Electric properties of oxyfluorides Ba2In2O5-0.5xF (x) with brownmillerite structure / Tarasova N. A.,Filinkova Ya. V.,Animitsa I. E. // RUSSIAN JOURNAL OF ELECTROCHEMISTRY. - 2013. - V. 49, l. 1. - P. 45-51.

ISSN/EISSN:

1023-1935 / нет данных

Type:

Article

Abstract:

Synthesis of fluoro-substituted substances based on brownmillerite Ba2In2O5 is carried out. The width of the homogeneity region of the Ba2In2O5-0.5x F (x) (0 < x a parts per thousand currency sign 0.25) solid solution was established using X-ray analysis. Measurement of temperature dependences of conductivity in atmospheres with different partial pressure of water vapor (pH(2)O = 3.3 and 2 x 10(3) Pa) showed an increase in conductivity at T a parts per thousand currency sign 550A degrees C in a humid atmosphere, which is due to appearance of proton transport. The dependence of conductivity on partial oxygen pressure (pO(2) = 0.21 x 10(5) to 10(-15) Pa) is studied in the temperature range of 500-1000A degrees C; ion transport numbers are calculated. The method of polarization measurements was used to determine transport numbers of fluoride. Total conductivity is divided into ion (proton, oxygen, and fluoride ion) and electron components. Analysis of concentration dependences of conductivities showed that low concentrations of fluoride allow increasing both the total and partial conductivities (oxygen-ion and proton) and, besides, allow shifting the ``order-disorder{''} phase transition by 100A degrees C to the low temperature range.

Author keywords:

brownmillerite; oxyfluoride; anion doping; ion conductivity PROTON CONDUCTOR BA2IN2O5; SUBSTITUTED BA2IN2O5; IONIC-CONDUCTIVITY; DOPED BA2IN2O5; OXYGEN; PHASE; DIFFRACTION; TRANSITION; SYSTEMS

DOI:

10.1134/S102319351301014X

Web of Science ID:

ISI:000314041600004

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	PROTON CONDUCTOR BA2IN2O5; SUBSTITUTED BA2IN2O5; IONIC-CONDUCTIVITY; DOPED BA2IN2O5; OXYGEN; PHASE; DIFFRACTION; TRANSITION; SYSTEMS
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	Natalia.Tarasova@usu.ru
ResearcherID-Numbers	Tarasova, Natalia/E-4534-2017
Funding-Acknowledgement	Russian Foundation for Basic Research {[}12-03-31234 mol\_a]
Funding-Text	The work was financially supported by the Russian Foundation for Basic Research (project no. 12-03-31234 mol\_a), Contest for Carrying out Research of Ural Federal University and Federal Target Program ``Scientific and Scientific-Pedagogical Human Resources of Innovative Russia in 2009-2013.{''}
Number-of-Cited-References	23
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	33
Journal-ISO	Russ. J. Electrochem.
Doc-Delivery-Number	077QD