The thermodynamic characteristics of point defects and the mechanism of electricity transfer in copper-containing lanthanum cobaltite LaCo1-xCuxO3-delta(x=0.3 / Petrov AN,Zuev AY,Vylkov AI // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY. - 2005. - V. 79, l. 2. - P. 173-178.

ISSN/EISSN:

0036-0244 / нет данных

Type:

Article

Abstract:

The specific conductivity and the thermoelectric coefficient of perovskite-like copper-containing lanthanum cobaltite LaCo0.7Cu0.3O3-delta were measured over temperature and pressure ranges 1123-1273 K and 10(-3)-0.21 atm. respectively. The oxide under study was characterized by noticeable oxygen nonstoichiometry (0.02 less than or equal to delta less than or equal to 0.12), metal conduction (300 < sigma < 500 Omega(-1) cm(-1)), and small positive thermoelectric coefficient values (20 less than or equal to Q less than or equal to 25 muV K-1). A joint analysis of the thermodynamic characteristics of formation of equilibrium defects and the dependences of thermoelectromotive force and conduction on medium parameters (temperature and partial pressure of oxygen) showed that electricity in LaCo0.7Cu0.3O3-delta was transported following a mixed mechanism by large- and small-radius polarons. The role of large-radius polarons was played by quasi-free holes h(.), whereas electrons localized on copper atoms Cu-Co(') were small-radius polarons. The transfer numbers, heats of transfer, and mobilities were determined for both types of charge carriers.

Author keywords:

нет данных

DOI:

нет данных

Web of Science ID:

ISI:000227132500006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	FEB
Publisher	INTERPERIODICA
Address	PO BOX 1831, BIRMINGHAM, AL 35201-1831 USA
Language	English
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
Author-Email	alexander.petrov@usu.ru
ResearcherID-Numbers	Vylkov, Aleksey/M-7433-2013 Zuev, Andrey/E-6220-2014
ORCID-Numbers	Vylkov, Aleksey/0000-0003-3988-1311
Number-of-Cited-References	9
Usage-Count-Since-2013	10
Journal-ISO	Russ. J. Phys. Chem.
Doc-Delivery-Number	899GI