Defect structure and charge transfer in the double perovskite GdBaCo2O6 (- delta) / Tsvetkov D. S.,Sereda V. V.,Zuev A. Yu. // SOLID STATE IONICS. - 2011. - V. 192, l. 1, SI. - P. 215-219.

ISSN/EISSN:

0167-2738 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The results of oxide ion and total conductivity, and Seebeck coefficient measured as a function of oxygen partial pressure. p(o2), in temperature range 820 <= T degrees C <= 1070 are presented for GdBaCo2O6 (- delta) with double perovskite structure. Data on Seebeck coefficient as a function of oxygen nonstoichiometry, delta, was successfully described on the basis of the defect structure model proposed for this compound earlier. Mobilities of charged defect species were calculated using data on total conductivity and p(o2)-T-delta diagram. Thermodynamic enhancement factor, W = -(partial derivative Inpo(2)/In-partial derivative{[}V-o(-)])(T), was shown to have a maximum at delta = 1. This was explained by the change of order degree of oxygen sublattice of GdBaCo2O6 (- delta). Activation energy of oxide ion conductivity was found to come to value of 0.96 +/- 0.06 eV and that of oxygen vacancies mobility varies within the range 0.53-0.78 eV depending on oxygen nonstoichiometry. (C) 2010 Elsevier B.V. All rights reserved.

Author keywords:

Oxygen nonstoichiometry; Double perovskite; Defect structure; Total conductivity; Seebeck coefficient; Oxide ion conductivity; Defect species mobility OXIDE FUEL-CELLS; CATHODES; LNBACO(2)O(5+DELTA)

DOI:

10.1016/j.ssi.2010.03.022

Web of Science ID:

ISI:000292848800048

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUN 16
Note	17th International Conference on Solid State Ionics, Toronto, CANADA, JUN 28-JUL 03, 2009
Organization	Int Soc Solid State Lonics
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	OXIDE FUEL-CELLS; CATHODES; LNBACO(2)O(5+DELTA)
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Author-Email	andrew.zuev@usu.ru
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Sereda, Vladimir/J-9810-2014 Tsvetkov, Dmitry/N-2491-2016
ORCID-Numbers	Sereda, Vladimir/0000-0002-1420-2573
Number-of-Cited-References	12
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	28
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	793UG