The diffusion of oxygen and ion transport in lanthanum cobaltite LaCoO 3-δ / Tsvetkov D.S., Vylkov A.I., Zuev A.Yu., Petrov A.N. // Russian Journal of Physical Chemistry A. - 2008. - V. 82, l. 5. - P. 855-859.

ISSN:

00360244

Type:

Article

Abstract:

The chemical diffusion coefficient of oxygen vacancies and oxygen ion conductivity in lanthanum cobaltite LaCoO3 were determined by the polarization method as functions of oxygen partial pressure po2 (atm) and temperature T(K) over the ranges -4 ≤ log pO2 0 and 1173 K ≤ T ≤ 1323 K. The mobilities (cm2/(V s)) of oxygen vacancies calculated over the temperature range studied satisfy the inequalities 1.8 × 10-5 ≤ v v 0 ≤ 3.4 × 10-5. The transfer numbers of oxygen vacancies were calculated. These numbers change depending on oxygen partial pressure over the range 5 × 10-7 ≤s t 0 ≤ 1 × 10-5. The activation energy of self-diffusion of oxygen vacancies was found to be E a= 104 ± 10 kJ/mol (1.1 ± 0.1 eV). © 2008 MAIK Nauka.

Author keywords:

Index keywords:

Diffusion; Lanthanum compounds; Polarization; Thermal effects; Ion conductivity; Transfer numbers; Oxygen

DOI:

10.1134/S0036024408050282

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Affiliations	Ural State University, pr. Lenina 51, Yekaterinburg, 620083, Russian Federation
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Correspondence Address	Tsvetkov, D. S.; Ural State University, pr. Lenina 51, Yekaterinburg, 620083, Russian Federation; email: Dmitrii.Tsvetkov@usu.ru
Language of Original Document	English
Abbreviated Source Title	Russ. J. Phys. Chem. A
Source	Scopus