The diffusion of oxygen and ion transport in lanthanum cobaltite LaCoO3-delta / 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/EISSN:

0036-0244 / нет данных

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 p(O2) (atm) and temperature T(K) over the ranges -4 <= log p(O2) <= 0 and 1173 K <= T <= 1323 K. The mobilities (cm(2)/(V s)) of oxygen vacancies calculated over the temperature range studied satisfy the inequalities 1.8 x 10(-5) <= V-V0 <= 3.4 x 10(-5). The transfer numbers of oxygen vacancies were calculated. These numbers change depending on oxygen partial pressure over the range 5 x 10(-7) <= t(0) <= 1 x 10(-5). The activation energy of self-diffusion of oxygen vacancies was found to be E-a = 104 +/- 1- kJ/mol (1.1 +/- 0.1 eV).

Author keywords:

PEROVSKITE-TYPE OXIDES; ELECTRICAL-PROPERTIES; DEFECT STRUCTURE; NONSTOICHIOMETRY; CONDUCTIVITY

DOI:

10.1134/S0036024408050282

Web of Science ID:

ISI:000255747800028

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	PEROVSKITE-TYPE OXIDES; ELECTRICAL-PROPERTIES; DEFECT STRUCTURE; NONSTOICHIOMETRY; CONDUCTIVITY
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	Dmitrii.Tsvetkov@usu.ru
ResearcherID-Numbers	Tsvetkov, Dmitry/N-2491-2016 Vylkov, Aleksey/M-7433-2013 Zuev, Andrey/E-6220-2014
ORCID-Numbers	Vylkov, Aleksey/0000-0003-3988-1311
Number-of-Cited-References	22
Usage-Count-Since-2013	18
Journal-ISO	Russ. J. Phys. Chem. A
Doc-Delivery-Number	299HX