Thermal and spectroscopic properties of Ba2In2–xWxO5 + 3x/2 solid solutions

We have prepared perovskite-like Ba 2 In 2– x W x O 5 + 3 x /2 (0 ≤ x ≤ 0.67) solid solutions containing oxygen vacancies, whose concentration decreases with increasing x. Thermogravimetry data indicate reversible interaction of the solid solutions with water vapor in the temperature range 250–450°C...

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Bibliographic Details
Published in:Inorganic materials 2015, Vol.51 (11), p.1120-1126
Main Authors: Kochetova, N. A., Alyabysheva, I. V., Belova, K. G., Animitsa, I. E.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
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Summary:We have prepared perovskite-like Ba 2 In 2– x W x O 5 + 3 x /2 (0 ≤ x ≤ 0.67) solid solutions containing oxygen vacancies, whose concentration decreases with increasing x. Thermogravimetry data indicate reversible interaction of the solid solutions with water vapor in the temperature range 250–450°C, which leads to the formation of proton defects in the structure of the oxides. The nature of the forming H + -containing species has been identified by IR spectroscopy. Raman spectroscopy has been used to determine the positions of the In 3+ and W 6+ ions in the structure of the solid solutions and assess the effect of hydration on their local environment and that of the composition of the solid solutions on the degree of hydration.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168515110047