Influence of Synthesis Conditions on the Crystal Structure of the Powder Formed in the ZrO2- Ce2O3/CeO2 System Full article
Conference |
Международная конференция «Плазменные, лазерные исследования и технологии» (ПЛИТ 2016) 25-27 Jan 2016 , Москва |
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Journal |
Journal of Physics: Conference Series
ISSN: 1742-6588 , E-ISSN: 1742-6596 |
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Output data | Year: 2016, Volume: 747, Article number : 012041, Pages count : 5 DOI: 10.1088/1742-6596/747/1/012041 | ||||||
Tags | FEATURES; Dy; Ln | ||||||
Authors |
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Abstract:
Influence of synthesis conditions (type of atmosphere, reduction and oxidation, annealing temperature) on the chemical composition and structure of the compounds formed in the "ZrO2 - Ce2O3 / CeO2" system has been investigated by X-ray absorption fine structure (XAFS) spectroscopy combined with X-ray diffraction (XRD) and thermogravimetric analysis (TGA). It is revealed that isothermal annealing of precursor at temperatures less than 1000 °C in air leads to formation of Ce0.5Zr0.5O2 powders with cubic fluorite-type structure (Fm-3m). Further increase of annealing temperatures above 1000 °C causes decomposition of formed crystal structure into two phases: cubic and tetragonal. Annealing in reduction hydrogen atmosphere causes formation of Ce4 + 2xCe3 + 2-2xZr2O7 + x compounds with intermediate valency of cerium, where value of x depends on the reducing conditions and treatment parameters of precursor. Annealing in vacuum at 1400 °C strongly reduces the content of Ce4+ in a powder samples and leads to formation of pyrochlore structure (space group Fd-3m) with practically Ce3+ valence state.
Cite:
Popov V.V.
, Menushenkov A.P.
, Khubbutdinov R.M.
, Svetogorov R.D.
, Zubavichus Y.V.
, Sharapov A.S.
, Kurilkin V.V.
Influence of Synthesis Conditions on the Crystal Structure of the Powder Formed in the ZrO2- Ce2O3/CeO2 System
Journal of Physics: Conference Series. 2016. V.747. 012041 :1-5. DOI: 10.1088/1742-6596/747/1/012041 WOS Scopus РИНЦ
Influence of Synthesis Conditions on the Crystal Structure of the Powder Formed in the ZrO2- Ce2O3/CeO2 System
Journal of Physics: Conference Series. 2016. V.747. 012041 :1-5. DOI: 10.1088/1742-6596/747/1/012041 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Submitted: | Sep 1, 2016 |
Published print: | Sep 1, 2016 |
Published online: | Sep 21, 2016 |
Identifiers:
Web of science | WOS:000387066400041 |
Scopus | 2-s2.0-84992038046 |
Elibrary | 27583028 |
Chemical Abstracts | 2016:1946004 |
Chemical Abstracts (print) | 172:365357 |
OpenAlex | W2521523406 |