Proton and oxygen-ion conductivity of Ba(4)Ca(2)Nb(2)O(11) / Animitsa I,Neiman A,Kochetova N,Melekh B,Sharafutdinov A // SOLID STATE IONICS. - 2003. - V. 162, l. SI. - P. 63-71.

ISSN/EISSN:

0167-2738 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The structure, conductivity and water uptake of the oxygen-deficient compound Ba(4)Ca(2)Nb(2)O(11) have been investigated. Ba(4)Ca(2)Nb(2)O(11) is found to crystallize in the cryolite structure with a = 8.4449 Angstrom. The compound may be fully hydrated up to maximum water content approximately 1 mol H(2)O per mol Ba(4)Ca(2)Nb(2)O(11), this process is accompanied by a reversible phase transformation due to formation of hydrate-like compound. In wet air, the temperature dependence of total conductivity shows a different behavior because of change in proton transport mechanism: small local maximum as a result of phase transformation (T = 350 degreesC), linear relationship with activation energy 0.55 eV at the temperature range 350-230 degreesC and 1.02 eV at lower temperature. A comparative analysis with Ba(3)Ca(1.18)Nb(1.18)O(9-delta) was made. (C) 2003 Elsevier B.V. All rights reserved.

Author keywords:

Ba(4)Ca(2)Nb(2)O(11); cryolite structure; oxygen and protonic conduction CONDUCTORS

DOI:

10.1016/S0167-2738(03)00246-7

Web of Science ID:

ISI:000186197100011

Соавторы в МНС:

Другие поля

Поле	Значение
Note	11th International Conference on Solid State Protonic Conductors (SSPC 11), UNIV SURREY, GUILDFORD, ENGLAND, AUG 27-30, 2002
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	CONDUCTORS
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Author-Email	irina.animitsa@usu.ru
ResearcherID-Numbers	Melekh, Bewrnard/E-4262-2014
Number-of-Cited-References	14
Usage-Count-Since-2013	2
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	736WX