Double perovskites with oxygen structural vacancies: Raman spectra, conductivity and water uptake / Colomban P,Romain F,Neiman A,Animitsa I // SOLID STATE IONICS. - 2001. - V. 145, l. 1-4. - P. 339-347.

ISSN/EISSN:

0167-2738 / нет данных

Type:

Article; Proceedings Paper

Abstract:

The perovskite-related phases Sr6Ta2O11, Sr-5.92,Ta2.08O11.12(V-o(s))(0.88), Sr5.46Ta2.54O11.81(V-o(s))(0.19), Ba6NbO11(V-o(s))(1), Ba4Ca2Nb2O11, where V-o(s) stands for `oxygen structural vacancies', have been studied by thermogravimetry, AC-conductivity and IR and Raman spectroscopy. A correlation between water uptake and nominal V-o(s) concentration was established, but the nature of the alkaline earth metal atom influences the oxygen sublattice: Ba6Nb2O11 (V-o(s)), has zero water uptake. The relationship between short-range disorder and water uptake is clear: only compounds having a strong oxygen and cation lattice disorder exhibit maximal water uptake: Sr6Ta2O11 and Ba4Ca2Nb2O11. The protonic species change during cooling-heating. (C) 2001 Elsevier Science B.V. All rights reserved.

Author keywords:

proton conductors; defects; conductivity; Raman; IR; perovskites NIOBIUM OXIDES; DISORDER; CONDUCTORS; NASICON

DOI:

10.1016/S0167-2738(01)00929-8

Web of Science ID:

ISI:000172095500044

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC
Note	10th International Conference on Solid State Protonic Conductors (SSPC10), MONTPELLIER, FRANCE, SEP 24-28, 2000
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
Keywords-Plus	NIOBIUM OXIDES; DISORDER; CONDUCTORS; NASICON
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Number-of-Cited-References	20
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	20
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	491ER