Defect structure and charge transfer in the double perovskite GdBaCo 2O6 - δ / Tsvetkov D.S., Sereda V.V., Zuev A.Y. // Solid State Ionics. - 2011. - V. 192, l. 1. - P. 215-219.

ISSN:

01672738

Type:

Conference Paper

Abstract:

The results of oxide ion and total conductivity, and Seebeck coefficient measured as a function of oxygen partial pressure, pO2, in temperature range 820 ≤ T °C ≤ 1070 are presented for GdBaCo 2O6 - δ with double perovskite structure. Data on Seebeck coefficient as a function of oxygen nonstoichiometry, δ, 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-δ diagram. Thermodynamic enhancement factor, W=-∂lnpO2∂lnVO••T, was shown to have a maximum at δ = 1. This was explained by the change of order degree of oxygen sublattice of GdBaCo2O6 - δ. 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. © 2010 Elsevier B.V. All rights reserved.

Author keywords:

Defect species mobility; Defect structure; Double perovskite; Oxide ion conductivity; Oxygen nonstoichiometry; Seebeck coefficient; Total conductivity

Index keywords:

Defect species mobility; Double perovskites; Oxide ion conductivity; Oxygen nonstoichiometry; Seebeck; Total conductivity; Activation energy; Charge transfer; Defect structures; Defects; Ion exchange;

DOI:

10.1016/j.ssi.2010.03.022

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-79958787782&doi=10.1016%2fj.ssi.2010.03.022&partnerID=40&md5=571e14b60e8f57ba7690626dd42bd9cc

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Другие поля

Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-79958787782&doi=10.1016%2fj.ssi.2010.03.022&partnerID=40&md5=571e14b60e8f57ba7690626dd42bd9cc
Affiliations	Department of Chemistry, Ural State University, Lenin av.51, 620083, Ekaterinburg, Russian Federation
Author Keywords	Defect species mobility; Defect structure; Double perovskite; Oxide ion conductivity; Oxygen nonstoichiometry; Seebeck coefficient; Total conductivity
References	Maignan, A., Martin, C., Pelloquin, D., Nguyen, N., Raveau, B., (1999) J. Solid State Chem., 142, p. 247; Taskin, A.A., Lavrov, A.N., Ando, Y., (2005) Phys. Rev. B, 71, p. 134; Burley, J.C., Mitchell, J.F., Short, S., Miller, D., Tang, Y., (2003) J. Solid State Chem., 170, p. 339; Malavasi, L., Diaz-Fernandez, Y., Cristina Mozzati, M., Ritter, C., (2008) Solid State Commun., 148, p. 87; Tarancón, A., Marrero-López, D., Peña-Martínez, J., Ruiz-Morales, J.C., Núñez, P., (2008) Solid State Ionics, 179, p. 611; Kim, J.-H., Manthiram, A., (2008) J. Electrochem. Soc., 155, p. 385; Zhang, K., Ge, L., Ran, R., Shao, Z., Liu, S., (2008) Acta Mater., 56, p. 4876; Tarancón, A., Skinner, S.J., Chater, R.J., Hernandez-Ramirez, F., Kilner, J.A., (2007) J. Mater. Chem., 17, p. 3175; Petrov, A.N., Zuev, A.Yu., Vylkov, A.I., (2005) Russian J. Phys. Chem, 79, p. 220; Wiemhoefer, H.-D., Bremes, H.-G., Nigge, U., Zipprich, W., (2002) Solid State Ionics, 150, p. 63; Tsvetkov, D.S., Sereda, V.V., Zuev, A.Yu., (2010) Solid State Ionics, 180, p. 1620; Heikes, R.R., (1961) Thermoelectricity: Science and Engineering, p. 351
Correspondence Address	Zuev, A. Y.; Department of Chemistry, Ural State University, Lenin av.51, 620083, Ekaterinburg, Russian Federation; email: andrew.zuev@usu.ru
CODEN	SSIOD
Language of Original Document	English
Abbreviated Source Title	Solid State Ionics
Source	Scopus