Synthesis and Study of Phases with a Hollandite-Type Structure, Crystallizing in the Systems Cs2O–M2O3(MO)–TiO2 (M = Al, Fe, Сu, Ni, Mg)

Ceramics based on hollandites are known to mainly produced by the conventional solid-phase method. However, the use of various sol–gel methods in some cases makes it possible to change the temperature and time its synthesis, morphological characteristics, porosity, and electrophysical properties. In...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2022-07, Vol.67 (7), p.963-969
Main Authors: Sinel’shchikova, O. Yu, Besprozvannykh, N. V., Rogova, D. A., Kuchaeva, S. K., Galankina, O. L.
Format: Article
Language:English
Subjects:
Aluminum
Ceramics
Cesium oxides
Chemical sensors
Chemistry
Chemistry and Materials Science
Electrical resistivity
Fuel cells
Inorganic Chemistry
Iron
Magnesium
Sol-gel processes
Solid phases
Synthesis
Synthesis and Properties of Inorganic Compounds
Titanium dioxide
X ray powder diffraction
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Summary:Ceramics based on hollandites are known to mainly produced by the conventional solid-phase method. However, the use of various sol–gel methods in some cases makes it possible to change the temperature and time its synthesis, morphological characteristics, porosity, and electrophysical properties. In this work, ceramic materials based on a number of cesium titanate hollandite phases were synthesized by combustion of citrate–nitrate mixtures. The structure of the obtained materials was studied by X-ray powder diffraction analysis and scanning electron microscopy. Investigation of the electrophysical properties showed that, in a hydrogen flow, the electrical conductivity of hollandites with aluminum and nickel increases significantly (by 2.5–3 orders of magnitude) throughout the studied temperature range. Thus, ceramics based on these hollandites can be considered promising for creating hydrogen sensors and fuel cells.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023622060213