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Synthesis and structure of compounds of the homological series TinO2n–1 obtained by reduction in a hydrogen environment
https://doi.org/10.22349/1994-6716-2024-119-3-57-71
Abstract
The paper considers one of the insufficiently explored methods for the synthesis of compounds of the homologous series TinO2n–1, in particular the method of hydrogen reduction. A series of samples (n = 2–8) were obtained from initial TiO2 powders of various chemical purities (99.0–99.99%) with modification with rutile in a wide range of temperatures and reduction times in a hydrogen environment. The influence of the purity of the initial samples, temperature and recovery time on the structure of the resulting compounds was established. Differences in the crystal structure of compounds of the homologous series TinO2n–1, as well as β- and λ-polymorphic modifications of Ti3O5, are shown. An approach to selecting the temperature and time of reduction of TiO2 powders to obtain a specific phase in compounds of the homologous series TinO2n–1 is substantiated.
Keywords
homologous series TinO2n–1,
reduction in hydrogen,
Rietveld method,
Le Bail method,
polymorphs,
Magneli phases
Supporting agencies: The work was carried out using the equipment of the Center for Collective Use “Joint Educational and Scientific Center for Collective Use” MIREA – Russian Technological University (contract No 075-15-2021-689). The authors express their gratitude to Anton Dmitrievich Sokolov from JSC NPP “ISTOK” named after A. Shokin for the synthesis and provision of samples of TiO2, TinO2n-1. The authors are grateful to the Laboratory of Ceramic Materials and Technologies of the Russian Technological University MIREA for providing the opportunity to work with their laboratory equipment as part of their research interests. The authors thank Anastasia A. Kholodkova for her assistance in conducting the SEM-EDS experiment.
About the Authors
A. N. Khrustalev
“MIREA – Russian Technological University”
Russian Federation
Russian Federation
78, bld 4, Vernadsky Ave, 119454 Moscow
L. A. Arbanas
“MIREA – Russian Technological University”
Russian Federation
Russian Federation
78, bld 4, Vernadsky Ave, 119454 Moscow
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Review
For citations:
Khrustalev A.N., Arbanas L.A. Synthesis and structure of compounds of the homological series TinO2n–1 obtained by reduction in a hydrogen environment. Voprosy Materialovedeniya. 2024;(3(119)):57-71. (In Russ.) https://doi.org/10.22349/1994-6716-2024-119-3-57-71
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