Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/27094
Title: Electric properties of oxyfluorides Ba2In2O 5-0.5x F x with brownmillerite structure
Authors: Tarasova, N. A.
Filinkova, Y. V.
Animitsa, I. E.
Issue Date: 2013
Citation: Tarasova N. A. Electric properties of oxyfluorides Ba2In2O 5-0.5x F x with brownmillerite structure / N. A. Tarasova, Y. V. Filinkova, I. E. Animitsa // Russian Journal of Electrochemistry. — 2013. — Vol. 49. — № 1. — P. 45-51.
Abstract: Synthesis of fluoro-substituted substances based on brownmillerite Ba 2In2O5 is carried out. The width of the homogeneity region of the Ba2In2O5-0.5x F x (0 < x ≤ 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 (pH2O = 3.3 and 2 Ч 103 Pa) showed an increase in conductivity at T ≤ 550 C in a humid atmosphere, which is due to appearance of proton transport. The dependence of conductivity on partial oxygen pressure (pO2 = 0.21 Ч 105 to 10-15 Pa) is studied in the temperature range of 500-1000 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 100 C to the low temperature range. © 2013 Pleiades Publishing, Ltd.
Keywords: ANION DOPING
BROWNMILLERITE
ION CONDUCTIVITY
OXYFLUORIDE
ANION DOPING
BROWNMILLERITE BA
BROWNMILLERITE STRUCTURE
BROWNMILLERITES
CONCENTRATION DEPENDENCE
ELECTRON COMPONENT
FLUORIDE ION
HOMOGENEITY REGIONS
HUMID ATMOSPHERES
ION CONDUCTIVITIES
ION TRANSPORT NUMBER
LOW CONCENTRATIONS
LOW TEMPERATURES
MEASUREMENT OF TEMPERATURE
OXYFLUORIDES
PARTIAL OXYGEN PRESSURES
POLARIZATION MEASUREMENTS
PRESSURE OF WATER
PROTON TRANSPORT
TEMPERATURE RANGE
TRANSPORT NUMBER
IONS
OXYGEN
PROTONS
ELECTRIC PROPERTIES
URI: http://hdl.handle.net/10995/27094
SCOPUS ID: 84873828582
WOS ID: 000314041600004
PURE ID: 898179
ISSN: 1023-1935
DOI: 10.1134/S102319351301014X
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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