Oxygen nonstoichiometry of the copper-substituted lanthanum cobaltite LaCo0.9Cu0.1O3-(delta) / Zuev AY,Petrov AN,Pankov DV // . - 1999. - V. 99, l. 19. - P. 424-431.

ISSN/EISSN:

нет данных / нет данных

Type:

Proceedings Paper

Abstract:

Oxygen nonstoichiometry of LaCo0.9Cu0.1O3-delta has been studied as a function of temperature (1123-1473 K) and oxygen pressure (10(-3)=Po-2, atm =1) by using both thermogravimetry (TG) method and coulometric titration in a solid electrolyte cell. The absolute values of oxygen nonstoichiometry delta are calculated from the results of the direct reduction of the samples of LaCo0.9Cu0.1O3-delta in a flux of hydrogen in the TG cell. It was established that oxygen nonstoichiometry has a deficient character (positive delta values). A defect model is proposed for LaCo0.9Cu0.1O3-delta. It is concluded that oxygen vacancies v(o)(..) and ``delocalized{''} electrons are being formed when oxygen is removed from the oxide lattice. The equilibrium constants and enthalpy of defects formation were calculated.

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DOI:

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Web of Science ID:

ISI:000082287800050

Соавторы в МНС:

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Другие поля

Поле	Значение
Editor	Singhal, SC and Dokiya, M
Booktitle	SOLID OXIDE FUEL CELLS (SOFC VI)
Series	ELECTROCHEMICAL SOCIETY SERIES
Note	6th International Symposium on Solid Oxide Fuel Cells (SOFC-VI), HONOLULU, HI, OCT 17-22, 1999
Organization	Electrochem Soc, High Temp Mat Div; Electrochem Soc, Battery Div; SOFC Soc Japan
Publisher	ELECTROCHEMICAL SOCIETY INC
Address	65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
Language	English
ISBN	1-56677-242-7
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014
Number-of-Cited-References	7
Usage-Count-Since-2013	3
Doc-Delivery-Number	BN57J