid State Chem.
Doc-Delivery-Number	DL4VF