Equilibrium of point defects and charge transfer in lanthanum cobaltite / Petrov A. N.,Zuev A. Yu.,Vylkov A. I.,Tsvetkov D. S. // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY. - 2006. - V. 80, l. 1. - P. S128-S133.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

The specific conductivity log sigma(T) and thermal electromotive force coefficient Q(T) of perovskite- like lanthanum cobaltite were measured over the temperature range 1173 K <= T <= 1323 K depending on the partial pressure of oxygen ( 10 -(8) atm <= P-O2 <= 1 atm). The P-O2 - T - delta phase diagram of solid LaCoO3 - delta studied earlier was used to recalculate the electric property data into the log sigma(T) -delta and Q(T)-delta dependences. The isoconcentration temperature dependences of specific conductivity ( log sigma) d - 1/ T and Seebeck coefficient Q delta - 1/ T for LaCoO3-delta were analyzed. The conclusion was drawn that charge transfer was activation in character and had a low activation energy. This was evidence that small- radius polarons ( and) were responsible for charge transfer in perovskite- like lanthanum cobaltite. The calculated equilibrium constants for the formation of electronic defects and functional dependences of defect concentration {[}Co-co](T) = f 1 (delta) and {[}Co-Co](T) = f2 (delta) were used to analyze polaron transfer parameters in LaCoO3 -delta.

Author keywords:

нет данных

DOI:

10.1134/S003602440613022X

Web of Science ID:

ISI:000202973400022

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	alexander.petrov@usu.ru
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Vylkov, Aleksey/M-7433-2013
ORCID-Numbers	Vylkov, Aleksey/0000-0003-3988-1311
Number-of-Cited-References	20
Usage-Count-Since-2013	12
Journal-ISO	Russ. J. Phys. Chem.
Doc-Delivery-Number	V43ZQ