Effect of Humidity on Conductivity of Ba4Ca2Nb2O11 Phase and Solid Solutions Based on This Phase / Korona D. V.,Neiman A. Ya.,Animitsa I. E.,Sharafutdinov A. R. // RUSSIAN JOURNAL OF ELECTROCHEMISTRY. - 2009. - V. 45, l. 5. - P. 586-592.

ISSN/EISSN:

1023-1935 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The conductivity of the Ba4Ca2Nb2O11 phase and its solid solutions of the formulas Ba4.4Ca1.6Nb2O11 and Ba3.4Ca2.6Nb2O11 is studied as a function of the partial pressure of the water vapor at 2 x 10(-2)-3 x 10(-5) atm (log P-H2O = -1.7...-4.5) and temperatures of 400-600 degrees C. A model, which is based on the model of structural oxygen vacancies, is proposed for the quasichemical description, providing an adequate explanation of the experimental dependences log sigma(tot) = f(log P-H2O). It is shown that in the region dominated by the proton transport the log dependences of the conductivity on P-H2O have the slope of 1/3. Proton transport numbers are calculated at the given temperatures and pressures of the water vapor.

Author keywords:

double perovskite; Ba4Ca2Nb2O11; oxygen vacancies; water vapor pressure; protonic conductivity PROTON

DOI:

10.1134/S1023193509050176

Web of Science ID:

ISI:000266395300017

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAY
Note	9th Conference on Fundamental Problems of Solid-State Ionics, Chernogolovka, RUSSIA, JUN 24-27, 2008
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	PROTON
Research-Areas	Electrochemistry
Web-of-Science-Categories	Electrochemistry
Author-Email	danil.korona@usu.ru
Number-of-Cited-References	7
Usage-Count-Since-2013	2
Journal-ISO	Russ. J. Electrochem.
Doc-Delivery-Number	450IX