Crystal structure, chemical stability and electrical properties of Sr2MnNbO6-delta, Sr2Cr0.5Mn0.5NbO6-delta and Sr2CuNbO6-delta perovskites / Tarasova N.,Colomban Ph,Animitsa I. // JOURNAL OF SOLID STATE ELECTROCHEMISTRY. - 2017. - V. 21, l. 11. - P. 3179-3187.

ISSN/EISSN:

1432-8488 / 1433-0768

Type:

Article

Abstract:

The 3d-cation-substituted perovskites Sr2MnNbO6 - delta, Sr2Cr0.5Mn0.5NbO6 - delta and Sr2CuNbO6 - delta were synthesized using the solid state technique. Conductivity measurements showed that the investigated phases exhibited mixed-electronic-ionic conductivity, and the total conductivity decreased in the row Sr2MnNbO6 - (delta)-Sr2Cr0.5Mn0.5NbO6 - delta-Sr2CuNbO6 - delta. The O2--conductivity was measured by oxygen permeation technique, and it was found that the Cu- and Cr-containing samples exhibited similar to 0.5 order of magnitude higher ionic conductivities at 500 A degrees C, and lower activation energies, 0.85 +/- 0.02 and 0.90 +/- 0.02 eV, respectively, than Mn-containing compound Sr2MnNbO6 - delta (1.16 +/- 0.03 eV). The conductivity, thermogravimetry and Raman measurements showed that these compositions did not intercalate the water and did not exhibit proton conductivity, but showed good chemical stability at high water vapour pressure. In contrast, the solid solution Sr2.9 - x Cu (x) Nb1.1O5.65 (x = 0.07; 0.15) with double perovskite structure was able to water uptake and to proton transport, but had a low chemical stability.

Author keywords:

Perovskite; Niobates; Conductivity; Raman investigations; Chemical stability OXIDE FUEL-CELL; HYBRID SYSTEMS; WATER-UPTAKE; TEMPERATURE; OXYGEN; CONDUCTIVITY; PERFORMANCE; DISTORTIONS; SR6TA2O11; CERAMICS

DOI:

10.1007/s10008-017-3640-1

Web of Science ID:

ISI:000413763100011

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
EISSN	1433-0768
Keywords-Plus	OXIDE FUEL-CELL; HYBRID SYSTEMS; WATER-UPTAKE; TEMPERATURE; OXYGEN; CONDUCTIVITY; PERFORMANCE; DISTORTIONS; SR6TA2O11; CERAMICS
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	Natalia.Tarasova@urfu.ru
Number-of-Cited-References	45
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	2
Journal-ISO	J. Solid State Electrochem.
Doc-Delivery-Number	FK8MP